JP2016216540A - Soaking detergent composition for tableware and cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soaking detergent composition for tableware enhancing removing property of rice stain due to cleaning with an automatic dishwasher by soaking the rice for short time before conducting cleaning tableware to which dried and fastened rice stain adheres, good in low temperature stability, excellent in solubility in hot water during use and having no effect on the tableware even high in surfactant concentration.SOLUTION: There is provided a soaking detergent composition for tableware containing (A) dialkylsulfosuccinate having 2 linear or branched alkyl groups with 8 to 18 carbon atoms or a salt thereof of 55 mass% to 75 mass%, (B) diethylene glycol monobutyl ether of 0.5 mass% to 50 mass% and water.SELECTED DRAWING: None

Description

  The present invention relates to an immersion cleaning composition for tableware and a cleaning method.

  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 is disclosing the liquid detergent composition excellent in the detergency with respect to oil and starch soil containing dialkyl sulfosuccinates and amine oxides.
Patent document 2 is disclosing the dishwashing composition for hand-washing containing a dialkyl sulfosuccinate, a fatty acid, a magnesium inorganic compound, an alkyl glycol alkyl ether, and water.
Patent Document 3 discloses a dishwashing composition for hand washing containing a dialkyl sulfosuccinate, an anionic surfactant and an alkyl glyceryl ether.

Special table 2008-507611 JP 2012-140571 A JP 2011-231311 A

  The cleanliness of the cooked rice soil adhered to the tableware varies depending on the state of presence. In the solid grain state, it can be washed by the physical force of the washing machine. However, when it is dried in slurry form containing water, it becomes a starch film and remains on the tableware surface and becomes difficult to remove. Moreover, it becomes difficult to wash | clean further by accumulating in the recessed part of the tableware by aged use. These starch stains are difficult to confirm by visual observation after washing and can be confirmed by spraying an iodine solution, but it is troublesome to perform this normally. From the viewpoint of hygiene, etc., it is desired that starch stains that are difficult to see attached to the tableware can be reduced as much as possible by washing with an automatic dishwasher for business use.

  Washing dry and fixed starch stains is effective in reducing the affinity for tableware by swelling the starch by contact with water. For example, if pre-soaking is performed for a long time before washing, the starch stains that have been dried and fixed are easily removed. However, in many facilities, since there is a strong demand for cleaning a large amount of tableware in a short time, an immersion cleaning agent that shortens the immersion time as much as possible is desired.

  On the other hand, a composition containing dialkyl sulfosuccinate at a high concentration has disadvantages such as poor stability and poor usability due to poor viscosity and solubility. In any of Patent Documents 1 to 3, the concentration of dialkylsulfosuccinate in the composition is not high. Therefore, in consideration of usability and transportation cost, a composition containing dialkylsulfosuccinate at a high concentration and having improved low-temperature stability and solubility in warm water during use is desired.

  In general, for lunch, etc., plastic containers such as melamine, polycarbonate and polyester are used. Although these containers are excellent in safety, they are affected by the solvent contained in the immersion cleaning agent, and the surface shape changes and deteriorates. For immersion cleaning of starch soils, a composition that does not adversely affect such containers is desired.

  The present invention improves the removability of cooked rice by washing with an automatic dishwasher by immersing the tableware to which the dried and stuck rice cooked dirt is washed for a short time before washing with an automatic dishwasher. Moreover, even if the surfactant concentration is high, the low-temperature stability is excellent, the solubility in warm water is excellent during use, and the tableware immersion detergent composition does not deteriorate when used, and the use thereof The present invention relates to a method for cleaning dishes.

  In the present invention, (A) a dialkyl sulfosuccinate having two linear or branched alkyl groups having 8 or more and 18 or less carbon atoms or a salt thereof (hereinafter referred to as component (A)) is 55% by mass or more and 75. The present invention relates to an immersion cleaning composition for tableware, comprising 0.5% by mass or less, (B) diethylene glycol monobutyl ether (hereinafter referred to as component (B)) 0.5% by mass or more, 50% by mass or less, and water.

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: The following (A) component 0.0055 mass% or more and 3.75 mass% or less, the following (B) component 0.00005 mass% or more, 2.5 mass% or less, and a cleaning liquid containing water, The process of immersing tableware.
(A) Component: Dialkyl sulfosuccinate having two linear or branched alkyl groups having 8 or more and 18 or less carbon atoms or a salt thereof (B) Component: Diethylene glycol monobutyl ether Step 2: Using an automatic dishwasher The process of washing dishes.

  In the present invention, “for tableware” includes both tableware and cooking utensils. Tableware includes food storage containers.

  According to the present invention, the tableware to which the dried and fixed cooked rice meal is adhered is immersed for a short time before washing with the automatic dishwasher, so that the removal of cooked rice meal by washing with the automatic dishwasher is improved. An improved immersion detergent composition for tableware having improved stability at low temperatures during storage, excellent solubility in warm water during use, and no influence on tableware even when the surfactant concentration is high, and this There is provided a method for cleaning tableware using the.

  The reason why the effect of the present invention is manifested is not clear, but is presumed as follows. Starch dirt is swollen by contact with water and its viscosity is lowered, thereby improving the ease of washing. In the normal soaking, since a swelling occurs from the outside of the starch soil, a long soaking time is required. On the other hand, the immersion detergent composition for tableware according to the present invention combines the component (A) and the component (B), so that the wettability from the boundary portion between the starch stain and the tableware to the internal void portion is improved. It is thought that the swelling of starch proceeds from both inside and outside the soil. In addition, it is considered that the component (B) appropriately controls the thickening caused by mixing the component (A) with water and suppresses the thickening. As a result, it is considered that starch stains can be easily removed by immersion for a short period of time, and that it is possible to improve the detergency of starch stains by washing using an automatic dishwasher.

[Dipping detergent composition for tableware]
<(A) component>
The component (A) of the present invention is a dialkyl sulfosuccinate having two linear or branched alkyl groups having 8 to 18 carbon atoms or a salt thereof. Specific examples include dialkyl sulfosuccinates represented by the following general formula (I).

[Wherein, R ¹ and R ² each represent a linear or branched alkyl group having 8 to 18 carbon atoms. M is an inorganic or organic cation. ]

R ¹ and R ² in the general formula (I) may be the same or different. The number of carbon atoms of R ¹ and R ² is preferably 5 or more, more preferably 6 or more, still more preferably 7 or more, from the viewpoint of further improving starch removability, and 18 from the viewpoint of further improving starch removability. The following is preferable, 14 or less is more preferable, and 10 or less is still more preferable.
In general formula (I), each of R ¹ and R ² is specifically n-octyl group, nonyl group, decyl group, dodecyl group, tridecyl group, 2-ethylhexyl group, sec-octyl group, isopentyl group. , An alkyl group selected from an isononyl group, an isodecyl group, and a cyclohexyl group, and a group selected from an n-octyl group, a sec-octyl group, a decyl group, an isodecyl group, and a 2-ethylhexyl group.
In general formula (I), M is selected from a hydrogen ion, a sodium ion, a potassium ion, a lithium ion, a magnesium ion, an ammonium ion, an inorganic cation, a monoethanolammonium ion, a diethanolammonium ion, and a triethanolammonium ion. The organic cation is preferably a cation selected from sodium ion, potassium ion, magnesium ion, and ammonium ion. Sodium ions and potassium ions are preferable, and sodium ions are more preferable.

A method for preparing a compound in which R ¹ and R ^{2 in} general formula (I) are the same is not particularly limited. For example, see the method described in US Pat. No. 2,028,091. An asymmetric compound in which R ¹ and R ² are different can be produced by referring to the method described in, for example, JP-A No. 58-24555. When using a commercially available compound, Toho Chemical Industry Co., Ltd. Aerol CT-1K (compound in which both R ¹ and R ² are 2-ethylhexyl groups), Sanyo Chemical Industries Co., Ltd. Sanmorin OT-70S (R ¹ , Compound in which R ² is 2-ethylhexyl group), Perex OT-P manufactured by Kao Corporation (compound in which R ¹ and R ² are both 2-ethylhexyl group), and Pelex TR (in which R ¹ and R ² are both Compound that is a tridecyl group), LusitA-BO (a compound in which R ¹ and R ² are both 2-ethylhexyl groups) manufactured by BASF, and aerosol A-196 (R ¹ and R ² that were available from Mitsui Cytec Co., Ltd.) A compound in which both are cyclohexyl groups).

<(B) component>
The component (B) of the present invention is diethylene glycol monobutyl ether. The component (B) improves the low temperature stability and the solubility in warm water during use with respect to the composition of the present invention containing the component (A) at a predetermined concentration. Moreover, the damage with respect to plastic tableware can be reduced by using a predetermined amount of (B) component.

<Water>
The immersion cleaning composition for tableware of the present invention contains water. Water is used in an amount that makes up the balance of the composition. Unless otherwise specified, the content of each component in the composition is mass% with respect to the total amount of components including water.

<Other ingredients>
The immersion cleaning composition for tableware of the present invention preferably further contains propylene glycol as the component (C) from the viewpoint of further improving the solubility in hot water and the stability at low temperatures.

  It is preferable that the immersion cleaning composition for tableware of this invention contains ethanol as a (D) component further from a viewpoint of the further improvement of low-temperature stability.

  The immersion cleaning composition for tableware of the present invention is a solvent, a hydrotrope, a dispersant, a pH adjuster, a thickener, a viscosity adjuster, a fragrance, a colorant, and an antioxidant as long as the object of the present invention is not impaired. Components such as an agent, preservative, foam suppressant, bleach, and bleach activator (except for the components (A) to (D)) can be blended.

<Composition etc.>
The immersion detergent composition for tableware of this invention contains (A) component 55 mass% or more and 55 mass% or less. The immersion cleaning composition for tableware of the present invention is preferably 57% by mass or more, more preferably 60% by mass or more, from the viewpoint of further improving starch stain removability and low-temperature stability. From the viewpoint of further improving the solubility in hot water and the stability at low temperature, the content is preferably 73% by mass or less, more preferably 70% by mass or less.

  The immersion detergent composition for tableware of this invention contains (B) component 0.5 mass% or more and 50 mass% or less. In the immersion cleaning composition for tableware of the present invention, the component (B) is preferably 1.0% by mass or more, more preferably 2% by mass or more from the viewpoint of further improving low-temperature stability, and non-dish to the tableware. From the viewpoint of damage, the content is preferably 20% by mass or less, more preferably 10% by mass or less, still more preferably 7% by mass or less, and still more preferably 5% by mass or less.

  In the immersion detergent composition for tableware of the present invention, the mass ratio (A) / (B) of the component (A) to the component (B) is preferable from the viewpoint of further improving the low temperature stability and non-damage to the tableware. Is 1.1 or more, more preferably 2 or more, still more preferably 5.5 or more, and still more preferably 10 or more. The mass ratio is preferably 130 or less, more preferably 100 or less, still more preferably 80 or less, still more preferably 50 or less, and even more preferably 25 or less, from the viewpoint of further improving the hot water solubility.

  In the immersion cleaning composition for tableware of the present invention, the component (C) is preferably 10% by mass or more, more preferably 11% by mass or more, and still more preferably 12% by mass or more, from the viewpoint of further improving hot water solubility. And from a viewpoint of the further improvement of low temperature stability, Preferably it is 16 mass% or less, More preferably, it is 15 mass% or less, More preferably, it contains 14 mass% or less.

  In the immersion cleaning composition for tableware of the present invention, the component (D) is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, from the viewpoint of further improving hot water solubility and low temperature stability. And from a viewpoint of the further improvement of low temperature stability, Preferably it is 8 mass% or less, More preferably, it is 5 mass% or less, More preferably, it contains 1 mass% or less.

  The immersion cleaning composition for tableware of the present invention preferably contains water in an amount of 5% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass or more, and preferably 40% by mass or less, more preferably. 30 mass% or less, More preferably, it contains 25 mass% or less.

  The pH at 25 ° C. of the immersion detergent composition for tableware of the present invention is preferably 4 or more, more preferably 5 or more, from the viewpoint of further improving starch stain removability, and further improvement of low-temperature stability. From the viewpoint, it is preferably 12 or less, more preferably 10 or less, and still more preferably 8 or less. The pH can be measured according to the description in JIS K 3362: 2008 8.3.

  The viscosity at 25 ° C. of the immersion detergent composition for tableware of the present invention is preferably 10 mPa · s or more, more preferably 30 mPa · s or more, and more preferably 30 mPa · s or more, from the viewpoint of further improving handling properties and hot water solubility. Is 200 mPa · s or less, more preferably 180 mPa · s or less. The viscosity can be measured according to the description of JIS Z 8803: 2011. Specifically, using a B type viscometer manufactured by TOKIMEC, the measurement is performed under the conditions of rotor: No. 1 and rotation speed: 30 rpm. be able to.

<Dishwashing method>
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: The following (A) component 0.0055 mass% or more and 3.75 mass% or less, the following (B) component 0.00005 mass% or more, 2.5 mass% or less, and a cleaning liquid containing water, The process of immersing tableware.
(A) Component: Dialkyl sulfosuccinate having two linear or branched alkyl groups having 8 or more and 18 or less carbon atoms or a salt thereof (B) Component: Diethylene glycol monobutyl ether Step 2: Using an automatic dishwasher The process of washing dishes.

The content of the component (A) in the cleaning liquid is preferably 0.057% by mass or more, more preferably 0.060% by mass or more from the viewpoint of further improving the starch dirt cleaning property, and further the hot water solubility is increased. From the viewpoint of improvement, it is preferably 0.75% by mass or less, more preferably 0.38% by mass or less, further preferably 0.15% by mass or less, still more preferably 0.1% by mass or less, and still more preferably 0. 0.08% by mass or less, more preferably 0.07% by mass or less.
Further, the content of the component (B) in the cleaning liquid is preferably 0.00005% by mass or more, more preferably 0.001% by mass or more, and further preferably 0.002% by mass from the viewpoint of further improving the solubility in hot water. From the viewpoint of further improving the damage to the tableware, it is preferably 0.5% by mass or less, more preferably 0.25% by mass or less, still more preferably 0.1% by mass or less, and still more preferably 0. 0.05% by mass or less, more preferably 0.02% by mass or less, still more preferably 0.01% by mass or less, and still more preferably 0.005% by mass or less.

  The component (A) and the component (B) used in the dishwashing washing method of the present invention are the components (A) and (B) described in the above-mentioned immersion detergent composition for tableware, and preferred embodiments are also the same. It is.

The cleaning liquid used in the dishwashing cleaning method of the present invention preferably contains propylene glycol as the component (C).
Moreover, it is preferable that the washing | cleaning liquid used with the washing | cleaning method of the dishwashing of this invention contains ethanol as (D) component. (C) component and (D) component are the (C) component and (D) component as described in the said immersion cleaning composition for tableware, A preferable aspect is also the same.

  Further, when the component (C) is contained, the concentration of the component (C) in the cleaning liquid is preferably 0.001% by mass or more, more preferably 0.012% by mass or more, from the viewpoint of further improving the hot water solubility. It is. And from a viewpoint of the further improvement of low temperature stability, Preferably it is 0.8 mass% or less, More preferably, it is 0.08 mass% or less.

  When the component (D) is contained, the concentration of the component (D) in the cleaning liquid is preferably 0.00003% by mass or more, more preferably 0.0005% by mass or more, from the viewpoint of further improving low-temperature stability. It is. And from a viewpoint of the further improvement of low temperature stability, Preferably it is 0.4 mass% or less, More preferably, it is 0.04 mass% or less.

  The cleaning liquid used in Step 1 is preferably prepared from the immersion cleaning composition for tableware of the present invention. More specifically, it is a cleaning liquid obtained by diluting the immersion cleaning composition for tableware of the present invention with water. It is preferable to dilute the immersion detergent composition for tableware of the present invention with water so that the concentrations of the component (A) and the component (B) are in the above ranges. In addition, from the viewpoint of further improving the ability to remove starch stains, the immersion detergent composition for tableware of the present invention is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and still more preferably 0.00% by water. It is diluted to 1% by mass or more and preferably 5% by mass or less, more preferably 1% by mass or less, still more preferably 0.5% by mass or less, and still more preferably 0.2% by mass or less.

  In step 1, from the viewpoint of further improving the starch stain removal property, the tableware is used as the washing liquid, preferably 1 minute or more, more preferably 3 minutes or more, still more preferably 5 minutes or more, and from the same viewpoint, preferably It is immersed for 120 minutes or less, more preferably 90 minutes or less, still more preferably 60 minutes or less, and still more preferably 30 minutes or less. Moreover, you may wash dishes with sponge etc. at the time of immersion.

  The temperature of the cleaning solution is preferably 20 ° C. or higher, more preferably 30 ° C. or higher, and further preferably 40 ° C. or higher, from the viewpoint of further improving starch dirt cleaning properties, and preferably from the viewpoint of economy and safety. Is 60 ° C. or lower, more preferably 55 ° C. or lower, and still more preferably 50 ° C. or lower. The temperature of the cleaning liquid may be a temperature before the tableware is immersed. It is preferable to maintain the temperature during immersion.

  Further, the pH of the cleaning solution is preferably 5 or more, more preferably 6 or more, from the viewpoint of further improving the starch dirt cleaning properties, and preferably 12 or less, more preferably 11 or less, from the viewpoint of safety. Preferably it is 9 or less. This pH may be a pH at a temperature at the time of immersion. Further, this pH may be a pH at 20 ° C. of the cleaning liquid.

The immersion of the tableware can be performed using an immersion tank containing a cleaning 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 a sink of 0.1 m ³ or more and 3 m ³ or less. The tableware is preferably completely immersed in the cleaning liquid. It is preferable to combine the amount of cleaning liquid with a dipping tank having a volume for completely immersing tableware.

<Step 2>
In step 2, the tableware that has been immersed in the cleaning liquid in step 1 is washed using an automatic dishwasher.
The dishes soaked in the cleaning solution in step 1 may be rinsed with water or rinsed with water.
The automatic dishwasher used in step 2 may be an automatic dishwasher generally available on the market, and a home automatic dishwasher can also be used. 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 automatic dishwasher used in step 2 is preferably a commercial automatic dishwasher.

<Preparation method of immersion detergent composition for tableware>
The tableware immersion detergent compositions listed in Table 1, Table 2, and Table 3 below were prepared as follows.
(1) The component (A) was dissolved by heating at 150 to 180 ° C. for 20 minutes.
(2) The component (C) was gradually added to the dissolved component (A) and mixed.
(3) After confirming that the mixture was uniformly dissolved, the mixture was gradually cooled to 70 ° C. or lower.
(4) Because of the high temperature, the dispersed component (C) was added and prepared, and then ion-exchanged water was gradually added and mixed.
(5) After confirming that the mixture was uniformly dissolved, the mixture was gradually cooled to 40 ° C. or lower, and then component (B) was gradually added and mixed.
(6) After confirming that the mixture was uniformly dissolved, component (D) was gradually added and mixed.
(7) After confirming that the mixture was uniformly dissolved, an immersion detergent composition for tableware was obtained.
Here, with respect to the compositions of Comparative Examples 1-1 to 1-4 in Table 1, tableware immersion detergent compositions were prepared using the compounds shown in Table 1 instead of the component (B).

Here, the components used are as follows.
Component (A): Di-2-ethylhexyl sulfosuccinate sodium salt (manufactured by Tokyo Chemical Industry, reagent: 100% product)
-(B) component: Diethylene glycol monobutyl ether (Product name: BDG-NS (manufactured by Nippon Emulsifier Co., Ltd.))
-(C) component: Propylene glycol (Asahi Glass Co., Ltd.)
-Component (D): ethanol (reagent grade 1)

<Evaluation method>
The following evaluation was performed using the obtained immersion detergent composition for tableware.
[I] Starch stain removability (1) The rice bowl cooked with a rice cooker inside the melamine tea bowl having a diameter of 12 cm, a height of 4.5 cm, and a semicircular shape from the side. The strips were 3 cm wide and 16 cm long so as to overlap the diameter, and rubbed so that no rice grains remained. 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 having a length of 18.7 cm, a width of 12.8 cm, and a height of 6.0 cm, and charging 0.8 g of the tableware immersion detergent composition described in the table. Was prepared. The concentration of the immersion detergent composition for tableware in the cleaning liquid was 0.1% by mass.
(4) The tea bowl was taken out after being soaked in a cleaning solution for 5 minutes (Step 1) so that half of the area where the cooked rice was rubbed was soaked.
(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 prepared in advance with a commercial automatic dishwashing agent (Axial New Star AN: manufactured by Kao Corporation) so that the concentration is 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.
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: A very large amount of coloring is observed in the immersed portion (equivalent to the case where the immersion cleaning composition for tableware described in the table is not added).

[II] Low-temperature stability 80 ml of the immersion detergent composition for tableware described in the table is put in a 100 ml glass container (No. 8, 40 mm × 120 mm, manufactured by Maruem Co., Ltd.), and is stored at −5 ° C. for 14 days. The appearance of the liquid was evaluated according to the five-stage evaluation criteria shown below.
5: Uniform and transparent (no turbidity is observed).
4: Slight turbidity is observed.
3: Slight turbidity is observed.
2: Turbidity is observed.
1: Turbidity is observed and two-layer separation occurs.

[III] Hot Water Solubility 800 mL of warm water (45 ° C. ± 5 ° C.) was charged into a 1000 mL beaker. Then, 0.8 g of the tableware immersion detergent composition described in the table was added and gently stirred 10 times so as to draw a circle with a polypropylene rod having a diameter of 10 mm and a length of 330 mm, and then for 5 minutes. Left to stand. After standing, the sediment on the lower part of the beaker was visually confirmed. The hot water solubility was evaluated according to the following five-level evaluation criteria.
5: No undissolved residue (dissolved after standing for 5 minutes).
4: Slightly undissolved residue is observed (dissolved after standing for 10 minutes).
3: Slightly undissolved residue is observed (dissolved after standing for 20 minutes).
2: Undissolved residue is observed (dissolved after standing for 40 minutes).
1: Many undissolved residues are seen (dissolve after standing for 60 minutes).

[IV] Mass change rate The immersion detergent composition for tableware described in the table was diluted to 1% by mass with ion-exchanged water, and placed in a 100 ml glass container (manufactured by ASONE: No11, diameter 40 mm × height 75 mm). 100 g was added to obtain a cleaning solution. A melamine resin test piece (30 mm × 80 mm × 3 mm) weighed in advance (up to 4 decimal places) was immersed in the cleaning liquid with an electronic balance CPA224S (manufactured by sartorius) and sealed. After storing at 50 ° C. for 10 days, the test piece was taken out, washed with water, dried at room temperature, and the mass was measured. The mass change rate due to immersion in the immersion detergent composition for tableware was determined from the following formula and judged. In addition, the mass change rate of the test piece at the time of performing the said immersion evaluation with ion-exchange water was 0%.
Mass change rate (%) = (initial mass−mass after storage) / initial mass The mass change rate was evaluated according to the following five-stage evaluation criteria.
5: 0% or more, less than 0.5% 4: 0.5% or more, less than 2% 3: 2% or more, less than 5% 2: 5% or more, less than 10% 1: 10% or more

Claims (7)

  (A) Dialkylsulfosuccinate having two linear or branched alkyl groups having 8 or more and 18 or less carbon atoms or a salt thereof (hereinafter referred to as (A) component) 55% by mass or more and 75% by mass or less, (B) A diethylene glycol monobutyl ether (hereinafter referred to as component (B)) 0.5% by mass or more and 50% by mass or less, and a water immersion detergent composition for tableware.   The immersion cleaning composition for tableware according to claim 1, wherein the mass ratio (A) / (B) of the component (A) to the component (B) is 1.1 or more and 130 or less.   Furthermore, the immersion cleaning composition for tableware of Claim 1 or 2 containing (C) propylene glycol.   Furthermore, the immersion cleaning composition for tableware in any one of Claim 1 to 3 containing (D) ethanol. A method for washing tableware, wherein the following step 2 is performed after the completion of the following step 1.
Step 1: A cleaning liquid containing 0.0055 mass% or more and 3.75 mass% or less of the following component (A), 0.00005 mass% or more and 2.5 mass% or less of the following component (B), and water. , Soaking tableware.
(A) Component: Dialkyl sulfosuccinate having two linear or branched alkyl groups having 8 or more and 18 or less carbon atoms or a salt thereof (B) Component: Diethylene glycol monobutyl ether Step 2: Using an automatic dishwasher The process of washing dishes.   The washing | cleaning method of the tableware of Claim 5 whose cleaning liquid of the process 1 is the washing | cleaning liquid which diluted the immersion detergent composition for tableware of any one of Claims 1-4 with water.   The method for cleaning tableware according to claim 5 or 6, wherein in step 1, the tableware is immersed in the cleaning liquid for 1 minute or more and 120 minutes or less.