JP7702834B2 - Environmental load value fluctuation token calculation device, optical component manufacturing system, and environmental load value fluctuation token calculation method - Google Patents

Description

The present disclosure relates to an environmental load value fluctuation token calculation device, an optical component manufacturing system, and an environmental load value fluctuation token calculation method.

Recently, due to the problem of global warming, technologies for reducing the environmental load are being considered.
For example, there is a CO2 reduction credit calculation system that uses wastewater oils and fats to reduce CO2 and calculates CO2 reduction credits based on this (see Patent Document 1). This system calculates the amount of CO2 reduction using input information, and calculates CO2 reduction credits based on the amount of CO2 reduction.

Patent No. 6763594

Here, we focus on a method for manufacturing resins used in optical materials for plastic lenses. For example, in a cast polymerization method in which a polymerizable composition containing a monomer is injected into a mold and then heated and cured, the environmental load changes when the manufacturing process or manufacturing conditions are changed, but the amount of change in the environmental load is not calculated. Furthermore, when tokens are obtained according to the amount of change in the environmental load, it is not possible to determine in advance how many tokens will be obtained.

The problem to be solved by one embodiment of the present disclosure is to provide an environmental load value fluctuation token calculation device, an optical component manufacturing system, and an environmental load value fluctuation token calculation method that can calculate a token according to the fluctuation of the environmental load value in the manufacture of optical components by polymerizing a composition containing a polymerizable compound for optical materials and a polymerization catalyst.

Specific means for solving the above problems include the following aspects.
<1> An environmental load value fluctuation token calculation device that calculates an environmental load value fluctuation token in the production of an optical component by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst,
a first acquisition unit that acquires first energy amount information indicating an amount of energy input to a polymerization unit in the production of the optical member;
a second acquisition unit that acquires second energy amount information indicating an amount of energy input for maintaining a temperature of a space in which the polymerization unit is disposed in the optical member manufacturing process;
A third acquisition unit that acquires yield information of the optical members manufactured in the optical member manufacturing process;
a calculation unit that calculates a fluctuation token according to a fluctuation amount of the environmental load value from an environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and an environmental load value B generated under a given optical component manufacturing condition by polymerization different from the optical component manufacturing condition; and
An environmental load value fluctuation token calculation device comprising:
<2> The calculation unit,
(1) A fluctuation amount of the environmental load value calculated from the difference between a given number of polymerization parts and the number of polymerization parts used in the production of the optical member, the environmental load value required for producing one polymerization part, and the environmental load value required for storing one polymerization part,
(2) a difference between the number of temperature adjustment devices for a given polymerization section and the number of temperature adjustment devices for the polymerization section used in the optical component manufacturing, an environmental load value required for manufacturing one temperature adjustment device, and an environmental load value due to the exhaust heat of one temperature adjustment device; and (3) at least one of the amounts of fluctuation in the environmental load value calculated from an environmental load value required for processing a given optical component and an environmental load value required for processing the optical component manufactured by the optical component manufacturing.
The environmental load value A;
The environmental load value fluctuation token calculation device according to <1>, which calculates the fluctuation token from the environmental load value B.
<3> The calculation unit,
An environmental load value fluctuation token calculation device as described in <1> or <2>, which calculates the environmental load value A from the first energy amount information, the second energy amount information, the yield information, and the amount of cutting dust generated when processing an optical component manufactured in the polymerization section in the optical component manufacturing process.
<4> The environmental load value fluctuation token calculation device according to any one of <1> to <3>, wherein the first energy amount information and the second energy amount information indicate an energy amount per optical member.
<5> The environmental load value fluctuation token calculation device according to any one of <1> to <4>, further comprising an additional granting unit that grants additional tokens when the environmental load value fluctuation tokens calculated by the calculation unit exceed a given token value.
<6> The method for producing an optical member according to any one of <1> to <5>, wherein the polymerizable composition for an optical material in the casting step has a viscosity of 10 mPa·s to 1000 mPa·s as measured with a Brookfield viscometer under conditions of 25° C. and 60 rpm.
<7> The composition includes a prepolymer obtained by polymerizing at least two kinds of polymerizable compounds for optical materials among the two or more different polymerizable compounds for optical materials,
The environmental load value fluctuation token calculation device according to any one of <1> to <6>, wherein the content of the polymerization catalyst is 0.010 parts by mass to 2.0 parts by mass with respect to a total of 100 parts by mass of the two or more different polymerizable compounds for optical materials and the prepolymer.
<8> The environmental load value fluctuation token calculation device according to any one of <1> to <7>, wherein one of the polymerizable compounds for optical materials includes at least one compound selected from the group consisting of a polyisocyanate compound, an episulfide compound, and an epoxy compound.
<9> The environmental load value fluctuation token calculation device according to any one of <1> to <8>, wherein the other polymerizable compound for an optical material includes at least one active hydrogen compound selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound containing one or more mercapto groups and one or more hydroxyl groups, a polyol compound containing two or more hydroxyl groups, and an amine compound.
<10> The environmental load value fluctuation token calculation device according to any one of <1> to <9>, wherein the polymerization catalyst includes at least one selected from the group consisting of a basic catalyst having a pKa value of 4 to 8 and an organometallic catalyst.
<11> The environmental load value fluctuation token calculation device according to any one of <1> to <10>, further including a manufacturing condition determination unit that determines manufacturing conditions for the optical component manufacturing based on the calculated fluctuation token so that the fluctuation token becomes equal to or greater than a given value.
<12> An environmental load value fluctuation token calculation device according to <11>,
a manufacturing condition control device that controls manufacturing conditions in the manufacturing of the optical member so as to achieve the determined manufacturing conditions;
An optical component manufacturing system comprising:
<13> An environmental load value fluctuation token calculation method in an environmental load value fluctuation token calculation device that calculates an environmental load value fluctuation token in the production of an optical component by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, comprising:
a first acquisition unit acquires first energy amount information indicating an amount of energy to be input to a polymerization unit in the production of the optical member;
a second acquisition unit acquires second energy amount information indicating an amount of energy input for maintaining a temperature of a space in which the polymerization unit is disposed in the optical member manufacturing process;
a third acquisition unit acquires yield information of the optical component manufactured in the optical component manufacturing process;
a calculation unit calculating a fluctuation token according to an amount of fluctuation in the environmental load value from an environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and an environmental load value B generated under given optical component manufacturing conditions by polymerization that are different from the optical component manufacturing conditions.

According to one embodiment of the present disclosure, it is possible to provide an environmental load value fluctuation token calculation device, an optical component manufacturing system, and an environmental load value fluctuation token calculation method that can calculate a token according to the fluctuation of the environmental load value in the manufacture of an optical component by polymerizing a composition containing a polymerizable compound for optical materials and a polymerization catalyst.

FIG. 2 is a functional block diagram for explaining an example of an environmental load value fluctuation token calculation device according to the first embodiment. 5 is a flowchart showing an example of a processing routine executed by the environmental load value fluctuation token calculation device of the first embodiment. FIG. 1 is a schematic diagram illustrating an example of an optical member manufacturing system. FIG. 1 is a diagram illustrating an example of the configuration of a computer that realizes an environmental load value fluctuation token calculation device and a manufacturing condition control device. FIG. 11 is a functional block diagram for explaining an example of an environmental load value fluctuation token calculation device according to a second embodiment. 13 is a flowchart showing an example of a processing routine executed by an environmental load value fluctuation token calculation device according to a second embodiment.

In the present disclosure, a numerical range expressed using "to" means a range that includes the numerical values before and after "to" as the lower and upper limits.
In the present disclosure, when a plurality of substances corresponding to each component are present in the composition, the amount of each component in the composition means the total amount of the plurality of substances present in the composition, unless otherwise specified.
In the numerical ranges described in the present disclosure in stages, the upper or lower limit value described in one numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. In addition, in the numerical ranges described in the present disclosure, the upper or lower limit value of the numerical range may be replaced with a value shown in the examples.
In the present disclosure, the term "step" refers not only to an independent step, but also to a step that cannot be clearly distinguished from other steps, as long as the intended purpose of the step is achieved.

[First embodiment]
<Outline of this embodiment>
In this embodiment, a token is calculated according to the amount of fluctuation in the environmental load value in the optical component manufacturing process that employs a short-time polymerization process. At this time, the environmental load value fluctuation token is calculated using the amount of energy input to the polymerization section in the optical component manufacturing process, the amount of energy input to maintain the temperature of the space in which the polymerization section is located, and the yield information of the optical components manufactured in the optical component manufacturing process.
Here, the environmental load value change token is something that substitutes the amount of change in the environmental load value for some other value, such as electronic currency.

<Configuration of the environmental load value fluctuation token calculation device according to this embodiment>
FIG. 1 is a block diagram showing an example of a functional configuration of an environmental load value fluctuation token calculation device 100 according to this embodiment.

The environmental load value fluctuation token calculation device 100 functionally comprises a first acquisition unit 102, a second acquisition unit 104, a third acquisition unit 106, a calculation unit 108, and a manufacturing condition determination unit 110, as shown in FIG.
The first acquisition unit 102 acquires first energy amount information indicating an amount of energy to be input to a polymerization unit in the production of an optical component by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst. Specifically, the first energy amount information indicates an amount of energy per optical component to be input to the polymerization unit in the production of the optical component, the amount of energy being input by a user.
The second acquisition unit 104 acquires second energy amount information indicating the amount of energy input to maintain the temperature of the space in which the polymerization portion is arranged in the optical member production. Specifically, the second energy amount information indicates the amount of energy input per optical member, input by the user, to maintain the temperature of the space in which the polymerization portion is arranged in the optical member production.
The third acquisition unit 106 acquires yield information of the optical members manufactured in the optical member manufacturing process. Specifically, the third acquisition unit 106 acquires yield information of the optical members manufactured in the optical member manufacturing process input by the user.
Here, the first energy amount information, the second energy amount information, and the yield information may be information obtained from the production results, production experiments, or production simulations in the production of the optical member.

The calculation unit 108 calculates an environmental load value A in the production of the optical member from the first energy amount information, the second energy amount information, and the yield information.
Specifically, the calculation unit 108 calculates the environmental load value A from the amount of energy per optical component that is input to the polymerization section in each process of the optical component production, obtained from the first energy amount information, the amount of energy per optical component that is input to maintain the temperature of the space in which the polymerization section is located in each process of the optical component production, obtained from the second energy amount information, the yield indicated by the yield information, and the number of optical components produced.
For example, the environmental load value A is calculated by multiplying the sum of the amount of energy per optical component input to the polymerization section in each process of the optical component production, obtained from the first energy amount information, and the amount of energy per optical component input to maintain the temperature of the space in which the polymerization section is located in each process of the optical component production, obtained from the second energy amount information, by the number of optical components manufactured multiplied by the reciprocal of the yield. Here, the number of optical components manufactured may be the number of actual productions or the number of planned productions.
The amount of cutting dust generated when processing the optical members manufactured in the polymerization section in the optical member manufacturing process may be further taken into consideration in calculating the environmental load value A. For example, the environmental load value A may be calculated by further adding the product of the planned number of optical members manufactured multiplied by the reciprocal of the yield to the amount of energy corresponding to the amount of cutting dust per optical member.

The calculation unit 108 also calculates an environmental load value B that occurs under optical component manufacturing conditions by given polymerization, which are different from the optical component manufacturing.
Specifically, the calculation unit 108 calculates environmental load value B, similar to environmental load value A, from the amount of energy per optical element input to the polymerization section in each process under predetermined, given conditions for manufacturing optical elements by polymerization, the amount of energy per optical element input to maintain the temperature of the space in which the polymerization section is located in each process under the conditions for manufacturing optical elements by polymerization, the yield under the conditions for manufacturing optical elements by polymerization, and the number of optical elements manufactured.
Here, as the conditions for producing an optical component by a given polymerization, the production conditions of a cast polymerization method in which a polymerizable composition containing a monomer is injected into a mold and cured by heating may be used. In the case of a conventionally known case in which the monomer contains a polyisocyanate compound and a polythiol compound having two or more mercapto groups, and these compounds are polymerized to produce an optical component having optical quality with few striae, the polymerization is often carried out for about 20 hours (see, for example, Japanese Patent Publication No. 2012-196934).

In addition, the calculation unit 108
(1) A fluctuation amount of the environmental load value calculated from the difference between a given number of polymerization parts and the number of polymerization parts used in the production of an optical component, the environmental load value required for the production of one polymerization part, and the environmental load value required for the storage of one polymerization part,
(2) At least one of the following is calculated: the difference between the number of temperature control devices for a given polymerization section and the number of temperature control devices for a polymerization section used in optical component manufacturing, the environmental load value required to manufacture one temperature control device, and the environmental load value due to the exhaust heat of one temperature control device; and (3) the amount of fluctuation in the environmental load value calculated from the environmental load value required to process a given optical component and the environmental load value required to process the optical component manufactured by the optical component manufacturing.
Specifically, the calculation unit 108 calculates a first additional fluctuation amount of the environmental load value from the difference between a given number of polymerization copies input by the user and the number of polymerization copies used in the production of the optical component, a predetermined environmental load value required for producing one polymerization copy, and a predetermined environmental load value required for storing one polymerization copy.
For example, the calculation unit 108 calculates a first additional fluctuation amount of the environmental load value by multiplying the sum of the environmental load value required to manufacture one polymerization part and the environmental load value required to store one polymerization part by the difference between a given number of polymerization parts and the number of polymerization parts used in the manufacture of the optical component.
In addition, the calculation unit 108 calculates a second additional fluctuation amount of the environmental load value from the difference between the number of temperature control devices for a given polymerization unit input by the user and the number of temperature control devices for the polymerization unit used in manufacturing the optical component, a predetermined environmental load value required to manufacture one temperature control device, and a predetermined environmental load value due to the exhaust heat of one temperature control device.
For example, the calculation unit 108 calculates a second additional fluctuation amount of the environmental load value by multiplying the sum of the environmental load value required to manufacture one temperature control device and the environmental load value due to the heat exhausted from one temperature control device by the difference between a given number of polymerization copies and the number of polymerization copies used in manufacturing the optical component.
In addition, the calculation unit 108 calculates a third additional fluctuation amount of the environmental load value from the difference between a predetermined environmental load value required for processing a given optical component and an environmental load value required for processing an optical component manufactured by the optical component manufacturing process input by the user.

The calculation unit 108 calculates the amount of fluctuation in the environmental load value from the calculated environmental load value A and environmental load value B, and adds the first additional fluctuation amount to the third additional fluctuation amount to this amount of fluctuation in the environmental load value to calculate the amount of fluctuation in the environmental load value in the optical component manufacturing compared with the optical component manufacturing conditions by given polymerization. The calculation unit 108 also multiplies the calculated amount of fluctuation in the environmental load value by a predetermined value to calculate a fluctuation token. At this time, if the amount of fluctuation in the environmental load value in the optical component manufacturing indicates a reduction in the environmental load value, a positive fluctuation token is calculated. On the other hand, if the amount of fluctuation in the environmental load value in the optical component manufacturing indicates an increase in the environmental load value, a negative fluctuation token is calculated.

The manufacturing condition determination unit 110 determines manufacturing conditions for the manufacture of the optical member based on the calculated variable token so that the variable token becomes equal to or greater than a given value.
Specifically, when the calculated variable token is less than a given value, the manufacturing condition determination unit 110 changes the manufacturing conditions for the optical component manufacturing so as to increase the variable token, i.e., so as to reduce the environmental load value.
For example, the production conditions are changed by lowering the viscosity of the polymerizable composition for optical materials in the stirring section to within an appropriate range and by raising the temperature in the stirring section to within an appropriate range, as described below. Generally, increasing the viscosity reduces the energy and time required for polymerization, thereby lowering the environmental load value, but may result in a decrease in the optical quality of the optical member, which is the polymerized product, and therefore appropriate conditions are set by taking into consideration the balance with the yield of optical quality.

<Method for manufacturing optical components>
Next, a manufacturing method for the optical member is described. The manufacturing method for the optical member is a method for manufacturing an optical material using a polymerizable composition for an optical material containing two or more different monomers for an optical material and a polymerization catalyst, and includes a preparation step of preparing a first raw material composition and a second raw material composition, a shearing step of applying a shearing force to the first raw material composition and the second raw material composition to manufacture the polymerizable composition for an optical material, a stirring step of applying a stirring force to the polymerizable composition for an optical material, a casting step of casting the polymerizable composition for an optical material into a mold after the stirring step, and a curing step of curing the polymerizable composition for an optical material by polymerizing the two or more different monomers for an optical material in the polymerizable composition for an optical material in the mold.
"Applying a shear force to the first raw material composition and the second raw material composition" means applying a force to the first raw material composition and the second raw material composition in a direction mainly intersecting the flow direction while causing the first raw material composition and the second raw material composition to flow.
"Applying a stirring force to the polymerizable composition for an optical material" means applying a force to the polymerizable composition for an optical material mainly in a direction approximately parallel to and opposite to the flow direction (i.e., the direction from the inlet to the outlet on an imaginary line connecting the portion (inlet) where the composition enters the process of applying the stirring force and the portion (outlet) where the composition exits) while causing the polymerizable composition for an optical material to flow, or stopping the flow and stirring the polymerizable composition for an optical material.

The method for producing an optical member according to the present disclosure includes the steps described above, and thus can suppress U-shaped striae in the obtained optical material.
U-shaped striae are likely to occur after a certain amount of time has passed since the polymerizable composition for an optical material was cast into a mold.
From the viewpoint of suppressing U-shaped striae, the present inventors have focused on the step of shearing and stirring the first raw material composition and the second raw material composition.
Furthermore, as a result of continuing to study the manner and order of shearing and stirring, the inventors have found that by having the manufacturing method for producing optical components according to the present disclosure have the above-mentioned configuration including the shearing step and the stirring step, it is possible to suppress U-shaped striae in the obtained optical material.

The polymerizable composition for an optical material in the present disclosure contains two or more different monomers for an optical material and a polymerization catalyst.
The polymerizable composition for an optical material is produced by applying a shear force to the first raw material composition and the second raw material composition.
Therefore, the first raw material composition and the second raw material composition as a whole, including the first raw material composition and the second raw material composition, contain two or more different types of monomers for optical materials and a polymerization catalyst.
For example, the first raw material composition and the second raw material composition may each contain different types of monomers for optical materials, and at least one of the first raw material composition and the second raw material composition may contain a polymerization catalyst.

<Preparation process>
The preparation step is a step of preparing a first raw material composition and a second raw material composition.

In the preparation step, the first raw material composition and the second raw material composition are not particularly limited as long as they contain two or more different types of monomers for optical materials and a polymerization catalyst as a whole.
The first raw material composition and the second raw material composition may each be a ready-made product, or may be prepared by mixing a monomer for an optical material with a polymerization catalyst.
The method for the above mixing is not particularly limited, and any known method can be used.

The temperature at which the above components are mixed is not particularly limited, but is preferably 30° C. or lower, and more preferably room temperature (25° C.) or lower.
From the viewpoint of the pot life of the prepared polymerizable composition for an optical material, it may be preferable to set the temperature at a temperature lower than 25° C. However, when the solubility of the additives such as the internal mold release agent and each of the above components is not good, the temperature of each of the above components may be raised in advance to dissolve the additives in each of the above components.

When mixing the above components, it is preferable to do so under a dry inert gas to prevent moisture from being mixed into the polymerizable composition for optical materials.

In the preparation step, a polymerization catalyst is preliminarily mixed with a part of the two or more different monomers for optical materials, and then the remaining part of the two or more different monomers for optical materials may be mixed in a single batch or in multiple batches.
Specific examples of the preparation step include the following.

First, a part of the monomer for optical material and an additive (e.g., an internal mold release agent) are charged to prepare a mixed solution. The mixed solution is stirred at 25°C for 1 hour to completely dissolve each component, and then a part of the remaining monomer for optical material is charged and stirred to obtain a homogeneous solution. The solution is degassed to obtain a first raw material composition.
The remaining part of the monomer for optical materials and the catalyst are then stirred at 25° C. for 30 minutes to completely dissolve them into a homogeneous solution, which is then degassed to obtain a second raw material composition.

<Shearing process>
The shearing step is a step of applying a shear force to the first raw material composition and the second raw material composition to produce a polymerizable composition for an optical material.
In this disclosure, a force applied in a direction perpendicular to the flow direction is also referred to as a shear force.
In this disclosure, applying a force primarily in a direction transverse to the flow direction is also referred to as "shearing."

"To make the composition flow" means, for example, to transfer the composition from a tank to a power mixer, or from a power mixer to a mixing tank, thereby causing the composition to flow.

During shearing, the flow rate of the first raw material composition and the second raw material composition is preferably 3 g/s or more, more preferably 6 g/s or more, and even more preferably 9 g/s or more, from the viewpoint of increasing productivity while suppressing an increase in the viscosity of the polymerizable composition for an optical material.
When shearing, the flow rate of the first raw material composition and the second raw material composition is preferably 45 g/s or less, more preferably 40 g/s or less, and even more preferably 35 g/s or less, from the viewpoint of suppressing U-shaped striae in the polymerizable composition for an optical material.

There are no particular limitations on the method for applying force to the first raw material composition and the second raw material composition in a direction intersecting the flow direction. For example, a method using a power mixer can be mentioned as one such method.

The rotation speed in the shearing step is preferably 200 rpm or more, more preferably 400 rpm or more, and even more preferably 500 rpm or more.
The rotation speed in the shearing step is preferably 3000 rpm or less, more preferably 2500 rpm or less, and even more preferably 2000 rpm or less.

<Polymerizable composition for optical materials>
The polymerizable composition for an optical material is produced by applying a shear force to the first raw material composition and the second raw material composition.
The polymerizable composition for an optical material contains two or more different monomers for an optical material and a polymerization catalyst.

(Monomer for optical materials)
Examples of monomers for optical materials include isocyanate compounds, polythiol compounds having two or more mercapto groups, hydroxythiol compounds having one or more mercapto groups and one or more hydroxyl groups, polyol compounds having two or more hydroxyl groups, and amine compounds.

The two or more different optical material monomers preferably include an isocyanate compound (A) and an active hydrogen compound (B) which is at least one selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound having one or more mercapto groups and one or more hydroxyl groups, a polyol compound having two or more hydroxyl groups, and an amine compound.

[Isocyanate compound (A)]
The isocyanate compound (A) may be an aliphatic isocyanate compound, an alicyclic isocyanate compound, an aromatic isocyanate compound, a heterocyclic isocyanate compound, or the like, and may be used alone or in combination of two or more. These isocyanate compounds may include dimers, trimers, and prepolymers. Examples of these isocyanate compounds include the compounds exemplified in International Publication No. 2011/055540.
In the present disclosure, the alicyclic isocyanate compound refers to an isocyanate compound that includes an alicyclic structure and may include a heterocyclic structure. The aromatic isocyanate compound refers to an isocyanate compound that includes an aromatic structure and may include an alicyclic structure and a heterocyclic structure. The heterocyclic isocyanate compound refers to an isocyanate compound that includes a heterocyclic structure and does not include an alicyclic structure or an aromatic structure.

The isocyanate compound (A) preferably contains at least one selected from an aliphatic isocyanate compound, an alicyclic isocyanate compound, an aromatic isocyanate compound, and a heterocyclic isocyanate compound, and more preferably contains at least one of an alicyclic isocyanate compound and an aromatic isocyanate compound.

In the present disclosure, from the viewpoints of suppressing striae in the optical material and shortening the production time of the optical member, it is preferable that the isocyanate compound (A) includes at least one selected from 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, m-xylylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, dicyclohexylmethane diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, 1,4-bis(isocyanatomethyl)cyclohexane, isophorone diisocyanate, 1,6-hexamethylene diisocyanate, and 1,5-pentamethylene diisocyanate;
More preferably, the isocyanate-containing copolymer contains at least one selected from the group consisting of 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, m-xylylene diisocyanate, dicyclohexylmethane diisocyanate, and 1,3-bis(isocyanatomethyl)cyclohexane;
It is more preferable that the organic solvent contains at least one selected from m-xylylene diisocyanate, 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, and 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane.

[Active hydrogen compounds]
Examples of the active hydrogen compound include a polythiol compound having two or more mercapto groups, a hydroxythiol compound having one or more mercapto groups and one or more hydroxyl groups, a polyol compound having two or more hydroxyl groups, and an amine compound.
As the active hydrogen compound, oligomers of the above active hydrogen compounds and halogen-substituted products (for example, chlorine-substituted products, bromine-substituted products, etc.) of the above active hydrogen compounds may be used.
The active hydrogen compounds may be used alone or in combination of two or more.

(Polythiol Compound Having Two or More Mercapto Groups)
The polythiol compound is a compound having two or more mercapto groups, and examples of the compounds exemplified in WO 2016/125736 can be mentioned.
In the present disclosure, from the viewpoint of suppressing striae in an optical material and shortening the manufacturing time of an optical member, the polythiol compound is selected from the group consisting of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, pentaerythritol, and the like. It is preferable that the mercaptoether compound contains at least one selected from the group consisting of thritol tetrakis(3-mercaptopropionate), bis(mercaptoethyl)sulfide, pentaerythritol tetrakis(2-mercaptoacetate), 2,5-bis(mercaptomethyl)-1,4-dithiane, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, and 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithietane,
more preferably, the monomer comprises at least one selected from 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, pentaerythritol tetrakis(3-mercaptopropionate), pentaerythritol tetrakis(2-mercaptoacetate), and 2,5-bis(mercaptomethyl)-1,4-dithiane;
It is more preferable that the monomer contains at least one selected from 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and pentaerythritol tetrakis(3-mercaptopropionate).

(Hydroxythiol compound having one or more mercapto groups and one or more hydroxyl groups)
Examples of thiol compounds having a hydroxy group include 2-mercaptoethanol, 3-mercapto-1,2-propanediol, glycerin bis(mercaptoacetate), 4-mercaptophenol, 2,3-dimercapto-1-propanol, pentaerythritol tris(3-mercaptopropionate), pentaerythritol tris(thioglycolate), and the like, but are not limited to these exemplary compounds.

(Polyol Compound Having Two or More Hydroxyl Groups)
The polyol compound may be one or more aliphatic or alicyclic alcohols. Specific examples include linear or branched aliphatic alcohols, alicyclic alcohols, and alcohols obtained by adding at least one selected from the group consisting of ethylene oxide, propylene oxide, and ε-caprolactone to these alcohols. More specific examples include the compounds exemplified in WO 2016/125736.

The polyol compound is preferably at least one selected from ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, 1,2-cyclopentanediol, 1,3-cyclopentanediol, 1,2-cyclohexanediol, 1,3-cyclohexanediol, and 1,4-cyclohexanediol.

(Amine Compound)
Examples of the amine compound include ethylenediamine, 1,2- or 1,3-diaminopropane, 1,2-, 1,3- or 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diaminooctane, 1,10-diaminodecane, 1,2-, 1,3- or 1,4-diaminocyclohexane, o-, m- or p-diaminobenzene, 3,4- or 4,4'-diaminobenzophenone, 3,4- or 4,4'-diaminodiphenyl ether, 4,4'-diaminodiphenylmethane, 4,4'-diaminodiphenyl sulfide, 3,3' or primary polyamine compounds such as 4,4'-diaminodiphenylsulfone, 2,7-diaminofluorene, 1,5-, 1,8-, or 2,3-diaminonaphthalene, 2,3-, 2,6-, or 3,4-diaminopyridine, 2,4- or 2,6-diaminotoluene, m- or p-xylylenediamine, isophoronediamine, diaminomethylbicycloheptane, 1,3- or 1,4-diaminomethylcyclohexane, 2- or 4-aminopiperidine, 2- or 4-aminomethylpiperidine, 2- or 4-aminoethylpiperidine, N-aminoethylmorpholine, and N-aminopropylmorpholine;
Monofunctional secondary amine compounds such as diethylamine, dipropylamine, di-n-butylamine, di-sec-butylamine, diisobutylamine, di-n-pentylamine, di-3-pentylamine, dihexylamine, dioctylamine, di(2-ethylhexyl)amine, methylhexylamine, diallylamine, N-methylallylamine, piperidine, pyrrolidine, diphenylamine, N-methylamine, N-ethylamine, dibenzylamine, N-methylbenzylamine, N-ethylbenzylamine, dicyclohexylamine, N-methylaniline, N-ethylaniline, dinaphthylamine, 1-methylpiperazine, and morpholine;
N,N'-dimethylethylenediamine, N,N'-dimethyl-1,2-diaminopropane, N,N'-dimethyl-1,3-diaminopropane, N,N'-dimethyl-1,2-diaminobutane, N,N'-dimethyl-1,3-diaminobutane, N,N'-dimethyl-1,4-diaminobutane, N,N'-dimethyl-1,5-diaminopentane, N,N'-dimethyl-1,6-diaminohexane, N,N'-dimethyl-1,7-diaminoheptane, N,N'-diethylethylenediamine, N,N'-diethyl-1,2-diaminopropane, N,N'-diethyl-1,3-diaminopropane, N,N'-diethyl-1,2-diamino Nobutane, N,N'-diethyl-1,3-diaminobutane, N,N'-diethyl-1,4-diaminobutane, N,N'-diethyl-1,5-diaminopentane, N,N'-diethyl-1,6-diaminohexane, N,N'-diethyl-1,7-diaminoheptane, piperazine, 2-methylpiperazine, 2,5-dimethylpiperazine, 2,6-dimethylpiperazine, homopiperazine, 1,1-di-(4-piperidyl)methane, 1,2-di-(4-piperidyl)ethane, 1,3-di-(4-piperidyl)propane, 1,4-di-(4-piperidyl)butane, tetramethylguanidine and other secondary polyamine compounds; and the like.

Among the above, the active hydrogen compound (B) preferably contains a polythiol compound having two or more mercapto groups.
The content of the polythiol compound having two or more mercapto groups is preferably 60 mass% or more, more preferably 70 mass% or more, and even more preferably 80 mass% or more, based on the total mass of the active hydrogen compound (B).

In addition, in the active hydrogen compound (B) of the present disclosure, the total content of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane and pentaerythritol tetrakis(3-mercaptopropionate) is preferably 60% by mass or more, more preferably 70% by mass or more, and even more preferably 80% by mass or more, based on the total mass of the active hydrogen compound (B).

In the composition, the molar ratio (NCO groups/(OH groups+SH groups)) of the sum of the hydroxyl groups (OH groups) and mercapto groups (SH groups) in the active hydrogen compound to the isocyanate groups (NCO groups) in the isocyanate compound (A) is preferably 0.8 to 1.2, more preferably 0.85 to 1.15, and even more preferably 0.9 to 1.1.

a viscosity Va of the first raw material composition measured using a Brookfield viscometer at 25° C. and 60 rpm (revolutions per minute);
From the viewpoint of suppressing U-shaped striae in the obtained optical material, the absolute value V of the difference between the viscosity Vb of the second raw material composition measured with a Brookfield viscometer under conditions of 25° C. and 60 rpm (also referred to as viscosity difference V) is preferably 1500 mPa·s or less, more preferably 1000 mPa·s or less, even more preferably 500 mPa·s or less, and particularly preferably 300 mPa·s or less.
Although the viscosity may be increased in order to shorten the polymerization time, in the present disclosure, for example, even if V is 10 mPa·s or more, the optical quality of the optical material can be maintained at a good level.
From the above viewpoint, the viscosity difference V may be 20 mPa·s or more, or 100 mPa·s or more.
Va is the viscosity of the first feed composition before the application of shear force, and Vb is the viscosity of the second feed composition before the application of shear force.

The viscosity Va of the first raw material composition measured with a Brookfield viscometer at 25°C and 60 rpm is preferably in the range of 10 mPa·s to 2000 mPa·s, more preferably in the range of 50 mPa·s to 1500 mPa·s, and even more preferably in the range of 100 mPa·s to 1000 mPa·s.

In the method for producing an optical member according to the present disclosure, it is preferable that the first raw material composition contains at least one compound selected from the group consisting of polyisocyanate compounds, epoxy compounds, and epithio compounds.

It is also preferable that the second raw material composition contains at least one active hydrogen compound selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound containing one or more mercapto groups and one or more hydroxyl groups, a polyol compound containing two or more hydroxyl groups, and an amine compound.

<Polymerization catalyst>
The polymerization catalyst is not particularly limited, but for example, a basic catalyst, an organometallic catalyst, zinc carbamate, ammonium salt, sulfonic acid, etc. can be used.
The polymerization catalysts may be used alone or in appropriate combination of two or more.

(Basic Catalyst)
Examples of the basic catalyst include amine-based catalysts and imidazole-based catalysts.
Specific examples of the catalyst include tertiary amine catalysts such as triethylenediamine, N,N-dimethylethanolamine, triethylamine, and N-ethylmorpholine, 2-methylpyrazine, pyridine, α-picoline, β-picoline, γ-picoline, 2,6-lutidine, 3,5-lutidine, 2,4,6-collidine, 3-chloropyridine, N,N-diethylaniline, N,N-dimethylaniline, hexamethylenetetramine, quinoline, isoquinoline, N,N-dimethyl-p-toluidine, N,N-dimethylpiperazine, quinaldine, 4-methylmorpholine, triallylamine, trioctylamine, 1.2-dimethylimidazole, and 1-benzyl-2-methylimidazole.

Among the above, the basic catalyst is preferably an amine catalyst.
Examples of the amine catalyst include tertiary amine catalysts such as 3,5-lutidine, 2,4,6-collidine, triethylenediamine, N,N-dimethylethanolamine, triethylamine, and N-ethylmorpholine.

The amine catalyst preferably contains at least one selected from 3,5-lutidine, 2,4,6-collidine, triethylenediamine, N,N-dimethylethanolamine, triethylamine, and N-ethylmorpholine.

It is also preferable that the basic catalyst contains a compound represented by the following general formula (2) and/or a compound represented by the following general formula (3).

In the general formula (2), R ₁ represents a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, or a halogen atom, and a plurality of R _1s may be the same or different. Q represents a carbon atom or a nitrogen atom. m represents an integer of 0 to 5.

In the general formula (3), R ₂ , R ₃ and R ₄ each independently represent a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, or an allyl group.

The basic catalyst preferably has a pKa value of 1 to 9, more preferably 3 to 8, and even more preferably 4 to 8.

The pKa value (acid dissociation index) can be measured, for example, by (a) the method described in The Journal of Physical Chemistry, vol. 68, number 6, page 1560 (1964), (b) a method using an automatic potentiometric titrator (AT-610 (product name), etc.) manufactured by Kyoto Electronics Manufacturing Co., Ltd., or (c) the acid dissociation index described in Chemistry Handbook compiled by the Chemical Society of Japan (Revised 3rd Edition, June 25, 1984, published by Maruzen Co., Ltd.).

(organometallic catalyst)
Examples of the organometallic catalyst include organotin catalysts; organic acid salts of iron, nickel, zinc, or the like; acetylacetonate complexes; catalyst compositions comprising a metal carboxylate compound and a quaternary ammonium salt compound; catalyst compositions comprising a bicyclic tertiary amine compound and a quaternary ammonium salt compound; and metal catalysts in which an alkoxy group, a carboxy group, or the like is coordinated to titanium or aluminum.
Of the above organometallic catalysts, organotin catalysts are preferred.
Examples of the organotin catalyst include dibutyltin dichloride (DBC), dimethyltin dichloride (DMC), dibutyltin dilaurate (DBTDL), and dibutyltin diacetate.

It is preferable that the organotin catalyst contains at least one selected from dibutyltin dichloride, dimethyltin dichloride, dibutyltin dilaurate, and dibutyltin diacetate.

The polymerization catalyst preferably contains at least one selected from the group consisting of a basic catalyst having a pKa value of 4 to 8 and an organometallic catalyst.

It is also preferable that the polymerization catalyst contains at least one selected from an amine-based catalyst and an organotin-based catalyst.

The polymerization catalyst preferably contains at least one selected from the group consisting of 3,5-lutidine, 2,4,6-collidine, triethylenediamine, N,N-dimethylethanolamine, triethylamine, N-ethylmorpholine, dibutyltin dichloride, dimethyltin dichloride, dibutyltin dilaurate, and dibutyltin diacetate.

In the preparation step, a total of 100 parts by mass of two or more different types of monomers for optical materials and 0.010 parts by mass to 2.0 parts by mass of a polymerization catalyst are prepared.
That is, the manufacturing method for producing an optical member according to the present disclosure uses 0.010 parts by mass to 2.0 parts by mass of a polymerization catalyst per 100 parts by mass in total of two or more different monomers for optical materials.
As described above, the amount of the polymerization catalyst used in the present disclosure is large compared to the conventional methods for producing optical members.
This allows the reaction heat of the polymerizable composition for optical materials to be generated in a short time when the monomer for optical materials in the polymerizable composition for optical materials is polymerized in the curing step. By further utilizing this reaction heat for polymerization, the polymerization reaction can be favorably promoted, and a high-quality optical material with suppressed striae can be obtained in a shorter time than before.

By using 0.010 parts by mass or more of the polymerization catalyst per 100 parts by mass of two or more different monomers for optical materials, the polymerization reaction can be favorably promoted, and therefore a high-quality optical material with suppressed striae can be obtained in a short time. In addition, by favorably promoting the polymerization reaction, the releasability when removing the cured product from the mold can be improved.
From the above viewpoints, the polymerization catalyst is preferably used in an amount of 0.015 parts by mass or more, more preferably 0.038 parts by mass or more, even more preferably 0.10 parts by mass or more, and particularly preferably 0.17 parts by mass or more, per 100 parts by mass of the two or more different monomers for optical materials.

The range of the content of the polymerization catalyst described above may be appropriately changed depending on the types of the monomer for an optical material and the polymerization catalyst.
For example, in the case where the monomers for optical materials include 2,5(6)-bis(isocyanatomethyl)-bicyclo-[2.2.1]-heptane, pentaerythritol tetrakis(3-mercaptopropionate), and 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, and the polymerization catalyst includes 3,5-lutidine, the polymerization catalyst is preferably used in an amount of 0.10 part by mass or more, and more preferably 0.17 part by mass or more, per 100 parts by mass of the two or more different monomers for optical materials.

For example, when the optical material monomers include m-xylylene diisocyanate, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and the polymerization catalyst includes 3,5-lutidine, it is preferable to use 0.015 parts by mass or more of the polymerization catalyst, and more preferably 0.020 parts by mass or more, per 100 parts by mass of two or more different optical material monomers.

For example, when the optical material monomer contains m-xylylene diisocyanate and 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, and the polymerization catalyst contains 3,5-lutidine, it is preferable to use 0.010 parts by mass or more of the polymerization catalyst, and more preferably 0.015 parts by mass or more, per 100 parts by mass of two or more different optical material monomers.

For example, when the optical material monomer contains dicyclohexylmethane diisocyanate and a mixture of 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and the polymerization catalyst contains 3,5-lutidine, it is preferable to use 1.0 part by mass or more of the polymerization catalyst, and more preferably 1.5 parts by mass or more, per 100 parts by mass of two or more different optical material monomers.

For example, when the optical material monomers include 1,3-bis(isocyanatemethyl)cyclohexane, pentaerythritol tetrakis(2-mercaptoacetate) and 2,5-bis(mercaptomethyl)-1,4-dithiane, and the polymerization catalyst includes 3,5-lutidine, it is preferable to use 0.03 parts by mass or more of the polymerization catalyst, and more preferably 0.07 parts by mass or more, per 100 parts by mass of two or more different optical material monomers.

By using 2.0 parts by mass or less of a polymerization catalyst per 100 parts by mass of two or more different monomers for an optical material, it is possible to improve the handleability, for example, when injecting the polymerizable composition for an optical material into a mold.
From the above viewpoint, it is preferable to use 1.5 parts by mass or less of the polymerization catalyst per 100 parts by mass of two or more different monomers for optical materials.
Depending on the types of the monomer for an optical material and the polymerization catalyst, the polymerization catalyst may be used in an amount of 1.0 part by mass or less, 0.3 part by mass or less, or 0.15 part by mass or less per 100 parts by mass of two or more different monomers for an optical material.

The amount of the polymerization catalyst can be appropriately set depending on the type of polymerization catalyst, the type and amount of monomers used (isocyanate compounds, active hydrogen compounds, other components, etc.), and the shape of the desired molded product.

The polymerization catalyst preferably satisfies the following condition 1.
[Condition 1]
-Ea/R is -7100 or more and -2900 or less.
(Ea is the activation energy calculated by Arrhenius plot from the reaction rate constants of the two or more different monomers for optical materials at two or more different temperatures, and R is the gas constant (8.314 J/mol/K).)

When the polymerization catalyst satisfies condition 1, it is possible to suppress the variation in the polymerization rate during the polymerization and curing process of the polymerizable composition, and as a result, the occurrence of optical distortion and striae is suppressed, and an optical material with excellent appearance can be obtained.

The value of Ea is calculated by the following method.
a physical property acquisition step of acquiring a physical property value 1a derived from a functional group of the polymerizable reactive compound before heating and a physical property value 1b derived from a remaining functional group after heating for a predetermined period of time when a composition 1 containing a polymerizable reactive compound and a predetermined amount of a polymerization catalyst is heated and maintained at a plurality of temperatures;
a residual functional group ratio calculation step of calculating a residual functional group ratio 1 at each of the temperatures from the physical property value 1a and the physical property value 1b;
a reaction rate constant calculation step of calculating a reaction rate constant 1 at a plurality of temperatures based on a reaction rate equation from the residual functional group ratio 1;
A fitting step of calculating an activation energy Ea1 and a frequency factor A1 by an Arrhenius plot from the reaction rate constants 1 at a plurality of temperatures;
The value of Ea is calculated by performing the above.
Using the calculated Ea, it is determined whether the polymerization catalyst satisfies condition 1.
Specific aspects of the method for calculating the value of Ea and the method for determining whether the polymerization catalyst satisfies condition 1 are the same as the specific aspects described in WO 2020/256057.

<Mixing process>
The stirring step is a step of applying a stirring force to the polymerizable composition for an optical material.
In the present disclosure, the force applied in a direction substantially parallel to the flow direction is also referred to as a stirring force.

When applying a force in a direction substantially parallel to the flow direction, the preferred range of the flow speed of the polymerizable composition for optical materials is the same as the preferred range of the flow speed of the polymerizable composition for optical materials in the above-mentioned <shearing step>.

There are no particular limitations on the method for applying force to the polymerizable composition for optical materials in a direction approximately parallel to the flow direction. For example, one such method is to use a stirring tank containing a stirrer.

The rotation speed in the stirring step is preferably 50 rpm or more, more preferably 100 rpm or more, and even more preferably 200 rpm or more.
The rotation speed in the stirring step is preferably 1000 rpm or less, more preferably 800 rpm or less, and even more preferably 600 rpm or less.

The method for producing an optical member according to the present disclosure includes a shearing step and a stirring step, and thus can continuously produce a uniform polymerizable composition for optical materials from the viewpoint of suppressing U-shaped striae in the resulting optical material.

The method for producing an optical member according to the present disclosure preferably includes a shearing step and a stirring step in this order, from the viewpoint of suppressing U-shaped striae in the obtained optical material.
That is, the method for producing an optical member according to the present disclosure is a method for producing an optical material using a polymerizable composition for optical materials containing two or more different monomers for optical materials and a polymerization catalyst, and preferably includes, in this order, a preparation step of preparing a first raw material composition and a second raw material composition, a shearing step of applying a shearing force to the first raw material composition and the second raw material composition to produce the polymerizable composition for optical materials, a stirring step of applying a stirring force to the polymerizable composition for optical materials, and, after the stirring step, a casting step of casting the polymerizable composition for optical materials into a mold, and a curing step of curing the polymerizable composition for optical materials by polymerizing the two or more different monomers for optical materials in the polymerizable composition for optical materials in the mold.

<Filtration process>
The method for producing an optical member according to the present disclosure may further include a filtration step of filtering the polymerizable composition for an optical material.
The filtration step can be carried out using a filter.
As the filter, for example, a capsule filter can be used.
The filtration accuracy of the filter is preferably 1.0 μm to 4.5 μm.

<Second stirring step>
The method for producing an optical member according to the present disclosure may further include a second stirring step of stirring the polymerizable composition for an optical material, in addition to the above steps.
The second stirring step is a step for further stirring the polymerizable composition for an optical material in addition to the above-mentioned shearing step and stirring step.
When the second stirring step is performed, the stirring step described in the above <Stirring Step> is also referred to as the first stirring step.
In the second stirring step, examples of a method for stirring the polymerizable composition for an optical material include a method using a static mixer.

When a static mixer is used, the inner diameter φ of the static mixer is preferably 5 to 8 mm, and more preferably 6 to 8 mm.
When a static mixer is used, the number of elements of the static mixer is preferably 16 to 48, and more preferably 24 to 48.

<Casting process>
The casting step is a step of casting the polymerizable composition for an optical material into a mold after the first or second stirring step.
The viscosity of the polymerizable composition for optical materials in the casting step, measured with a Brookfield viscometer at 25° C. and 60 rpm, is preferably 10 mPa·s to 1000 mPa·s.
The casting step is preferably a step of adjusting the viscosity of the polymerizable composition for an optical material to 10 mPa·s to 1000 mPa·s as measured with a Brookfield viscometer under conditions of 25° C. and 60 rpm, and casting the composition into a mold.
By adjusting the viscosity of the polymerizable composition for an optical material to be within the above range and casting the composition, the viscosity of the polymerizable composition for an optical material can be kept within an appropriate range, and striae can be suppressed in the obtained optical material.

From the above viewpoints, the viscosity of the polymerizable composition for optical materials in the casting step is preferably 10 mPa·s or more, more preferably 40 mPa·s or more, even more preferably 70 mPa·s or more, particularly preferably 80 mPa·s or more, even more preferably 100 mPa·s or more, and even more preferably 120 mPa·s or more.
The viscosity of the polymerizable composition for an optical material in the casting step is preferably 1000 mPa·s or less, more preferably 700 mPa·s or less, and even more preferably 400 mPa·s or less, from the viewpoint of maintaining good handleability when molding the optical material into a desired shape.

The method for adjusting the viscosity of the polymerizable composition for an optical material is not particularly limited.
For example, the viscosity of the polymerizable composition for an optical material may be adjusted by a method such as adding a high-viscosity compound, heating, or stirring.

The casting process may be a process of casting the polymerizable composition for optical materials into a mold by a multi-axis method. It may also be a process of casting the polymerizable composition for optical materials into a mold by a mixing method just before casting.

In the casting process, the casting method may be manual casting or automatic casting by machine.
The automatic casting method may be pressure-feeding with nitrogen, or liquid delivery by a pump (such as a diaphragm pump or a gear pump).

In the casting step, it is preferable to apply pressure (for example, back pressure) to the polymerizable composition for an optical material using nitrogen or the like to cast the polymerizable composition for an optical material into the mold.
This makes it possible to more preferably cast the polymerizable composition for an optical material into the mold by a multi-screw method.

<Curing process>
The curing step is a step of curing the polymerizable composition for an optical material by polymerizing the two or more different monomers for an optical material in the polymerizable composition for an optical material in the mold.
When the method for producing an optical member according to the present disclosure includes a curing step, the polymerizable composition for an optical material can be polymerized, and an optical material can be produced.

The polymerization method is not particularly limited, and may be a method in which a polymerization reaction is caused by heating using a known method.
For example, the polymerizable composition may be poured into a mold (casting die) held by a gasket or tape, and the temperature may be gradually increased while heating to promote the polymerization reaction. In this case, depending on the physical properties required for the optical material to be obtained, it is preferable to perform a degassing treatment under reduced pressure, or a filtration treatment under pressure or reduced pressure, etc., as necessary.

The polymerization method may be a method in which the polymerization reaction is carried out without heating.
That is, in the curing step in the present disclosure, the polymerizable composition for an optical material may be allowed to stand to cure by polymerization.

The environment in which the curing step is performed is not particularly limited, and the mold can be heated from outside the mold for curing. However, from the viewpoint of polymerizing in a short time while improving optical quality such as striae, it is preferable that the curing step is a step in which the polymerizable composition for an optical material is allowed to stand in a closed space to cure the polymerizable composition for an optical material.
By leaving the polymerizable composition for an optical material in a closed space, it is possible to prevent the heat generated by the self-heating of the polymerizable composition for an optical material from being released to the outside. This makes it possible to retain the heat generated by the self-heating in the closed space, so that the polymerization reaction can be promoted more efficiently and the optical material can be produced in a shorter time.
An example of a closed space is an insulated environment.
The term "insulating environment" refers to an environment in which heat is retained inside and heat conduction between the inside and the outside is suppressed. The term "environment in which heat conduction between the inside and the outside is suppressed" refers to an environment in which, when the polymerizable composition for an optical material is left stationary in a closed space, the heat conductivity between the inside and the outside of the closed space is at a level that allows the polymerizable composition for an optical material to be cured.

The insulating environment can be created, for example, using insulating materials.
That is, by placing the polymerizable composition for an optical material at rest in a heat-insulating container made of a heat-insulating material, heat can be retained inside the heat-insulating container, and heat conduction between the inside and the outside can be suppressed.

The thermal conductivity of the insulating material is preferably 0.50 W/mK or less, more preferably 0.10 W/mK or less, and even more preferably 0.05 W/mK or less.

The density of the insulating material is preferably 10 kg/m ³ or more, more preferably 15 kg/m ³ or more, and even more preferably 20 kg/m ³ or more.

In the "insulation" or "insulation environment" of the present disclosure, it is preferable to perform heating to make the adiabatic reaction tank a constant temperature state (constant temperature reaction tank) within a range that does not interfere with the polymerization reaction of the polymerizable composition for optical materials due to reaction heat or does not excessively promote the polymerization reaction of the polymerizable composition for optical materials due to external heating.
This allows the environmental temperature inside the reaction tank (constant temperature reaction tank) in which the mold is placed to be kept warm or at a constant temperature depending on the temperature rise caused by the self-heating of the monomer for optical material, etc., and therefore makes it possible to more effectively promote the polymerization reaction.

As the adiabatic environment, for example, an adiabatic reactor or a constant temperature reactor as described above can be used.
For example, in the case where a mold into which a monomer has been injected is placed in a vacuum container that is an adiabatic reaction vessel, adiabatic polymerization in an adiabatic environment using the adiabatic reaction vessel (constant temperature reaction vessel) can be carried out by the following procedure.
The inside surface of the vacuum vessel is covered with a material having heat insulating and heat retaining properties such as urethane foam or cork, and the mold into which the monomer has been injected is wrapped with a material such as a rag if necessary. Then, the mold into which the monomer has been injected is left to stand in the vacuum vessel.

The curing step may be a step of curing the polymerizable composition for an optical material by leaving the polymerizable composition for an optical material at rest without heating from the outside.
As described above, in the present disclosure, it is not necessarily necessary to heat the polymerizable composition for an optical material.
In order to apply external heating, a device may be used, which may increase the economic burden, but if a method that does not apply external heating is used, the optical material can be produced in a simple manner, which reduces the economic burden.

The curing step is preferably a step of curing the polymerizable composition for an optical material by leaving the polymerizable composition for an optical material at rest for 2 hours to 10 hours.
In the curing step, it is more preferable to leave the polymerizable composition for an optical material at rest for 8 hours or less.
From the viewpoint of carrying out a polymerization reaction to obtain a well-cured optical material, the polymerizable composition for an optical material is preferably left to stand for 2 hours or more, and more preferably left to stand for 3 hours or more.

In the curing step, if necessary, a microwave irradiation step may be provided in which microwaves are irradiated onto the polymerizable composition for optical materials for a predetermined period of time.

One embodiment of the curing step includes the following steps a and b.
Step a: A polymerizable composition for an optical material is injected (cast) into a casting mold (into a cavity of a mold).
Step b: The mold into which the polymerizable composition for optical materials has been injected is left to stand in a closed space for a predetermined period of time to allow adiabatic polymerization.

(Step a)
First, the polymerizable composition is injected into a mold (casting die) held by a gasket or tape, etc. At this time, depending on the physical properties required for the resulting optical material, it is preferable to perform a degassing treatment under reduced pressure, a filtration treatment under pressure or reduced pressure, etc., as necessary.

(Step b)
The polymerization conditions are not limited, but are preferably adjusted appropriately depending on the composition of the polymerizable composition for optical materials, the type and amount of catalyst used, the shape of the mold, and the like.
The mold into which the polymerizable composition for an optical material has been poured may be left to stand in an insulated environment for 2 to 4 hours to polymerize the composition.

In the step b, if necessary, a heating step may be added after the adiabatic polymerization process in which the mold into which the polymerizable composition for an optical material has been injected is left standing in an adiabatic environment for a certain period of time.
In step b, if necessary, in parallel with the step of leaving the mold into which the polymerizable composition for an optical material has been injected in an adiabatic environment (adiabatic polymerization), the mold into which the polymerizable composition for an optical material has been injected may be heated continuously or intermittently at a temperature not exceeding the self-heat generated by the polymerizable composition for an optical material in the adiabatic polymerization process, or the inside of the adiabatic reaction tank may be heated to maintain the environmental temperature in the adiabatic reaction tank.

<Annealing step>
The method for producing an optical member according to the present disclosure may include an annealing step of annealing the cured polymerizable composition for an optical material, as necessary.
The temperature at which the annealing treatment is carried out is usually 50 to 150°C, preferably 90 to 140°C, and more preferably 100 to 130°C.

<Applications of optical materials>
The optical material produced by the method for producing an optical member according to the present disclosure can be used for plastic lenses, prisms, optical fibers, information recording substrates, filters, light-emitting diodes, and the like.
Among the above, the optical material can be suitably used for plastic lenses, and more suitably used for plastic lenses for spectacles.

<Optical component manufacturing system>
The optical member production system of the present disclosure is a system for producing an optical member by polymerizing a polymerizable composition for an optical material, which contains two or more different types of monomers for an optical material and a polymerization catalyst,
An environmental load value fluctuation token calculation device 100;
a shearing section for applying a shearing force to the first raw material composition and the second raw material composition to produce the polymerizable composition for optical materials;
A stirring unit that applies a stirring force to the polymerizable composition for optical materials;
a casting section for casting the polymerizable composition for optical materials into a mold;
a curing section for curing the polymerizable composition for an optical material by polymerizing the two or more different types of monomers for an optical material in the polymerizable composition for an optical material in the mold;
and a constant volume liquid delivery unit.

<Shear section>
In the shearing section, a shearing force is applied to the first raw material composition and the second raw material composition to produce the polymerizable composition for an optical material.
In the shear section, a method of applying a force in a direction intersecting the flow direction may be, for example, a method using a power mixer.
The preferred ranges of the flow velocity of the polymerizable composition for an optical material, the rotation speed of the power mixer, etc. in the shearing section are the same as the preferred ranges of the flow velocity of the polymerizable composition for an optical material, the rotation speed of the power mixer, etc. in the above-mentioned <shearing step>.

<Mixing section>
In the stirring section, a stirring force is applied to the polymerizable composition for an optical material.
As a method for applying a force in a direction substantially opposite to the direction of flow in the stirring section, for example, a method using a stirring vessel containing a stirrer can be mentioned.
The preferred ranges of the flow rate of the polymerizable composition for an optical material in the stirring part, the rotation speed of the stirring tank, etc. are the same as the preferred ranges of the flow rate of the polymerizable composition for an optical material, the rotation speed of the stirring tank, etc. in the above-mentioned <Stirring step>.

<Casting section>
In the casting section, the polymerizable composition for an optical material is cast into a mold.
Details such as the specific embodiment of casting, the preferred range of the viscosity of the polymerizable composition for optical materials in the casting part, etc. are the same as the details of the specific embodiment of casting, the preferred range of the viscosity of the polymerizable composition for optical materials in the casting part, etc. in the above-mentioned <Casting step>.

<Cured part>
In the curing section, two or more different types of monomers for optical materials in the polymerizable composition for optical materials in the mold are polymerized to cure the polymerizable composition for optical materials.
The details of the specific aspects, preferred aspects, etc. of the hardened portion are the same as the details of the specific aspects, preferred aspects, etc. of the above-mentioned <hardening step>.

<Quantitative liquid delivery section>
In the constant volume delivery section, the first raw material composition and the second raw material composition are delivered to the shear section.
Specific examples of the constant volume liquid delivery unit include pumps such as gear pumps and diaphragm pumps.
In the constant volume delivery section, the speed at which the first raw material composition and the second raw material composition are delivered to the shear section may be appropriately adjusted.

<Production condition control device>
The optical component manufacturing system of the present disclosure preferably further includes a manufacturing condition control device that controls the manufacturing conditions in the optical component manufacturing so that the manufacturing conditions are those determined by the environmental load value fluctuation token calculation device 100 .
For example, the manufacturing condition control device controls the viscosity of the polymerizable composition for an optical material in the stirring section to be included in the manufacturing conditions determined by the environmental load value fluctuation token calculation device 100 .

By controlling the viscosity of the polymerizable composition for optical materials in the stirring section, U-shaped striae can be suppressed more effectively. In addition, U-shaped striae can be suppressed more effectively over a long period of time. This changes the yield information, making it possible to reduce the environmental impact value in the production of the optical component.

The manufacturing condition control device also controls the temperature in the mixing section to be within the manufacturing conditions determined by the environmental load value fluctuation token calculation device 100.

By controlling the temperature in the stirring section, U-shaped striae can be suppressed more effectively. In addition, U-shaped striae can be suppressed more effectively over a long period of time. This changes the yield information, and therefore the environmental load value in the manufacture of the optical component can be reduced.

The manufacturing condition control device may control things other than viscosity and temperature.
For example, the liquid level of the polymerizable composition for an optical material in the stirring section may be controlled. That is, when the liquid level of the polymerizable composition for an optical material drops, the liquid level is raised by feeding the polymerizable composition for an optical material using a constant-volume feeding section (e.g., a pump).

<Operation of Optical Component Manufacturing System>
An example of a processing routine performed by the environmental load value fluctuation token calculation device 100 will be described below with reference to FIG.
First, in step S100, the first acquisition unit 102 acquires first energy amount information indicating the amount of energy to be input to the polymerization unit in the above-mentioned optical component production in which a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst is polymerized.
In step S102, the second acquisition unit 104 acquires second energy amount information indicating the amount of energy input for maintaining the temperature of the space in which the overlapping unit is disposed in the production of the optical member.
In step S104, the third acquisition unit 106 acquires yield information of the optical components manufactured in the optical component manufacturing process.
In step S106, the calculation unit 108 calculates an environmental load value A in the production of the optical member from the first energy amount information, the second energy amount information, and the yield information.
In step S108, the calculation unit 108 calculates an environmental load value B that occurs under optical component manufacturing conditions by given polymerization that are different from the optical component manufacturing.

In step S110, the calculation unit 108 calculates a first additional fluctuation amount of the environmental load value from the difference between the given number of polymerization copies input by the user and the number of polymerization copies used in the production of the optical component, a predetermined environmental load value required for producing one polymerization copy, and a predetermined environmental load value required for storing one polymerization copy.
For example, the calculation unit 108 calculates a first additional fluctuation amount of the environmental load value by multiplying the sum of the environmental load value required to manufacture one polymerization part and the environmental load value required to store one polymerization part by the difference between a given number of polymerization parts and the number of polymerization parts used in the manufacture of the optical component.
In addition, the calculation unit 108 calculates a second additional fluctuation amount of the environmental load value from the difference between the number of temperature control devices for a given polymerization unit input by the user and the number of temperature control devices for the polymerization unit used in manufacturing the optical component, a predetermined environmental load value required to manufacture one temperature control device, and a predetermined environmental load value due to the exhaust heat of one temperature control device.
For example, the calculation unit 108 calculates a second additional fluctuation amount of the environmental load value by multiplying the sum of the environmental load value required to manufacture one temperature control device and the environmental load value due to the heat exhausted from one temperature control device by the difference between a given number of polymerization copies and the number of polymerization copies used in manufacturing the optical component.
In addition, the calculation unit 108 calculates a third additional fluctuation amount of the environmental load value from the difference between a predetermined environmental load value required for processing a given optical component and an environmental load value required for processing an optical component manufactured by the optical component manufacturing process input by the user.
The calculation unit 108 calculates the amount of fluctuation in the environmental load value from the calculated environmental load value A and environmental load value B, and adds the first additional fluctuation amount to the third additional fluctuation amount to this amount of fluctuation in the environmental load value, thereby calculating the amount of fluctuation in the environmental load value in comparison with the optical component production conditions by given polymerization.

In step S112, the calculation unit 108 multiplies the calculated fluctuation amount of the environmental load value by a predetermined value to calculate a fluctuation token.
In step S114, the manufacturing condition determination unit 110 determines whether the calculated variable token is equal to or greater than a given value. If the variable token is equal to or greater than the given value, the processing routine ends. On the other hand, if the variable token is less than the given value, the processing proceeds to step S116.
In step S116, the manufacturing condition determination unit 110 changes the manufacturing conditions for the optical member manufacturing so as to increase the variable token, that is, so as to reduce the environmental load value.

The manufacturing condition control device controls the manufacturing conditions in the manufacture of optical members so that the manufacturing conditions are those determined by the environmental load value fluctuation token calculation device 100 .
For example, the production condition control device controls the viscosity of the polymerizable composition for optical materials in the stirring section to be included in the determined production conditions, and also controls the temperature in the stirring section to be included in the determined production conditions.

The optical component manufacturing system of the present disclosure starts with preparing a first raw material composition and a second raw material composition, and then sends the prepared first raw material composition and second raw material composition to a shearing section. The first raw material composition and the second raw material composition as a whole contain two or more different types of monomers for optical materials and a polymerization catalyst.
While the delivered first and second raw material compositions are caused to flow, a force is applied to the first and second raw material compositions in a direction intersecting the flow direction.
In the stirring section, while the polymerizable composition for optical materials is caused to flow, a force is applied to the polymerizable composition for optical materials in a direction substantially parallel to the direction of flow to stir the composition, or the flow is temporarily stopped to stir the polymerizable composition for optical materials.
Then, in the casting section, the polymerizable composition for an optical material is cast into a mold. When casting is completed, the polymerizable composition for an optical material is delivered to a curing section.
In the curing section, two or more different types of monomers for optical materials in the polymerizable composition for optical materials in the mold are polymerized to cure the polymerizable composition for optical materials.

FIG. 3 is a schematic diagram for explaining an example of an optical member manufacturing system.
In Fig. 3, a first raw material composition and a second raw material composition for producing a polymerizable composition for an optical material are prepared. The first raw material composition and the second raw material composition are stirred to become a polymerizable composition for an optical material containing two or more different monomers for an optical material and a polymerization catalyst. Therefore, it is sufficient that the first raw material composition and the second raw material composition become a polymerizable composition for an optical material when stirred, and the first raw material composition and the second raw material composition as a whole contain two or more different monomers for an optical material and a polymerization catalyst.
The first raw material composition and the second raw material composition may each contain a prepolymer obtained by partially polymerizing two or more different types of monomers for optical materials.

The first raw material composition prepared above is placed in the A liquid tank 1, and the second raw material composition is placed in the B liquid tank 2. Then, while adjusting the liquid temperature with the chiller 3, the first raw material composition is sent from the A liquid tank 1 to the A liquid metering section 4 (e.g., a gear pump), and the second raw material composition is sent from the B liquid tank 2 to the B liquid metering section 6 (e.g., a gear pump) using nitrogen back pressure or the like. At this time, the speeds of the A liquid metering section 4 and the B liquid metering section 6 may be the same or different.
Thereafter, the first raw material composition is sent from the A liquid metering section 4 via the A liquid flow rate sensor head 5, and the second raw material composition is sent from the B liquid metering section 6 via the B liquid flow rate sensor head 7, to an upstream power mixer 8 which is a shear section.
At this stage, the first raw material composition and the second raw material composition are sheared by applying a force in a direction intersecting the flow direction by the upper power mixer 8, thereby obtaining a polymerizable composition for an optical material.

The polymerizable composition for an optical material is sheared by the upper power mixer 8, filtered by a capsule filter 10, and further sent to the lower power mixer 9, which is a shearing section. In the lower power mixer 9, the polymerizable composition for an optical material is sheared.
The polymerizable composition for an optical material is sheared by a lower power mixer 9, filtered by a capsule filter 10, and sent to a stirring tank 11, which is a stirring section. The stirring tank 11 includes a stirrer 12.
In the stirring tank 11, the polymerizable composition for an optical material is stirred by applying a force in a direction substantially parallel to the direction opposite to the flow direction.
Thereafter, the polymerizable composition for an optical material is further mixed or stirred in a static mixer 13, and then cast into a mold 14, which is a curing section, by a casting section.
Then, in the mold 14, two or more different types of monomers for optical materials in the polymerizable composition for optical materials are polymerized to harden the polymerizable composition for optical materials.

The control panel 15 in FIG. 3 is an example of a manufacturing condition control device.
The control panel 15 can control the manufacturing conditions in the optical member manufacturing system.
In addition, by turning on the foot switch 16, the control panel 15 can discharge at least a portion of the polymerizable composition for optical materials in the stirring section from the casting section in order to replace at least a portion of the polymerizable composition for optical materials.

FIG. 4 is a diagram showing an example of the configuration of a computer that realizes the environmental load value fluctuation token calculation device 100 and the manufacturing condition control device.
The environmental load value fluctuation token calculation device 100 and the manufacturing condition control device can be realized by, for example, a computer 60 as shown in FIG. 4. The computer 60 that realizes the environmental load value fluctuation token calculation device 100 and the manufacturing condition control device includes a Central Processing Unit (CPU) 61, a memory 62 as a temporary storage area, and a non-volatile storage unit 63. The computer also includes an input/output interface (I/F) 64 to which an input/output device or the like (not shown) is connected, and a read/write (R/W) unit 65 that controls reading and writing of data to a recording medium 68. The computer also includes a network I/F 66 that is connected to a network such as the Internet. The CPU 61, the memory 62, the storage unit 63, the input/output I/F 64, the R/W unit 65, and the network I/F 66 are connected to each other via a bus 67. The storage unit 63 can be realized by a hard disk drive (HDD), a solid state drive (SSD), a flash memory, or the like. The storage unit 63 as a storage medium stores a program for causing the computer to function. The CPU 61 reads out the program from the storage unit 63, loads it into the memory 62, and sequentially executes the processes contained in the program, thereby implementing various processing routines including the processing routine of FIG.

As described above, the environmental load value fluctuation token calculation device of the optical component manufacturing system according to the first embodiment calculates a fluctuation token according to the amount of fluctuation in the environmental load value from the amount of energy input to a polymerization section in optical component manufacturing by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, the amount of energy input to maintain the temperature of the space in which the polymerization section is arranged, and the environmental load value A calculated from the yield information of the optical component, and the environmental load value B generated under optical component manufacturing conditions by given polymerization. This makes it possible to calculate a token according to the fluctuation in the environmental load value in optical component manufacturing by polymerizing a composition containing a polymerizable compound for optical materials and a polymerization catalyst.
Furthermore, the environmental load value fluctuation token calculation device determines manufacturing conditions in the manufacture of optical components based on the calculated fluctuation token so that the fluctuation token is equal to or greater than a given value, and the manufacturing condition control device controls the manufacturing conditions in the manufacture of optical components so that the determined manufacturing conditions are achieved. This makes it possible to control the manufacturing conditions in the manufacture of optical components so that the fluctuation token is equal to or greater than the given value.

[Second embodiment]
Next, an optical member manufacturing system according to a second embodiment will be described. Note that the same reference numerals as in the first embodiment are used to designate the same components as in the first embodiment, and the description thereof will be omitted.

<Configuration of the environmental load value fluctuation token calculation device according to this embodiment>
FIG. 5 is a block diagram showing an example of the functional configuration of the environmental load value fluctuation token calculation device 200 of this embodiment.

The environmental load value fluctuation token calculation device 200 functionally comprises a first acquisition unit 102, a second acquisition unit 104, a third acquisition unit 106, a calculation unit 108, and an additional adding unit 210, as shown in FIG.
When the environmental load value fluctuation tokens calculated by the calculation unit 108 exceed a given token value, the additional adding unit 210 adds additional tokens to the environmental load value fluctuation tokens calculated by the calculation unit 108 .

<Operation of Optical Component Manufacturing System>
An example of a processing routine performed by the environmental load value fluctuation token calculation device 200 will be described below with reference to Fig. 6. Note that the same processes as those in the first embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.
First, in step S100, the first acquisition unit 102 acquires first energy amount information indicating the amount of energy input to the polymerization unit in the optical member manufacturing method described in the first embodiment.
In step S102, the second acquisition unit 104 acquires second energy amount information indicating the amount of energy input for maintaining the temperature of the space in which the overlapping unit is disposed in the production of the optical member.
In step S104, the third acquisition unit 106 acquires yield information of the optical components manufactured in the optical component manufacturing process.
In step S106, the calculation unit 108 calculates an environmental load value A in the production of the optical member from the first energy amount information, the second energy amount information, and the yield information.
In step S108, the calculation unit 108 calculates an environmental load value B that occurs under optical component manufacturing conditions by given polymerization that are different from the optical component manufacturing.
In step S110, the calculation unit 108 calculates a first additional fluctuation amount, a second additional fluctuation amount, and a third additional fluctuation amount of the environmental load value. Then, the calculation unit 108 calculates the fluctuation amount of the environmental load value from the calculated environmental load value A and environmental load value B, and adds the first additional fluctuation amount to the third additional fluctuation amount to this fluctuation amount of the environmental load value, thereby calculating the fluctuation amount of the environmental load value in the production of the optical component compared with the optical component production conditions by given polymerization.
In step S112, the calculation unit 108 multiplies the calculated fluctuation amount of the environmental load value by a predetermined value to calculate a fluctuation token.

In step S200, the additional adding unit 210 determines whether the variable token calculated in step S112 is greater than a given value. If the variable token calculated in step S112 is equal to or less than the given value, the processing routine is terminated. On the other hand, if the variable token calculated in step S112 is greater than the given value, the processing proceeds to step S202.
In step S202, the additional adding unit 210 adds an additional token to the variable token calculated in step S112, and ends the processing routine.

As described above, the environmental load value fluctuation token calculation device of the optical component manufacturing system according to the second embodiment calculates a fluctuation token according to the fluctuation amount of the environmental load value from the amount of energy input to the polymerization section in the optical component manufacturing process, which polymerizes a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, the amount of energy input to maintain the temperature of the space in which the polymerization section is located, and the environmental load value A calculated from the yield information of the optical component, and the environmental load value B generated under the optical component manufacturing conditions by given polymerization, and if the fluctuation token exceeds a given value, an additional token is granted. This makes it possible to deal with cases in which additional tokens are granted when the fluctuation token exceeds a given value.

15: Control panel 60: Computer 61: CPU
62: Memory 63: Storage unit 64: Input/output I/F
65: R/W unit 66: Network I/F
67: bus 68: recording medium 100: environmental load value fluctuation token calculation device 102: first acquisition unit 104: second acquisition unit 106: third acquisition unit 108: calculation unit 110: manufacturing condition determination unit 200: environmental load value fluctuation token calculation device 210: additional assignment unit

Claims (13)

An environmental load value fluctuation token calculation device that calculates an environmental load value fluctuation token in the production of an optical component by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, comprising:
a first acquisition unit that acquires first energy amount information indicating an amount of energy input to a polymerization unit in the production of the optical member;
a second acquisition unit that acquires second energy amount information indicating an amount of energy input for maintaining a temperature of a space in which the polymerization unit is disposed in the optical member manufacturing process;
A third acquisition unit that acquires yield information of the optical members manufactured in the optical member manufacturing process;
a calculation unit that calculates a fluctuation token according to a fluctuation amount of the environmental load value, from an environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and an environmental load value B generated under optical component production conditions by given polymerization, which are different from the optical component production conditions; and
Equipped with
The optical member production conditions are production conditions for a cast polymerization method in which a polymerizable composition containing a monomer is injected into a mold and heated to harden. The calculation unit is
(1) A fluctuation amount of an environmental load value calculated from a difference between a given number of polymerization parts and the number of polymerization parts used in the production of the optical member, an environmental load value required for producing one polymerization part, and an environmental load value required for storing one polymerization part,
(2) a difference between the number of temperature adjustment devices for a given polymerization section and the number of temperature adjustment devices for the polymerization section used in the optical component manufacturing, an environmental load value required for manufacturing one temperature adjustment device, and an environmental load value due to the exhaust heat of one temperature adjustment device; and (3) at least one of the amounts of fluctuation in the environmental load value calculated from an environmental load value required for processing a given optical component and an environmental load value required for processing the optical component manufactured by the optical component manufacturing.
The environmental load value A;
2. The environmental load value fluctuation token calculation device according to claim 1, wherein the fluctuation token is calculated from the environmental load value B. The calculation unit is
3. An environmental load value fluctuation token calculation device as described in claim 1 or 2, which calculates the environmental load value A from the first energy amount information, the second energy amount information, the yield information, and the amount of cutting dust generated when processing the optical component manufactured in the polymerization section in the optical component manufacturing. An environmental load value fluctuation token calculation device according to any one of claims 1 to 3, wherein the first energy amount information and the second energy amount information indicate the amount of energy per optical member. The environmental load value fluctuation token calculation device according to any one of claims 1 to 4, further comprising an additional token granting unit that grants additional tokens when the environmental load value fluctuation token calculated by the calculation unit exceeds a given token value. The environmental load value fluctuation token calculation device according to any one of claims 1 to 5, wherein the viscosity of the composition is within the range of 10 mPa·s to 1000 mPa·s as measured with a Brookfield viscometer at 25°C and 60 rpm. the composition contains a prepolymer obtained by polymerizing at least two kinds of polymerizable compounds for optical materials among the two or more different polymerizable compounds for optical materials,
The content of the polymerization catalyst is 0.010 parts by mass to 2.0 parts by mass with respect to a total of 100 parts by mass of the two or more different polymerizable compounds for optical materials and the prepolymer. The environmental load value fluctuation token calculation device according to any one of claims 1 to 6. The environmental load value fluctuation token calculation device according to any one of claims 1 to 7, wherein one of the polymerizable compounds for optical materials includes at least one compound selected from the group consisting of polyisocyanate compounds, episulfide compounds, and epoxy compounds. The environmental load value fluctuation token calculation device according to any one of claims 1 to 8, wherein the other polymerizable compound for optical materials includes at least one active hydrogen compound selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound containing one or more mercapto groups and one or more hydroxyl groups, a polyol compound containing two or more hydroxyl groups, and an amine compound. The environmental load value fluctuation token calculation device according to any one of claims 1 to 9, wherein the polymerization catalyst includes at least one selected from the group consisting of a basic catalyst having a pKa value of 4 to 8 and an organometallic catalyst. The environmental load value fluctuation token calculation device according to any one of claims 1 to 10, further comprising a manufacturing condition determination unit that determines manufacturing conditions for the optical component manufacturing based on the calculated fluctuation token so that the fluctuation token is equal to or greater than a given value. An environmental load value fluctuation token calculation device according to claim 11,
a manufacturing condition control device that controls manufacturing conditions in the manufacturing of the optical member so as to achieve the determined manufacturing conditions;
An optical component manufacturing system comprising: An environmental load value fluctuation token calculation method in an environmental load value fluctuation token calculation device that calculates an environmental load value fluctuation token in the production of an optical component by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, comprising:
a first acquisition unit acquires first energy amount information indicating an amount of energy to be input to a polymerization unit in the production of the optical member;
a second acquisition unit acquires second energy amount information indicating an amount of energy input for maintaining a temperature of a space in which the polymerization unit is disposed in the optical member manufacturing process;
a third acquisition unit acquires yield information of the optical component manufactured in the optical component manufacturing process;
a calculation unit calculates a fluctuation token according to a fluctuation amount of the environmental load value from an environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and an environmental load value B generated under the optical component manufacturing conditions by given polymerization, which are different from the optical component manufacturing conditions, and which is calculated from the first energy amount information, the second energy amount information, and the yield information.
Including,
The optical member production conditions are production conditions of a cast polymerization method in which a polymerizable composition containing a monomer is injected into a mold and heated to harden it.
Environmental load value fluctuation token calculation method.