JP6445505B2 - Dishwashing composition for machine washing - Google Patents

Description

  The present invention relates to a dishwashing composition for machine washing before washing and a method for washing dishes.

  When washing dishes at commercial facilities, hospitals, nursing homes, schools, offices, etc., so-called automatic dishwashers for business use that are suitable for washing large amounts of dishes in a short time are used. In washing dishes such as cooked rice using a commercial automatic dishwasher, the dishes are immersed in a solution diluted with a dishwashing detergent for hand washing and then prewashed with a sponge. Thereafter, washing is performed with a commercial automatic dishwasher.

Patent Document 1 has a problem that starch detergency, fat detergency, and re-contamination preventive force are good, and it has excellent storage stability without reducing amylolytic enzyme activity. It contains 6 mass% to 40 mass% of oxypropylene alkyl ether, (B) amylolytic enzyme, (C) enzyme stabilizer, (D) solubilizer, and (E) pH adjuster. A pre-soak cleaning composition is disclosed.
Patent Document 2 has high washing performance and storage stability while having low foaming properties, and does not gel at any dilution ratio. For the purpose of providing a liquid-concentrated neutral detergent composition suitable for use in a pre-immersion tank or a pre-wash tank prior to the preparation, specific nonionic surfactants (A), (B), and stearic acid (C ), A water-soluble solvent (D) and water (E), the total content of the components (A) and (B) is set to 63 to 75% by mass, and the stock solution Discloses a liquid concentrated neutral detergent composition characterized by having a pH of 6.0 to 7.5.

JP-A-2006-11385 JP-T-2004-35576

  The present invention provides a dishwashing composition for washing before machine washing, which has high starch dirt washing power when machine washing, is excellent in transparency stability, and foaming is suppressed, and a dish washing method using the same. .

The present invention includes (A) a nonionic surfactant represented by the following general formula (A1) [hereinafter referred to as component (A)], (B) a nonionic surfactant represented by the following general formula (B1) [Hereinafter referred to as component (B)], (C) one or more solvents selected from glycols having 4 carbon atoms and glycol ethers having 6 to 12 carbon atoms (hereinafter referred to as component (C)) and water. , (C) It is related with the dishwashing agent composition for machine washing before washing | cleaning exceeding 20 mass%.
^R1aO -[(EO) _m. (AO) _n ] -H (A1)
[Wherein R ^1a is a secondary alkyl group having 8 to 20 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, and m is an average addition of EO. N represents the average number of added moles of AO, m is a number of 4 or more and 10 or less, n is a number of 1 or more and 6 or less, and EO and AO are bonded in blocks or randomly. . ]
^R1bO -[(EO) _p. (AO) _q ] -H (B1)
[Wherein, R ^1b is a secondary alkyl group having 8 to 20 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, and p is an average addition of EO. Q represents the average number of moles of AO added, p is a number of 4 or more and 10 or less, q is a number of more than 6 and 10 or less, and EO and AO are bonded together in a block or randomly ing. ]

Moreover, this invention relates to the washing | cleaning method of the tableware which performs the following process 2 after completion | finish of the following process 1. FIG.
Step 1: Hand wash, dip wash or spray wash tableware with a processing solution diluted with water for the dishwashing composition for machine washing before washing according to the present invention Step 2: Using a machine washer, in Step 1 The process of washing the washed dishes

  ADVANTAGE OF THE INVENTION According to this invention, the dish-cleaner composition for machine-washing pre-washing which was high in the starch dirt washing | cleaning power at the time of machine washing | cleaning, was excellent in transparency stability, and the foaming at the time of machine washing was suppressed, and this were used. A method for cleaning dishes is provided.

  The present inventors use a specific amount of the components (A) and (B) that are specific nonionic surfactants and the component (C) that is a specific solvent, thereby cleaning the tempund stain when performing mechanical cleaning. The present inventors have found a dishwashing composition for machine pre-washing that is excellent in strength and foam-suppressing properties and can improve transparency stability.

After the tableware is pre-washed with the dishwashing composition for machine washing before washing according to the present invention, the tableware can be washed using a machine washer without necessarily requiring a rinsing step.
Thereby, in the cleaning before the machine cleaning, it is possible to realize a reduction in labor and a reduction in time due to the high cleaning power and the omission of the subsequent rinsing process. In addition, by not having a rinsing step, the composition of the present invention is brought into a washing machine and machine washing is performed, but the composition of the present invention brought in that way also contributes to an improvement in cleaning power. Therefore, it is possible to perform sufficient cleaning, and it is possible to reduce or eliminate the cleaning agent for the machine washer, and it is also possible to shorten the cleaning time. That is, it is possible to reduce the labor, time, and thus the total cost of the entire cleaning process.

[Dishwashing composition for machine washing before washing]
<(A) component>
The component (A) of the present invention is a nonionic surfactant represented by the following general formula (A1). The component (A1) is a preferable component from the viewpoints of starch dirt cleaning properties, transparent stability, and wettability.
^R1aO -[(EO) _m. (AO) _n ] -H (A1)
[Wherein R ^1a is a secondary alkyl group having 8 to 20 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, and m is an average addition of EO. N represents the average number of added moles of AO, m is a number of 4 or more and 10 or less, n is a number of 1 or more and 6 or less, and EO and AO are bonded in blocks or randomly. . ]

R ^1a in the general formula (A1) is a secondary alkyl group having 8 to 20 carbon atoms. Here, the secondary alkyl group is a residue obtained by removing a hydroxyl group from a secondary alcohol, and the carbon atom of R ^1a bonded to O— in R ^1a O— in the general formula (A1) is the second. It is a secondary carbon atom.
The number of carbon atoms of R ^1a is 8 or more, preferably 9 or more, more preferably 10 or more, from the viewpoints of starch stain detergency, foam suppression and wettability, and 20 or less, preferably from the viewpoint of transparent stability. 18 or less, more preferably 16 or less.

  AO in the general formula (A1) is an alkyleneoxy group having 3 or 4 carbon atoms, preferably a propyleneoxy group having 3 carbon atoms.

In the general formula (A1), EO and AO are bonded to the block or randomly, and preferably bonded to the block. More preferably, R ^1a O— is bonded to the block in the order of EO and AO. Specifically, the nonionic surfactant represented by the following general formula (A2) is mentioned.
R ^1a O— (EO) _m — (AO) _n —H (A2)
[Wherein, R ^1a , EO, AO, m, and n have the same meaning as described above, and EO and AO are block-bonded in this order. ]

  In the general formula (A1), the average added mole number m of EO is 4 or more, preferably 5 or more, more preferably 6 or more, and 10 or less, from the viewpoint of starch dirt cleaning properties, foam suppression properties, and wettability. Preferably it is 9 or less, More preferably, it is 8 or less.

  In general formula (A1), the average added mole number n of AO is 1 or more, preferably 2 or more, more preferably 3 or more, and 6 or less, preferably 5 or less from the viewpoint of foam suppression. .

  Specific examples of the nonionic surfactant of the general formula (A1) are preferably polyoxyethylene (7) polyoxypropylene (4.5) -sec-dodecyl ether, polyoxyethylene (7 ) Polyoxypropylene (4.5) -sec-tridecyl ether, polyoxyethylene (7) polyoxypropylene (4.5) -sec-tetradecyl ether, polyoxyethylene (7) polyoxypropylene (2.5 ) -Sec-dodecyl ether, polyoxyethylene (7) polyoxypropylene (2.5) -sec-tridecyl ether, and polyoxyethylene (7) polyoxypropylene (2.5) -sec-tetradecyl ether 1 type or 2 types or more selected are mentioned. Here, the value in () is the average number of moles of ethylene oxide or propylene oxide added.

  The weight average molecular weight of the nonionic surfactant of the general formula (A1) is preferably 200 or more, more preferably 300 or more, and preferably 1000 or less, from the viewpoints of starch dirt cleaning properties, foam suppression properties, and wettability. More preferably, it is 800 or less.

  The nonionic surfactant of the general formula (A1) is available from Nippon Shokubai Co., Ltd. under the trade name “Softanol”, for example.

<(B) component>
The component (B) of the present invention is a nonionic surfactant represented by the following general formula (B1). The component (B) is a preferable component from the viewpoints of starch stain detergency, foam suppression and wettability.
^R1bO -[(EO) _p. (AO) _q ] -H (B1)
[Wherein, R ^1b is a secondary alkyl group having 8 to 20 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, and p is an average addition of EO. Q represents the average number of moles of AO added, p is a number of 4 or more and 10 or less, q is a number of more than 6 and 10 or less, and EO and AO are bonded together in a block or randomly ing. ]

R ^1b in the general formula (B1) is a secondary alkyl group having 8 to 20 carbon atoms. Here, the secondary alkyl group is a residue obtained by removing a hydroxyl group from a secondary alcohol, and the carbon atom of R ^1b bonded to O in R ^1b O in the general formula (B1) is a secondary carbon. It is an atom.
The number of carbon atoms in R ^1b is 8 or more, preferably 9 or more, more preferably 10 or more, and 20 or less, preferably 18 or less, more preferably 16 or less, from the viewpoint of foam suppression and wettability.

  AO in the general formula (B1) is an alkyleneoxy group having 3 or 4 carbon atoms, preferably a propyleneoxy group having 3 carbon atoms.

EO and AO in the general formula (B1) are bonded to the block or randomly, and preferably bonded to the block. More preferably, R ^1b O— is bonded to the block in the order of EO and AO. Specifically, the nonionic surfactant represented by the following general formula (B2) is mentioned.
_{^{R 1b O- (EO) p -}} (AO) q -H (B2)
[Wherein, R ^1b , EO, AO, p, q have the same meaning as described above, and EO and AO are block-bonded in this order. ]

  In the general formula (B1), the average added mole number p of EO is 4 or more, preferably 5 or more, more preferably 6 or more, and 10 or less, from the viewpoints of starch stain detergency, foam suppression and wettability. Preferably it is 9 or less, More preferably, it is 8 or less.

  Moreover, in general formula (B1), the average added mole number q of AO exceeds 6, Preferably it is 7 or more, and is 10 or less, Preferably it is 9 or less from a viewpoint of foam suppression property.

  Furthermore, in the general formula (B1), the difference (qn) between the average addition mole number q of AO and the average addition mole number n of AO in the general formula (A1) is the detergency of starch stains and wettability. From the viewpoint, preferably 0.5 or more, more preferably 1 or more, still more preferably 2 or more, still more preferably 3 or more, and from the viewpoint of foam suppression and transparent stability, preferably 8 or less, more preferably It is 7 or less, more preferably 6 or less, and still more preferably 5 or less.

  Specific examples of the nonionic surfactant of the general formula (B1) are preferably polyoxyethylene (7) polyoxypropylene (8.5) -sec-dodecyl ether, polyoxyethylene (7 1) or 2 or more types chosen from polyoxypropylene (8.5) -sec-tridecyl ether and polyoxyethylene (7) polyoxypropylene (8.5) -sec-tetradecyl ether. Here, the value in () is the average number of moles of ethylene oxide or propylene oxide added.

  The weight average molecular weight of the nonionic surfactant of the general formula (B1) is preferably 200 or more, more preferably 300 or more, and preferably 1200 or less, from the viewpoints of starch stain cleaning properties, foam suppression properties, and wettability. More preferably, it is 1000 or less.

  The nonionic surfactant of the general formula (B1) is available from Nippon Shokubai Co., Ltd. under the trade name “Softanol”, for example.

<(C) component>
The component (C) of the present invention is at least one solvent selected from glycols having 4 carbon atoms and glycol ethers having 6 to 12 carbon atoms. Component (C) is a preferable component from the viewpoint of transparent stability.
The component (C) is preferably a glycol ether having 6 to 12 carbon atoms from the viewpoint of transparent stability.

  Examples of the glycol having 4 carbon atoms include one or more selected from 1,3-butanediol, 1,2-butanediol, 1,4-butanediol, and glycol having 4 carbon atoms. Therefore, it is preferably at least one selected from 1,3-butanediol and 1,2-butanediol, and more preferably 1,3-butanediol. The glycol having 4 carbon atoms does not contain an ether bond.

  The number of carbon atoms of the glycol ether having 6 to 12 carbon atoms is preferably 8 or more and preferably 10 or less from the viewpoint of transparent stability. The carbon number is the total carbon number of glycol ether.

The glycol ether having 6 to 12 carbon atoms is a polyether of glycol having 2 or 3 carbon atoms such as ethylene glycol or propylene glycol, or a monoalkyl ether in which one alkyl group is ether-bonded to the glycol or the polyether. Compounds are preferred.
The alkyl group of the monoalkyl ether preferably has 1 to 4 carbon atoms, and is a methyl group, an ethyl group, various propyl groups, or various butyl groups. Various types include normal, iso, and tertiary.

  Specific examples of the glycol ether having 6 to 12 carbon atoms include 3-methyl-3-methoxybutanol (carbon number 6), ethylene glycol monobutyl ether (carbon number 6), dipropylene glycol (carbon number 6), diethylene glycol mono Examples thereof include butyl ether (8 carbon atoms), dibutylene diglycol (8 carbon atoms), dipropylene glycol monobutyl ether (10 carbon atoms), triethylene glycol monobutyl ether (10 carbon atoms) and the like, preferably from the viewpoint of transparent stability. Is at least one selected from diethylene glycol monobutyl ether and triethylene glycol monobutyl ether, more preferably diethylene glycol monobutyl ether.

<Ethanol>
The dishwashing composition for machine washing before washing of the present invention preferably contains ethanol from the viewpoint of transparent stability.

<Water>
The dishwashing composition for machine washing before washing of the present invention contains water. Water is used in an amount that makes up the balance of the composition. As the water, ion-exchanged water or distilled water can be used. Further, a small amount of chlorine may be contained for the purpose of sterilizing or sterilizing water. The dishwashing composition for machine pre-washing of the present invention is preferably a liquid.

<Other ingredients>
In the dishwashing composition for washing before machine washing of the present invention, a dispersant, a pH adjuster, a thickener, a viscosity adjuster, a fragrance, a colorant, an antioxidant, as long as the object of the present invention is not impaired. Components such as preservatives, foam inhibitors, bleaches, bleach activators and enzymes (excluding components (A) to (C)) can be blended.

<Composition etc.>
The dishwashing detergent composition for machine washing before washing according to the present invention preferably comprises (A) component, (B) component, (C) component, and water in a predetermined ratio.
In the dishwashing composition for machine washing before washing according to the present invention, the component (A) is preferably 2% by mass or more, more preferably 3% by mass or more, from the viewpoints of starch stain cleaning property, transparent stability and wettability. Further, more preferably 4% by mass or more, still more preferably 5% by mass or more, and preferably 20% by mass or less, more preferably 18% by mass or less, and still more preferably 15% from the viewpoint of reducing raw material costs and foam suppression. It is contained by mass% or less, more preferably 12 mass% or less, still more preferably 10 mass% or less.

  In the dishwashing composition for machine washing before washing according to the present invention, the component (B) is preferably 1% by mass or more, more preferably 2% by mass or more, and still more preferably, from the viewpoint of starch stain cleaning properties and foam suppression. Is 3% by mass or more, more preferably 4% by mass or more, and preferably 20% by mass or less, more preferably 18% by mass or less, and still more preferably 15% by mass or less from the viewpoint of transparency stability and reduction of raw material costs. More preferably, it is 12 mass% or less, More preferably, it is 10 mass% or less, More preferably, it contains 8 mass% or less.

  The total amount of the component (A) and the component (B) in the dishwashing composition for machine washing before washing according to the present invention is preferably 5% by mass or more, more preferably 10% by mass from the viewpoint of starch dirt cleaning properties. % Or more, more preferably 15% by mass or more, and from the viewpoint of foam suppression and transparent stability, it is preferably 30% by mass or less, more preferably 25% by mass or less, and still more preferably 20% by mass or less.

  In the dishwashing composition for machine washing before washing, the mass ratio (A) / (B) of the content of the component (A) and the content of the component (B) is starch stain detergency, wettability, and transparent stability. In view of the above, preferably 0.1 or more, more preferably 0.3 or more, still more preferably 0.5 or more, still more preferably 1 or more, and from the viewpoint of wettability and foam suppression, preferably 10 or less, More preferably, it is 8 or less, More preferably, it is 6 or less, More preferably, it is 3 or less.

  The dishwashing detergent composition for machine washing before washing according to the present invention, the component (C) exceeds 20% by mass, preferably 23% by mass or more, more preferably 25% by mass or more, from the viewpoint of transparent stability. Preferably, it is 28% by mass or more, more preferably 30% by mass or more, and from the viewpoint of reducing raw material costs, it is preferably 70% by mass or less, more preferably 60% by mass or less, still more preferably 50% by mass or less, and still more. Preferably it contains 40 mass% or less.

  The dishwashing detergent composition for machine washing before washing of the present invention is a mass ratio of the total content of the component (A) and the component (B) and the content of the component (C) [(A) + (B)] / ( C) is preferably 1 or less, more preferably 0.8 or less, still more preferably 0.7 or less, still more preferably 0.6 or less, and still more preferably 0.5 or less, from the viewpoint of transparent stability. Still more preferably, it is 0.45 or less, More preferably, it is 0.4 or less, and from a viewpoint of raw material cost reduction, it is preferably 0.1 or more, more preferably 0.2 or more.

  In the dishwashing composition for machine washing before washing according to the present invention, ethanol is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1% by mass from the viewpoint of transparent stability. From the viewpoint of economic efficiency, the content is preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably 3% by mass or less.

  In the dishwashing composition for machine washing before washing of the present invention, water is preferably 5% by mass or more, more preferably 10% by mass or more, and still more preferably 20% by mass or more, from the viewpoint of reducing raw material costs and solubility. More preferably, it is 30% by mass or more, and from the viewpoint of blending the nonionic surfactant and the solvent, it is preferably 77% by mass or less, more preferably 75% by mass or less, still more preferably 70% by mass or less, more More preferably, it contains 65 mass% or less.

<PH>
The pH at 25 ° C. of the dishwashing composition for machine washing before washing according to the present invention is preferably 4 or more, more preferably 5 or more, still more preferably 6 or more, and preferably 10 from the viewpoint of safety. Hereinafter, it is more preferably 9 or less, and still more preferably 8 or less. The pH can be measured according to the description of JIS K 3362: 2008 8.3.

<Viscosity>
The viscosity at 25 ° C. of the dishwashing composition for machine washing before washing according to the present invention is preferably 200 mPa · s or less, more preferably 100 mPa · s or less, and preferably 5 mPa · s from the viewpoint of handling during use. · S or more, more preferably 10 mPa · s or more. The viscosity can be measured according to the description of JIS Z 8803: 2011. Specifically, using a B-type viscometer manufactured by TOKIMEC, rotor: No. 1. It can be measured under the condition of rotation speed: 30 rpm.

The dishwashing detergent composition for machine washing before machine washing of the present invention is preferably obtained by blending (A) component, (B) component, (C) component and water.
The dishwashing composition for machine washing before washing according to the present invention is preferably obtained by further blending ethanol from the viewpoint of transparent stability.

<Method for producing dishwashing composition for machine washing before washing>
This invention is a manufacturing method of the dishwashing agent composition for machine-washing prewashing which mixes (A) component, (B) component, (C) component, and water, Comprising: (C ) A method for producing a dishwashing composition for machine pre-washing, which is mixed so that the mixing amount of the components exceeds 20% by mass. By this manufacturing method, the dishwashing agent composition for machine washing before washing | cleaning which contains (A) component, (B) component, (C) component, and water and content of (C) component exceeds 20 mass%. Manufactured.
The present invention also relates to a method for producing a dishwashing composition for washing before machine washing, comprising mixing component (A), component (B), component (C), ethanol, and water. Provided is a method for producing a dishwashing composition for machine washing before washing so that the amount of component (C) in the mixture exceeds 20% by mass. By this manufacturing method, it contains (A) component, (B) component, (C) component, ethanol, and water, and the content of (C) component exceeds 20 mass%, the dishwashing agent composition for machine washing before washing | cleaning Things are manufactured.

Specific examples and preferred embodiments of the component (A), the component (B) and the component (C) used in the method for producing a dishwashing composition for machine washing before washing according to the present invention are as follows. The same as described in the dishwashing detergent composition for washing.
The (A) component, (B) component, (C) component, ethanol and water contents, and (A) component and (B) component described in the dishwashing detergent composition for machine washing before washing according to the present invention The total content can be applied to the method for producing a dishwashing composition for machine pre-washing of the present invention by replacing the content with a mixing amount.
Moreover, the mass ratio (A) / (B) of the content of the component (A) and the content of the component (B) described in the dishwashing composition for machine washing before washing of the present invention, and the component (A) ( The mass ratio [(A) + (B)] / (C) of the total content of the component B) and the content of the component (C) reads the content of each component as the mixed amount, and the machine cleaning of the present invention It can be applied to a method for producing a dishwashing composition for pre-washing.

[How to wash dishes]
The detergent composition of the present invention is used as a treatment composition before washing by a mechanical washer, that is, an automatic dishwasher.
Examples of the pretreatment cleaning method using the dishwashing composition for machine cleaning before washing according to the present invention include (1) a flexible material containing the composition, for example, a sponge containing the composition and water, etc. (2) an immersion cleaning method in which an article having a hard surface, for example, tableware is immersed in an immersion cleaning agent containing the composition, (3) For example, a cleaning method in which the composition is brought into contact with the tableware by spraying or applying, for example, by spraying. You may use combining these.
When the tableware of (1) is washed by hand, the content of the cleaning composition after being diluted with water contained in the sponge is preferably 0.1% by mass or more, more preferably 0.5% by mass. Above and preferably 5% by mass or less, more preferably 3% by mass or less.
In the case of immersion cleaning of (2), the content of the cleaning composition in the immersion cleaning agent is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and preferably 1% by mass. % Or less, more preferably 0.5% by mass or less.
When spray cleaning is performed by spraying or the like of (3), the content of the cleaning composition in the spray cleaning agent is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and preferably Is 1% by mass or less, more preferably 0.5% by mass or less.

  A preferred cleaning method of the present invention is a cleaning composition of the present invention, comprising the steps of washing, immersing or spraying the dishes with a flexible tool such as a sponge, and washing the dishes with a machine. Have. Hereinafter, a more specific cleaning method will be described.

This invention relates to the washing | cleaning method of the tableware which performs the following process 2 after completion | finish of the following process 1. FIG.
Step 1: Washing tableware by hand, dipping or spray washing with a processing solution diluted with water for the dishwashing composition for machine washing before washing of the present invention Step 2: Washing in Step 1 using a machine washer Process of washing the tableware

<Step 1>
In any case of hand washing, immersion washing, and spray washing, the temperature of the treatment liquid in step 1 is preferably less than 70 ° C., more preferably 60 ° C. or less, and further preferably 50 ° C. from the viewpoint of cleaning power and safety. Below, and preferably 5 ° C. or higher.

When washing by hand in Step 1, it is preferable to wash the dishes with a flexible material such as a sponge containing water.
When washing by hand in Step 1, the content of the dishwashing composition for washing before machine washing of the present invention in the treatment liquid is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, And preferably it is 5 mass% or less, More preferably, it is 3 mass% or less. The dishwashing composition for machine pre-washing of the present invention is diluted with water so as to have this content.

In the case of immersion cleaning in Step 1, the content of the dishwashing composition for washing before machine washing of the present invention in the treatment liquid is preferably 0.01% by mass or more, more preferably 0.05% by mass or more. And, it is preferably 1% by mass or less, more preferably 0.5% by mass or less. The dishwashing composition for machine pre-washing of the present invention is diluted with water so as to have this content.
In the case of immersion cleaning in Step 1, from the viewpoint of cleaning power, preferably 1 minute or more, more preferably 3 minutes or more, still more preferably 5 minutes or more, and from the same viewpoint, preferably 120 minutes or less, more preferably Immerse the dishes in the treatment liquid for 90 minutes or less, more preferably 60 minutes or less, and even more preferably 30 minutes or less. Moreover, you may wash dishes with sponge etc. at the time of immersion. That is, the step 1 may be a step of washing and dip washing the tableware with the treatment liquid. In this case, the order and frequency of hand washing and immersion washing are not limited.
The immersion of the tableware can be performed using an immersion tank containing a treatment liquid. What is generally expressed as a sink can be used for an immersion tank. The volume of the sink used for business use varies depending on the size of the washing room in the kitchen, and examples thereof include 0.1 m ³ or more and 3 m ³ or less. The tableware is preferably completely immersed in the treatment liquid. It is preferable to combine the amount of the treatment liquid with an immersion tank having a volume for completely immersing the tableware.

In the case of spray washing in step 1, the content of the dishwashing composition for washing before machine washing of the present invention in the treatment liquid is preferably 0.01% by mass or more, more preferably 0.05% by mass or more. And, it is preferably 1% by mass or less, more preferably 0.5% by mass or less. The dishwashing composition for machine pre-washing of the present invention is diluted with water so as to have this content.
When spray cleaning is performed in step 1, preliminary cleaning using a mechanical cleaning machine can be performed from the viewpoint of cleaning power. The spray cleaning time is preferably 1 second or more, more preferably 2 seconds or more, still more preferably 3 seconds or more, and from the same viewpoint, preferably 120 seconds or less, more preferably 90 seconds or less, still more preferably 60 seconds. The tableware is then spray-washed. That is, the step 1 may be a step of washing the tableware with the treatment liquid by hand washing, immersion washing and spray washing. The spray cleaning of the tableware can be performed using a general commercial machine washer. The machine washing machine can use what is expressed as an undercounter type, a door type, or a conveyor type. In particular, it is preferable to use a conveyor type having an immersion tank, and it is preferable to combine a machine washer having a high spraying pressure capable of bringing the spray liquid into contact with the tableware surface.

<Process 2>
In step 2, the tableware washed in step 1 is washed using a machine washer.
From the viewpoint of excellent foam suppression in step 2, the dishes washed in step 1 need not be rinsed with water.
Examples of the machine washer used in step 2 include an apparatus known as an automatic dishwasher. The automatic dishwasher may be an automatic dishwasher generally available on the market, and a home automatic dishwasher can be used, but an automatic dishwasher for business use is preferable.
Moreover, the washing | cleaning conditions in the process 2 are not specifically limited, The kind of washing | cleaning agent, washing | cleaning temperature, washing | cleaning time, etc. can be performed according to the well-known washing conditions by an automatic dishwasher. The cleaning liquid used in step 2 preferably has a different composition from the processing liquid used in step 1.
In step 2, washing is preferably performed at 40 ° C. or higher. Specifically, the temperature of the washing water used in step 2 is preferably 40 ° C. or higher, more preferably 50 ° C. or higher, still more preferably 60 ° C. or higher, and preferably 90 ° C. or lower from the viewpoint of foam suppression. is there.

<Preparation method of dishwashing composition for machine washing before washing>
Using the following components, a dishwashing detergent composition for machine washing as shown in Table 1 was prepared as follows.

The blending amount was calculated so that the total amount of each component was 500 g. Each component was put into a 500 mL beaker in the following order, and mixed at a rotation speed of 200 (rpm / min) using a stirrer (manufactured by TOKYO DRIKAKIKAI, Type Z-2200) and a stirring blade (three blades: 4 cm in diameter). The preparation temperature was adjusted in the range of 25 ° C to 35 ° C.
In the preparation procedure, the component (C) or the component (C ′) and ethanol are added to water, and the mixture is stirred. When the mixture becomes uniform, the component (A) or the component (A ′) and the component (B) or (B ′) The ingredients were added and stirred uniformly. When the mixture was stirred and became uniform, the pH was adjusted. The pH was adjusted by adding sodium hydroxide or citric acid.

  The pH of the dishwashing composition for washing before machine washing (stock solution) was set to 7 at 25 ° C. to ensure stability. The pH was measured by the pH measuring method of “JIS Z 8802 7.2”. A pH meter F-52 manufactured by HORIBA, Ltd. was used for pH measurement.

Here, the components used are as follows.
Component (A) A-1: R ^1a in the general formula (A1) is a secondary alkyl group having 12 to 14 carbon atoms, AO is a propyleneoxy group, m = 7.0, and n = 4.5 The ionic surfactant, trade name “SOFTANOL EP7045” (manufactured by Nippon Shokubai Co., Ltd.), EO and AO are block-bonded in this order.
A-2: R ^1a in the general formula (A1) is a secondary alkyl group having 12 to 14 carbon atoms, AO is a propyleneoxy group, m = 7.0, n = 2.5 nonionic surfactant, The trade name “Softanol EP7025” (manufactured by Nippon Shokubai Co., Ltd.), EO and AO are block-bonded in this order.
(B) Component B-1: R ^1b in the general formula (B1) is a secondary alkyl group having 12 to 14 carbon atoms, AO is a propyleneoxy group, p = 7.0, q = 8.5 The ionic surfactant, trade name “Softanol EP7085” (manufactured by Nippon Shokubai Co., Ltd.), EO and AO are block-bonded in this order.

・ (A ′) component (comparative component of component (A))
A′-1: R ^1a in the general formula (A1) is a primary alkyl group having 12 carbon atoms, AO is a propyleneoxy group, m = 7.0, n = 3.0 nonionic surfactant, EO And AO are linked in this order. A′-1 was synthesized by the following method.

<Synthesis Method of A'-1>
1-Dodecanol (Kao Co., Ltd., Calcoal 2098) 189.0 g and potassium hydroxide 1.12 g were charged into a 1 L autoclave, replaced with dry nitrogen, heated to 110 ° C., dehydrated under reduced pressure for 30 minutes, The temperature was raised to 155 ° C. At 155 ° C. ± 5 ° C., 308.35 g of ethylene oxide was gradually injected over about 2 hours so that the internal pressure of the autoclave did not become 0.4 MPa or more. After completion of the press-fitting, the reaction was continued until no decrease in the internal pressure of the autoclave was observed. Thereafter, the mixture was cooled to 120 ° C., and at 120 ° C. ± 5 ° C., 174.24 g of propylene oxide was gradually injected over 2 hours so that the internal pressure of the autoclave did not become 0.4 MPa or more. After completion of the press-fitting, the reaction was continued until no decrease in the internal pressure of the autoclave was observed. After cooling to 80 ° C., 1.20 g of acetic acid was added, mixed for 30 minutes, and filtered to obtain a block adduct of 7 mol of ethylene oxide of 1-dodecanol and 3 mol of propylene oxide.

-Component (B ') (Comparative component of component (B))
B′-1: R ^1b in the general formula (B1) is a primary alkyl group having 12 carbon atoms, AO is a propyleneoxy group, p = 7.0, q = 8.0 nonionic surfactant, EO And AO are linked in this order. B′-1 was synthesized by the following method.

<Synthesis Method of B'-1>
1-Dodecanol (Kao Co., Ltd., Calcoal 2098) 189.0 g and potassium hydroxide 1.12 g were charged into a 2 L autoclave, replaced with dry nitrogen, heated to 110 ° C., dehydrated under reduced pressure for 30 minutes, The temperature was raised to 155 ° C. At 155 ° C. ± 5 ° C., 308.35 g of ethylene oxide was gradually injected over about 2 hours so that the internal pressure of the autoclave did not become 0.4 MPa or more. After completion of the press-fitting, the reaction was continued until no decrease in internal pressure of the autoclave was observed. Thereafter, the mixture was cooled to 120 ° C., and 464.64 g of propylene oxide was gradually injected at 120 ° C. ± 5 ° C. over 2 hours so that the internal pressure of the autoclave did not become 0.4 MPa or more. After completion of the press-fitting, the reaction was continued until no decrease in internal pressure of the autoclave was observed. After cooling to 80 ° C., 1.20 g of acetic acid was added, mixed for 30 minutes, and filtered to obtain a block adduct of 1-dodecanol in 7 mol of ethylene oxide and 8 mol of propylene oxide.

-(C) component C-1: Diethylene glycol monobutyl ether (carbon number 8, brand name "BDG-NS", Nippon Emulsifier Co., Ltd. make)
C-2: Triethylene glycol monobutyl ether (10 carbon atoms, trade name “BTG”, manufactured by Nippon Emulsifier Co., Ltd.)
C-3: 1,3-butanediol (4 carbon atoms, trade name “1,3 butylene glycol”, manufactured by Daicel Corporation)
C-4: Dipropylene glycol (carbon number 6, trade name “DPG-RF”, manufactured by ADEKA Corporation)

・ (C ′) component (comparison component of (C) component)
C′-1: Propylene glycol (3 carbon atoms, trade name “propylene glycol”, manufactured by Asahi Glass Co., Ltd.)
C′-2: ethylene glycol (carbon number 2, trade name “ethylene glycol”, manufactured by Asahi Glass Co., Ltd.)
C′-3: Diethylene glycol (carbon number 4, trade name “diethylene glycol”, manufactured by Asahi Glass Co., Ltd.)

<Evaluation of detergency of starch stain>
(1) 12cm in diameter, 4.5cm in height, and 3cm wide so that the rice cooked with a rice cooker overlaps with the diameter of the teacup seen from the plane inside the melamine teacup with a semicircular shape from the side. Then, it was rubbed so as not to leave rice grains in a strip shape of 16 cm in length. The temperature of the cooked rice was 40 ± 10 ° C.
(2) The melamine teacup rubbed with rice was left in a room adjusted to 25 ° C. ± 5 ° C. for 2 hours, and it was confirmed with the tentacles that the rubbed rice was dried and solidified.
(3) Put 800 mL of warm water of 45 ° C. into a polypropylene vat with a length of 18.7 cm, a width of 12.8 cm, and a height of 6.0 cm, and add 0.8 g of the dishwashing composition for washing before machine washing described in the table. Then, a treatment liquid was prepared. The concentration of the dishwashing agent composition for washing before machine washing in the treatment liquid was 0.1% by mass.
(4) The tea bowl was taken out after being immersed in the treatment solution for 5 minutes (Step 1) so that half of the area where the cooked rice was rubbed was immersed.
(5) The taken tea bowl is set in a one-door type commercial dishwasher (SANYO DR53, manufactured by Sanyo Electric Co., Ltd.) within 1 minute, rinsed at 50 ° C, washed for 40 seconds, and rinsed at 80 ° C. Washing was performed under conditions of a time of 10 seconds (Step 2). In addition, the washing liquid tank (38L) of the washing machine is adjusted in advance with a commercial automatic dishwashing agent (Axial New Star AN: manufactured by Kao Corporation) so that the concentration becomes 0.15% by mass. Yes. In the dishwasher, the concentration of the cleaning liquid stored in the cleaning liquid tank is controlled to be constant during the cleaning.
(6) After completion of washing, the degree of coloration using an iodinated starch reaction was confirmed in order to confirm the detergency of the cooked rice inside the tea bowl.
(7) The iodine solution (reagent: 0.01N) was sprayed on the entire inside of the tea bowl, then rinsed with warm water of 40 ° C. ± 5 ° C. for 10 seconds, and the degree of coloring of the immersed part was visually determined. Evaluation of the starch soil removal property was evaluated according to the following five-level evaluation criteria. The results are shown in Table 1.
5: Slight coloring is observed in the soaked portion (very slightly starch stain remains).
4: Slight coloring is observed in the immersed part.
3: Coloring is recognized in the immersion part.
2: Many coloring is recognized by the immersion part.
1: Excessive coloration is observed in the immersed part (equivalent to the result of washing without using the dishwashing composition for machine washing before washing).

<Evaluation of transparency stability>
50 ml of the dishwashing composition for washing before machine washing described in the table was put in a 100 ml glass container (No. 8, 40 mm × 120 mm, manufactured by Maruem Co., Ltd.) and heated while gently mixing. After the appearance became white turbidity due to the temperature rise, the temperature of cooling and becoming transparent was measured with an alcohol thermometer (0 to 100 ° C.), and the results are shown in Table 1. The higher the temperature at which it becomes transparent, the better the transparency stability. A composition having excellent transparency stability is also excellent in stability during storage.

<Evaluation of foam suppression>
After the dishwashing composition for machine washing shown in the table was diluted to 0.2% by mass with ion-exchanged water, 50 ml was put into a 100 ml glass container (No. 8, 40 mm × 120 mm, manufactured by Maruem) and sealed. After raising the temperature to 40 ° C., it was shaken 20 times in the vertical direction. After standing for 10 seconds, the height of the foam was measured.
Evaluation was performed according to the following five-level evaluation criteria. The results are shown in Table 1.
Less than 5: 1 mm 4: 1 mm or more and less than 3 mm 3: 3 mm or more and less than 5 mm 2: 5 mm or more and less than 10 mm 1: 10 mm or more.
If there is little foaming of the dishwashing composition for prewashing, after performing the prewashing at the time of the hand-washing washing | cleaning and immersion washing | cleaning in process 1, when washing the tableware to which the dishwashing composition for prewashing adhered mechanically Since foaming can be suppressed, it is preferable. Furthermore, in spray cleaning, it can be directly put into a machine washer for use. In this evaluation, a larger number is preferable.

<Evaluation of wettability>
(1) A total of 1000 ml of 25 ° C. tap water at a dilution concentration of 0.1% by weight after 1 ml of the dishwashing composition for washing before machine washing described in the table is put into a 1000 ml beaker. Poured to the side wall. After the pouring was completed, the mixture was gently mixed with a glass rod having a diameter of 0.5 cm / length of 20 cm so that bubbles did not form on the surface. It was allowed to stand for 5 minutes and it was confirmed that the bubbles on the surface disappeared.
(2) Cotton knit unscoured cloth was cut into a size of 2 cm × 2 cm. The cotton knit unscoured fabric used was a fabric with naturally occurring organic soil and inorganic soil adhered. Organic soil is extracted from unrefined cloth with diethyl ether and analyzed by gas chromatography. Fatty acid and its salt are about 33% by mass, alcohols (alcohol compounds having 28 to 30 carbon atoms) are about 38% by mass. %, About 21% by mass of esters, and about 8% by mass of other substances adhered. As a result of analysis by the Kjeldahl method, the inorganic soil was a product with 1400 to 1800 ppm of Ca and 500 to 1100 ppm of Mg.
(3) Time until the cotton knit unscoured cloth cut into 2 cm × 2 cm is gently floated on a 0.1% by weight diluted solution of the dishwashing composition for machine washing before washing described in the table and sinks to the bottom of the beaker Was measured. This was repeated three times, and the average time was evaluated according to the following five-level evaluation criteria. The results are shown in Table 1.
5: Less than 30 seconds 4: 30 seconds or more but less than 60 seconds 3: 60 seconds or more but less than 90 seconds 2: 90 seconds or more but less than 120 seconds 1: 120 seconds or more Average time until cotton knit unscoured cloth sinks to the bottom of the beaker A shorter value indicates higher wettability. The higher the wettability, the higher the detergency, and the higher the number, the better this evaluation is.

Claims (8)

(A) Nonionic surfactant represented by the following general formula (A1) [hereinafter referred to as component (A)], (B) Nonionic surfactant represented by the following general formula (B1) [hereinafter, ( B) component], (C) one or more solvents selected from glycols having 4 carbon atoms and glycol ethers having 6 to 12 carbon atoms (hereinafter referred to as component (C)) and water, (C) A dishwashing composition for washing before machine washing, wherein the content of the component exceeds 20% by mass.
^R1aO -[(EO) _m. (AO) _n ] -H (A1)
[Wherein R ^1a is a secondary alkyl group having 8 to 20 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, and m is an average addition of EO. N represents the average number of added moles of AO, m is a number of 4 or more and 10 or less, n is a number of 1 or more and 6 or less, and EO and AO are bonded in blocks or randomly. . ]
^R1bO -[(EO) _p. (AO) _q ] -H (B1)
[Wherein, R ^1b is a secondary alkyl group having 8 to 20 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, and p is an average addition of EO. Q represents the average number of moles of AO added, p is a number of 4 or more and 10 or less, q is a number of more than 6 and 10 or less, and EO and AO are bonded together in a block or randomly ing. ]   The dishwashing composition for machine washing before washing | cleaning of Claim 1 obtained by mix | blending the said (A) component, the said (B) component, the said (C) component, and water.   The mass ratio [(A) + (B)] / (C) of the total content of the component (A) and the component (B) and the content of the component (C) is 1 or less. A dishwashing composition for machine washing.   The machine cleaning according to any one of claims 1 to 3, wherein the mass ratio (A) / (B) of the content of the component (A) and the content of the component (B) is 0.1 or more and 10 or less. A dishwashing composition for pre-washing.   The total content of (A) component and (B) component is 5 mass% or more and 30 mass% or less, The dishwashing agent composition for machine-washing prewashing in any one of Claims 1-4.   The dishwashing agent composition for machine washing before washing | cleaning of any one of Claims 1-5 whose (C) component is diethylene glycol monobutyl ether.   Furthermore, the dishwashing agent composition for machine washing before washing | cleaning of any one of Claims 1-6 containing ethanol. A method for washing tableware, wherein the following step 2 is performed after the completion of the following step 1.
Step 1: A step of washing the tableware by hand, dipping or spraying with a processing solution obtained by diluting the dishwashing composition for washing before machine washing according to any one of claims 1 to 7 with water Step 2: Machine washing Using the machine to wash the dishes washed in step 1