JP7222878B2 - Composition for forming antistatic film for windshield, timepiece using the same, and method for manufacturing timepiece - Google Patents

Description

TECHNICAL FIELD The present invention relates to a composition for forming an antistatic film for a windshield, a timepiece using the same, and a method for manufacturing a timepiece.

Patent Literature 1 describes a cover member for a timepiece provided with a translucent base material. In this watch cover member, an antireflection layer formed by alternately laminating a layer made of silicon oxide (SiO ₂ ) and a layer made of silicon nitride (SiN) is formed on one surface of the base material. It is An antistatic layer having at least a transparent conductive film layer is formed on the other surface of the base material. The antistatic layer is formed using ITO (Indium Tin Oxide).

JP 2017-128494 A

However, the watch cover member of Patent Document 1 is inferior in antistatic performance.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a composition for forming an antistatic film for a windshield as a cover member capable of forming an antistatic film having excellent antistatic performance.

The windshield antistatic film-forming composition of the present invention comprises a conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, and at least one alcohol selected from isopropyl alcohol and ethanol. and water, the conductive polymer in an amount of 0.03% by mass or more and 5.0% by mass or less, and the acetylenic surfactant in an amount of 0.01% by mass or more and 1.0% by mass or less. and contains the water-soluble organic solvent having a boiling point of 180° C. or higher in an amount of 0.1% by mass or more and 10.0% by mass or less.

According to the composition for forming an antistatic film for a windshield of the present invention, an antistatic film having excellent antistatic performance can be formed.

FIG. 1 is a cross-sectional view of the timepiece of the embodiment.

A form (embodiment) for carrying out the present invention will be described in detail. The present invention is not limited by the contents described in the following embodiments. In addition, the components described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the configurations described below can be combined as appropriate. In addition, various omissions, substitutions, or changes in configuration can be made without departing from the gist of the present invention.

<Composition for forming antistatic film for windshield>
The windshield antistatic film-forming composition of the embodiment comprises a conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, and at least one alcohol selected from isopropyl alcohol and ethanol. and water. In addition, the windshield antistatic film-forming composition of the embodiment contains the conductive polymer in an amount of 0.03% by mass or more and 5.0% by mass or less, and the acetylenic surfactant in an amount of 0.01% by mass. The water-soluble organic solvent having a boiling point of 180° C. or higher is contained in an amount of 0.1 mass % or more and 10.0 mass % or less. From the viewpoint of solubility, it is preferable to contain the conductive polymer in an amount of 0.03% by mass or more and 1.0% by mass or less.

The composition for forming an antistatic film for a windshield according to the embodiment can form an antistatic film on the surface of a base material that constitutes the windshield of a timepiece, for example. For example, the composition for forming an antistatic film for a windshield of the embodiment can be applied by coating or the like to the surface of a base material that constitutes the windshield of a timepiece, and heated to form an antistatic film. The formed antistatic film is a conductive polymer film containing at least a conductive polymer because the water-soluble organic solvent having a boiling point of 180° C. or higher, alcohol, and water evaporate during heating. By the way, as in Patent Document 1, the antistatic film can also be formed from an inorganic compound such as ITO (Indium Tin Oxide). However, the ITO film needs to be formed using a vacuum deposition apparatus, which is complicated and expensive. Moreover, since a vacuum deposition apparatus is used, an ITO film cannot be formed if the base material is plastic. In addition, ITO films can crack due to temperature changes. On the other hand, the conductive polymer film can be formed through adhesion such as coating and heating as described above. That is, it can be formed easily and the cost can be reduced. Moreover, even if the base material is plastic, a conductive polymer film can be formed. Furthermore, the conductive polymer film is resistant to cracking due to temperature changes and has excellent antistatic properties.

Conventionally, when the base material is plastic, an antistatic film is sometimes formed using a surfactant. An antistatic film formed of a surfactant prevents static electricity by using moisture in the air to lower the surface resistance. Therefore, when the humidity is low, it is difficult to exhibit the antistatic performance. On the other hand, the antistatic film formed using the composition for forming an antistatic film for a windshield of the embodiment prevents charging due to the function of the conductive polymer. Therefore, antistatic performance can be exhibited regardless of humidity. Therefore, even when an antistatic film is provided on the dial-side surface of the base material, the antistatic performance can be exhibited.

In addition, since a watch using an electret motor is activated by electrostatic induction, it is necessary to keep the inside of the watch case at low humidity. Electrostatic attraction is likely to occur between the pointer to be displayed. As a result, uneven hand movement may occur. Even in such a timepiece, an antistatic film having excellent antistatic performance can be formed by using the windshield antistatic film-forming composition of the embodiment, so that uneven movement of the hands can be suppressed.

As described above, the formed antistatic film contains a conductive polymer, and therefore exhibits excellent antistatic performance. In addition, when the composition for forming an antistatic film for a windshield of the embodiment contains the conductive polymer in the above amount, an antistatic film capable of exhibiting excellent antistatic performance can be obtained. In addition, when the conductive polymer is contained in the above amount, it hardly affects the appearance of the windshield.

Examples of conductive polymers include poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT/PSS; Poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate)), polyaniline, polyacetylene, and polythiophene. , polypyrrole, polyphenylene vinylene, polythienylene vinylene, and derivatives thereof. The conductive polymer may be used singly or in combination of two or more.

Among these, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) is preferably used as the conductive polymer from the viewpoint of antistatic performance.

When the acetylenic surfactant is used, the composition for forming an antistatic film for windshield of the embodiment is less likely to be repelled when the composition for forming an antistatic film for windshield of the embodiment is adhered to a substrate. Therefore, it can adhere thinly and uniformly. In addition, when the composition for forming an antistatic film for a windshield of the embodiment contains the acetylenic surfactant in the above amount, the above functions are sufficiently exhibited.

Acetylene surfactants include acetylene alcohol, acetylene diol, and compounds obtained by adding alkylene oxide thereto. Acetylene-based surfactants may be used singly or in combination of two or more.

Acetylene alcohols include compounds represented by HOCR ₁ R ₂ —C≡CH (R ₁ and R ₂ each represent an alkyl group having 1 to 8 carbon atoms). Specific examples include compounds in which R ₁ is a methyl group and R ₂ is an isobutyl group, compounds in which R ₁ and R ₂ are methyl groups, and compounds in which R ₁ is a methyl group and R ₂ is an ethyl group.

The acetylenediol is represented by HOCR ₁ R ₂ —C≡C—CR ₁ R ₂ OH (R ₁ and R ₂ may be the same or different and each represents an alkyl group having 1 to 8 carbon atoms). compounds that are Specifically, compounds where R ₁ is a methyl group and R ₂ is an isobutyl group, compounds where R ₁ and R ₂ are methyl groups, compounds where R ₁ is a methyl group and R ₂ is an ethyl group, compounds where R ₁ is Examples include methyl groups and compounds in which R ₂ is an isopentyl group.

Compounds obtained by adding alkylene oxide thereto include compounds obtained by adding ethylene oxide or propylene oxide to the above acetylene alcohol or acetylene diol.

Among these, 2,5,8,11-tetramethyl-6-dodecine-5,8-diol and ethoxylate are preferably used as the acetylenic surfactant from the viewpoint of ease of film formation. .

The water-soluble organic solvent having a boiling point of 180° C. or higher evaporates gradually and slowly when the composition for forming a windshield antistatic film according to the embodiment attached to the substrate is heated. As the water-soluble organic solvent slowly evaporates, an intermolecular path of the conductive polymer (in other words, a path through which electrons can move to develop conductivity) is formed. Therefore, an antistatic film capable of exhibiting excellent antistatic performance can be obtained. Further, when the composition for forming an antistatic film for a windshield of the embodiment contains the water-soluble organic solvent having a boiling point of 180° C. or higher in the above amount, the above functions are sufficiently exhibited.

Water-soluble organic solvents having a boiling point of 180° C. or higher include dimethylsulfoxide (boiling point of 189° C.), ethylene glycol (boiling point of 197.6° C.), and N-methylpyrrolidone (boiling point of 202° C.). The water-soluble organic solvents having a boiling point of 180° C. or higher may be used singly or in combination of two or more.

Among these, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) is preferably used as dimethylsulfoxide from the viewpoint of ease of path formation.

In the composition for forming a windshield antistatic film of the embodiment, the balance is at least one alcohol selected from isopropyl alcohol and ethanol, and water. In addition, in this specification, at least one alcohol selected from isopropyl alcohol and ethanol is simply referred to as an alcohol component. As the alcohol component, isopropyl alcohol and ethanol may be used alone, or both may be used in combination. The alcohol component and water serve to dissolve both the acetylenic surfactant and the conductive polymer in the windshield antistatic film-forming composition of the embodiment.

As the alcohol component, isopropyl alcohol is preferably used from the viewpoint of compatibility.

The windshield antistatic film-forming composition of the embodiment may further contain a silane coupling agent having an epoxy group. When a silane coupling agent having an epoxy group is used, an antistatic film can be firmly adhered to the substrate, especially when the substrate is glass. In addition, the stability of the windshield antistatic film-forming composition of the embodiment is also improved.

A silane coupling agent having an epoxy group is, specifically, a silicon compound having a hydrolyzable group (X) that has affinity and reactivity with an inorganic material and an epoxy group (Y) that chemically bonds with an organic material. be. For example, the silane coupling agent is X _{3-n Men} Si-RY (X is a hydrolyzable group, Y is an epoxy group, Me is a methyl group, R is an alkylene group having 2 to 3 carbon atoms, n is 0 or 1.). Examples of the hydrolyzable group (X) include CH ₃ O--(methoxy group), CH ₃ CH ₂ O--(ethoxy group) and CH ₃ OCH ₂ CH ₂ O--(2-methoxyethoxy group). Moreover, an ethylene group and a propylene group are mentioned as R (alkylene group).

Silane coupling agents having an epoxy group include, for example, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2-(3,4 -epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldiisopropenoxysilane. Silane coupling agents having an epoxy group may be used singly or in combination of two or more.

When the composition for forming an antistatic film for a windshield of the embodiment contains a silane coupling agent having an epoxy group, the silane coupling agent having an epoxy group is contained in an amount of 0.01% by mass or more and 0.5% by mass or less. is preferably contained in an amount of

When a silane coupling agent having an epoxy group is used, the composition for forming an antistatic film for a windshield comprises a conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, and a silane coupling agent having an epoxy group, and the balance is an alcohol component and water.

The windshield antistatic film-forming composition of the embodiment may further contain at least one water-soluble resin selected from water-soluble polyurethanes and water-soluble polyesters. As the water-soluble resin, water-soluble polyurethane or water-soluble polyester may be used alone, or both may be used in combination. The use of a water-soluble resin can improve the adhesion of the antistatic film. Therefore, the antistatic film can be more preferably formed not only on the base material but also on the packing or the exterior part which is organically coated.

When the composition for forming a windshield antistatic film of the embodiment contains a water-soluble resin, it preferably contains the water-soluble resin in an amount of 0.01% by mass or more and 2.5% by mass or less.

When a water-soluble resin is used, the windshield antistatic film-forming composition comprises a conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, and a water-soluble resin. with the balance being the alcohol component and water.

The windshield antistatic film-forming composition of the embodiment can be prepared, for example, by the following procedure. First, an aqueous solution containing a conductive polymer is prepared, an alcohol component is added little by little while stirring, and then other components are added. Furthermore, an alcohol component and/or water may be added for final concentration adjustment. Thus, the windshield antistatic film-forming composition of the embodiment can be obtained.

<Watch and Watch Manufacturing Method>
FIG. 1 is a cross-sectional view of the timepiece of the embodiment. Note that the timepiece of the embodiment is a wristwatch. As shown in FIG. 1, the timepiece of the embodiment includes a windshield 10 having a base 11 and an antistatic film 12 formed on the surface of the base 11 . Specifically, the antistatic film 12 is formed on the dial 31 side surface of the base material 11 . Also, the windshield 10 is attached to the watch case 20 via a packing 32 . As a result, an airtight structure is formed to prevent dust, dirt, moisture, etc. from entering the watch. Here, the watch case 20 is formed by fitting a case 21 and a back cover 22 together. A packing 33 is provided between the case 21 and the back cover 22 . A movement 34 and a dial 31 are housed in the watch case 20 while being integrally held by a middle frame 35 . A pointer 36 is provided on the dial 31 , and a partition 37 is provided between the outer peripheral regions of the case 21 and the dial 31 .

Substrate 11 includes glass or plastic. Examples of glass include sapphire glass, soda glass, and tempered crystal glass. Examples of plastics include acrylic resins and polycarbonates. The antistatic film contains a conductive polymer. The conductive polymer is, for example, the conductive polymer exemplified in the windshield antistatic film-forming composition of the embodiment. As the conductive polymer, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) is preferably used from the viewpoint of antistatic performance.

The thickness of the base material 11 is usually 0.5 mm or more and 8 mm or less. The thickness of the antistatic film 12 is usually 4 nm or more and 1 μm or less.

The timepiece of the embodiment can be manufactured, for example, using the windshield antistatic film-forming composition of the embodiment. That is, the method for manufacturing a timepiece according to the embodiment is a method for manufacturing a timepiece including a windshield 10 having a base material 11 and an antistatic film 12 formed on the surface of the base material 11. A step of applying an antistatic film-forming composition for a windshield to the surface on the 31 side and heating to 60° C. or higher and 130° C. or lower to form the antistatic film.

Substrate 11 includes glass or plastic. The details of the base material 11 are as described above. The windshield antistatic film-forming composition comprises a conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, and at least one alcohol selected from isopropyl alcohol and ethanol. and water, the conductive polymer in an amount of 0.03% by mass or more and 5.0% by mass or less, and the acetylenic surfactant in an amount of 0.01% by mass or more and 1.0% by mass or less. and contains the water-soluble organic solvent having a boiling point of 180° C. or higher in an amount of 0.1% by mass or more and 10.0% by mass or less. The details of the composition for forming the windshield antistatic film are as described above.

The composition for forming an antistatic film for a windshield may be applied, for example, by spray coating or the like, or by dipping. The composition for forming a windshield antistatic film adhered to the substrate 11 may be heated until the water-soluble organic solvent having a boiling point of 180° C. or higher, the alcohol component, and the water evaporate. For example, it is carried out within the above temperature range for 1 hour or more and 3 hours or less. Moreover, heating may be performed in the air or in an inert gas such as nitrogen gas.

Thereby, an antistatic film 12 containing a conductive polymer is formed. Since the antistatic film 12 is composed of a thermally conductive polymer, it is resistant to cracking due to temperature changes and has excellent antistatic performance. Also, the appearance of the windshield 10 is less likely to be affected. Furthermore, even in a timepiece using an electret motor, uneven movement of the hands due to electrification can be suppressed.

The antistatic film 12 contains at least a conductive polymer and may contain an acetylenic surfactant.

In addition, when the composition for forming an antistatic film for a windshield contains a silane coupling agent having an epoxy group, the antistatic film 12 may contain a compound derived from the silane coupling agent. Moreover, when the composition for forming an antistatic film for a windshield contains an aqueous resin, the antistatic film 12 may contain the aqueous resin.

In the timepiece of the above embodiment, the antistatic film 12 is formed on the dial 31 side surface of the base material 11 . On the other hand, the antistatic film 12 may be formed on the surface of the substrate 11 opposite to the dial 31 side. In addition, in the timepiece of the above embodiment, the antistatic film 12 is directly formed on the dial 31 side surface of the base material 11 . On the other hand, the antistatic film 12 may be formed on the dial 31 side surface of the base material 11 via an intermediate layer such as an antireflection film. Moreover, in the timepiece of the above embodiment, the antistatic film 12 is formed on the surface of the base material 11 . Alternatively, the antistatic film 12 may be formed on the surfaces of the packings 32 and 33 . Furthermore, although the timepiece in the above embodiment is a wristwatch provided with hands 36, it may be a digital timepiece, a wall clock, a table clock, a pocket watch, or the like. In any of these cases, excellent antistatic performance can be exhibited.

As described above, the present invention relates to the following.
[1] The conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180 ° C. or higher, at least one alcohol selected from isopropyl alcohol and ethanol, and water, Molecules in an amount of 0.03% by mass or more and 5.0% by mass or less, the above acetylenic surfactant in an amount of 0.01% by mass or more and 1.0% by mass or less, and a water-soluble organic compound having a boiling point of 180 ° C. or higher A composition for forming an antistatic film for a windshield, containing a solvent in an amount of 0.1% by mass or more and 10.0% by mass or less.
According to the composition for forming an antistatic film for a windshield, an antistatic film having excellent antistatic performance can be formed.

[2] The composition for forming an antistatic film for a windshield according to [1], wherein the conductive polymer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate).
According to the composition for forming an antistatic film for a windshield, an antistatic film having excellent antistatic performance can be formed.

[3] The composition for forming a windshield antistatic film according to [1] or [2], further comprising a silane coupling agent having an epoxy group.
Especially when the base material is glass, the antistatic film can be firmly adhered to the base material.

[4] A timepiece comprising a windshield having a substrate and an antistatic film formed on the surface of the substrate, wherein the antistatic film is formed on the dial-side surface of the substrate, A timepiece, wherein the substrate comprises glass or plastic, and the antistatic film comprises a conductive polymer.
The watch has excellent antistatic performance.

[5] The timepiece according to [4], wherein the conductive polymer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate).
The timepiece described above is superior in antistatic performance.

[6] A method for manufacturing a timepiece having a windshield having a substrate and an antistatic film formed on the surface of the substrate, wherein an antistatic film for the windshield is formed on the dial-side surface of the substrate. and heating to 60° C. or more and 130° C. or less to form the antistatic film, the substrate comprises glass or plastic, and the composition for forming the windshield antistatic film contains a conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, at least one alcohol selected from isopropyl alcohol and ethanol, and water; in an amount of 0.03% by mass or more and 5.0% by mass or less, the above acetylenic surfactant in an amount of 0.01% by mass or more and 1.0% by mass or less, and the above water-soluble organic solvent having a boiling point of 180 ° C. or higher in an amount of 0.1% by mass or more and 10.0% by mass or less, and the antistatic film contains the conductive polymer.
According to the method for manufacturing a timepiece described above, a timepiece having excellent antistatic performance can be obtained.

[7] The method for manufacturing a watch according to [6], wherein the conductive polymer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate).
According to the timepiece manufacturing method described above, a timepiece having excellent antistatic performance can be obtained.

[8] The method for manufacturing a watch according to [6] or [7], wherein the windshield antistatic film-forming composition further contains a silane coupling agent having an epoxy group.
Especially when the base material is glass, the antistatic film can be firmly adhered to the base material.

[Example]
[Example 1-1]
First, an aqueous solution containing poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) as a conductive polymer was prepared. To an aqueous solution containing a conductive polymer, isopropyl alcohol is added little by little while stirring, followed by dimethyl sulfoxide, 2,5,8,11-tetramethyl-6-dodecine-5 as an acetylenic surfactant, 8-diol, ethoxylate, and 3-glycidoxypropyltrimethoxysilane as a silane coupling agent having an epoxy group were further added. Next, water was added to the resulting solution for final concentration adjustment, to prepare a windshield antistatic film-forming composition.
The composition for forming an antistatic film for a windshield contains 0.074% by mass of a conductive polymer, 0.029% by mass of an acetylenic surfactant, and 0.369% by mass of a water-soluble organic solvent having a boiling point of 180° C. or higher. , containing a silane coupling agent having an epoxy group in an amount of 0.123% by weight, and the balance being isopropyl alcohol (7.628% by weight) and water (91.777% by weight).

[Example 1-2]
A composition for forming a windshield antistatic film was prepared in the same manner as in Example 1-1, except that no silane coupling agent having an epoxy group was added.
The composition for forming an antistatic film for a windshield contains 0.074% by mass of a conductive polymer, 0.029% by mass of an acetylenic surfactant, and 0.369% by mass of a water-soluble organic solvent having a boiling point of 180° C. or higher. with the balance being isopropyl alcohol (7.628% by weight) and water (91.900% by weight).

[Example 1-3]
First, an aqueous solution containing poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) as a conductive polymer was prepared. To an aqueous solution containing a conductive polymer, isopropyl alcohol is added little by little while stirring, followed by dimethyl sulfoxide, 2,5,8,11-tetramethyl-6-dodecine-5 as an acetylenic surfactant, 8-diol, ethoxylate, and 3-glycidoxypropyltrimethoxysilane as a silane coupling agent having an epoxy group were further added. Next, water was added to the resulting solution for final concentration adjustment, to prepare a windshield antistatic film-forming composition.
The composition for forming an antistatic film for a windshield contains 0.516% by mass of a conductive polymer, 0.200% by mass of an acetylenic surfactant, and 2.583% by mass of a water-soluble organic solvent having a boiling point of 180° C. or higher. , containing a silane coupling agent having an epoxy group in an amount of 0.861% by weight, and the balance being isopropyl alcohol (53.393% by weight) and water (42.447% by weight).

[Example 2-1]
The windshield antistatic film-forming composition obtained in Example 1-1 was spray-coated on a sapphire glass substrate having a thickness of 1 mm, and heated in the air at 80° C. for 1 hour. A film containing a conductive polymer was produced on the sapphire glass substrate by heating.
Further, the windshield antistatic film-forming composition obtained in Example 1-1 was spray-coated on a 2 mm-thick acrylic resin substrate, and heated in the air at 80° C. for 1 hour. This heating produced a film containing a conductive polymer on the acrylic resin substrate.
Thus, a windshield having a substrate and an antistatic film formed on the surface of the substrate was produced.
Using these windshields, I assembled a watch using an electret motor. Here, the antistatic film was placed on the dial side.

[Example 2-2]
A conductive polymer was formed on a sapphire glass substrate and an acrylic resin substrate in the same manner as in Example 2-1, except that the windshield antistatic film-forming composition obtained in Example 1-2 was used. A membrane containing That is, a windshield having a substrate and an antistatic film formed on the surface of the substrate was produced. Using these windshields, a watch using an electret motor was assembled in the same manner as in Example 2-1.

[Example 2-3]
A conductive polymer was formed on a sapphire glass substrate and an acrylic resin substrate in the same manner as in Example 2-1, except that the windshield antistatic film-forming composition obtained in Example 1-3 was used. A membrane containing That is, a windshield having a substrate and an antistatic film formed on the surface of the substrate was produced. Using these windshields, a watch using an electret motor was assembled in the same manner as in Example 2-1.
[Comparative Example 1]
Using a sapphire glass substrate with a thickness of 1 mm as it is as a windshield, a watch using an electret motor was assembled. Also, a watch using an electret motor was assembled using a 2 mm thick acrylic resin base material as it was as a windshield.

<Evaluation method and evaluation result of antistatic function>
For the manufactured watch, the surface of the windshield was rubbed with a cloth to observe the movement of the hands. A case where there was no change in the state of movement of the hands was regarded as a pass, and a case where there was a change in the state of movement of the hands such as a temporary stop of the hands was regarded as a failure. The evaluation results of the watches obtained in Examples 2-1 to 2-3 were all acceptable. On the other hand, the evaluation result of the timepiece obtained in Comparative Example 1 was unacceptable.

10 Windshield 11 Base material 12 Antistatic film 20 Watch case 21 Body 22 Back cover 31 Dial plate 32 Packing 33 Packing 34 Movement 35 Middle frame 36 Pointer 37 View

Claims (8)

A conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, at least one alcohol selected from isopropyl alcohol and ethanol, and water,
The conductive polymer in an amount of 0.03% by mass or more and 5.0% by mass or less, the acetylenic surfactant in an amount of 0.01% by mass or more and 1.0% by mass or less, and the boiling point of 180 ° C. or higher containing a water-soluble organic solvent of 0.1% by mass or more and 10.0% by mass or less,
A composition for forming an antistatic film for a windshield. The conductive polymer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate),
The composition for forming an antistatic film for a windshield according to claim 1. Further containing a silane coupling agent having an epoxy group,
The composition for forming an antistatic film for a windshield according to claim 1 or 2. A timepiece comprising a windshield having a substrate and an antistatic film formed on the surface of the substrate,
The antistatic film is formed on the dial-side surface of the base material,
The substrate comprises glass or plastic,
The antistatic film contains a conductive polymer,
clock. The conductive polymer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate),
A timepiece according to claim 4. A method for manufacturing a watch provided with a windshield having a base material and an antistatic film formed on the surface of the base material,
A step of applying a composition for forming a windshield antistatic film to the surface of the base material that is to be the dial side, and heating the composition to a temperature of 60° C. or more and 130° C. or less to form the antistatic film;
The substrate comprises glass or plastic,
The windshield antistatic film-forming composition comprises a conductive polymer, an acetylenic surfactant, a water-soluble organic solvent having a boiling point of 180° C. or higher, and at least one alcohol selected from isopropyl alcohol and ethanol, water, the conductive polymer in an amount of 0.03% by mass or more and 5.0% by mass or less, and the acetylenic surfactant in an amount of 0.01% by mass or more and 1.0% by mass or less, Containing the water-soluble organic solvent having a boiling point of 180 ° C. or higher in an amount of 0.1% by mass or more and 10.0% by mass or less,
The antistatic film contains the conductive polymer,
How watches are made. The conductive polymer is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate),
A method for manufacturing a timepiece according to claim 6. The windshield antistatic film-forming composition further contains a silane coupling agent having an epoxy group.
8. A method of manufacturing a timepiece according to claim 6 or 7.

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