JP7421351B2 - Cleaning composition for dishwashers - Google Patents

Description

The present invention relates to a cleaning composition for dishwashers and a method for cleaning dishes.

Dishwashers are used to wash dirty dishes, glasses, cooking utensils, and other tableware in homes, restaurants, coffee shops, and other kitchens, as well as plastic containers for ingredients and products used in food and beverage factories. . The main target stains include food-derived proteins, starches, fats and oils, and these stains are combined and adhere to tableware such as plates, glasses, cooking utensils, and plastic containers. Further, during cooking, these stains may be thermally denatured and become strong stains that may stick.

Usually, washing with a dishwasher is performed in the order of a washing step and a rinsing step. The time required for these steps is very short in terms of process design for commercial use, such as approximately 40 to 180 seconds for the cleaning step and approximately 5 to 20 seconds for the rinsing step. However, in the case of stubborn stains, such a designed time may not be sufficient for cleaning, and it is not uncommon for the cleaning process to take several times the designed time to ensure sufficient cleaning.

Patent Document 1 discloses a liquid dishwashing composition containing a predetermined anionic surfactant, a predetermined another anionic surfactant, a nonionic surfactant, and water under predetermined conditions. ing.
Patent Document 2 describes a predetermined anionic surfactant, a predetermined another anionic surfactant, and a structural unit derived from a carboxylic acid having a reactive unsaturated group having 3 to 6 carbon atoms or a salt thereof. Disclosed is a liquid dishwashing detergent composition containing a polymer and water under predetermined conditions and having a pH (20° C.) of 6 or more.
Patent Document 3 discloses a cleaning agent containing decyl sulfate and condensed phosphate in a predetermined mass ratio.

JP2017-36346A JP 2017-36347 Publication JP2014-65812A

There are various types of stains that adhere to tableware, but stains that contain proteins are particularly susceptible to deterioration and solidification, and are difficult to remove with a short wash using a commercial dishwasher. Particularly in the case of egg yolk and the like, depending on the state of deterioration of the stain due to drying or denaturation over time after the stain has adhered, the stain can stick firmly and become more difficult to clean in a short period of time. In order to effectively clean protein-containing stains in a short time, it is currently necessary to wash under strong alkaline conditions. Implementation in the alkaline area is desirable.

The present invention provides a detergent composition for a dishwasher that has mild liquid properties and can effectively clean protein-containing stains when washed in a dishwasher.

The present invention contains (a) an alkyl sulfate having 10 to 12 carbon atoms, (b) an alkanolamine, and (c) one or more compounds selected from polyphosphoric acid, organic carboxylic acid, and salts thereof, and 25 The present invention relates to a dishwasher detergent composition having a pH of more than 8.0 and 11 or less at °C.

Furthermore, the present invention can be used to prepare (a) an alkyl sulfate having 10 to 12 carbon atoms [hereinafter referred to as component (a)], (b) an alkanolamine [hereinafter referred to as component (b)], and ( c) A cleaning solution that contains one or more compounds selected from polyphosphoric acid, organic carboxylic acids, and salts thereof [hereinafter referred to as component (c)] and has a pH of more than 8.0 and less than or equal to 11, and is used to clean stains containing proteins. The present invention relates to a method for cleaning tableware, which includes cleaning tableware to which is attached.

According to the present invention, there is provided a detergent composition for a dishwasher that has mild liquid properties and can effectively clean protein-containing stains when washed in a dishwasher.

<Dishwasher cleaning composition>
Component (a) is an alkyl sulfate having 10 to 12 carbon atoms. The number of carbon atoms is the number of carbon atoms in the alkyl group. The alkyl group is preferably a straight chain from the viewpoint of protein detergency. Further, the carbon of the alkyl group bonded to the sulfate group is preferably a primary carbon from the viewpoint of protein detergency. Component (a) may be a salt, such as an alkali metal salt such as a sodium salt or potassium salt, an ammonium salt, or the like. From the viewpoint of protein detergency, component (a) is preferably an alkyl sulfate having 10 carbon atoms, for example.

Component (b) is an alkanolamine. As the component (b), alkanolamines having an alkanol group having 1 or more and 8 or less carbon atoms can be mentioned. Component (b) includes monoalkanolamines, dialkanolamines, and trialkanolamines. From the viewpoint of protein detergency, component (b) is preferably a monoalkanolamine, more preferably a monoalkanolamine having an alkanol group having 1 or more and 6 or less carbon atoms. As component (b), from the viewpoint of protein detergency, one or more compounds selected from monoethanolamine and monomethanolamine are preferred.

Component (c) is one or more compounds selected from polyphosphoric acid, organic carboxylic acids, and salts thereof.
Examples of polyphosphoric acid include tripolyphosphoric acid, pyrophosphoric acid, orthophosphoric acid, hexametaphosphoric acid, and the like.
Examples of the organic carboxylic acid include one or more compounds selected from polyhydric carboxylic acids, polycarboxylic acid polymer compounds, and salts thereof.
Examples of the polyvalent carboxylic acid include polyvalent carboxylic acids having a valence of 2 or more and 6 or less. Examples of the polyvalent carboxylic acid include polyvalent carboxylic acids having 2 or more and 8 or less carbon atoms. Examples of polyhydric carboxylic acids include those having a molecular weight of 500 or less. Examples of polyvalent carboxylic acids include citric acid, malic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, fumaric acid, maleic acid, aconitic acid, methylglycinediacetic acid, ethylenediaminetetraacetic acid, and salts thereof. From the viewpoint of protein detergency, one or more polyhydric carboxylic acids selected from citric acid, malic acid, fumaric acid, methylglycine diacetic acid, ethylenediaminetetraacetic acid, and salts thereof are preferred; Salt is more preferred.
The weight average molecular weight of the polycarboxylic acid polymer compound is preferably 1,000 or more, more preferably 2,000 or more, and preferably 100,000 or less, more preferably 50,000 or less, from the viewpoint of protein detergency. This weight average molecular weight is measured, for example, by gel permeation chromatography using polystyrene as an index. Examples of the polycarboxylic acid polymer compound include those containing a compound selected from acrylic acid and methacrylic acid as a constituent monomer. Examples of the polycarboxylic acid polymer compound include polyacrylic acid, acrylic acid-maleic acid copolymer, and the like.

The detergent composition for dishwashers of the present invention contains (c1) a polyhydric carboxylic acid or its salt [hereinafter referred to as (c1)] as the component (c) from the viewpoint of protein cleaning properties and scale adhesion inhibiting properties to equipment. The composition preferably contains one or more compounds selected from (c2) a polycarboxylic acid polymer compound or a salt thereof (hereinafter referred to as (c2) component).
Further, the dishwasher detergent composition of the present invention contains a component (c1) and a component (c2) as the component (c) from the viewpoint of protein cleaning properties and ability to inhibit scale adhesion to equipment. It is preferable. In this case, (c1)/(c2), which is the mass ratio between the content of component (c1) and the content of component (c2), is preferably 0.01 or more, for example, from the viewpoint of protein detergency. It is preferably 0.5 or more, and preferably 20 or less, more preferably 10 or less.

In the dishwasher detergent composition of the present invention, from the viewpoint of protein detergency, the mass ratio (b)/(a) between the content of component (a) and the content of component (b) is as follows: Preferably 0.1 or more, more preferably 0.2 or more, still more preferably 0.5 or more, even more preferably 1.5 or more, even more preferably 2.0 or more, and preferably 20.0 or less, It is more preferably 15.0 or less, still more preferably 12.0 or less, even more preferably 8.0 or less, even more preferably 4.0 or less, even more preferably 3.0 or less.

In the dishwasher detergent composition of the present invention, from the viewpoint of protein detergency, the mass ratio (b)/(c) between the content of component (b) and the content of component (c) is as follows: Preferably 0.01 or more, more preferably 0.05 or more, still more preferably 0.1 or more, even more preferably 0.5 or more, even more preferably 1.2 or more, and preferably 20.0 or less, It is more preferably 15.0 or less, still more preferably 10.0 or less, even more preferably 5.0 or less, even more preferably 3.0 or less.
When the dishwasher detergent composition of the present invention contains component (c1), from the viewpoint of protein detergency, the mass ratio of the content of component (b) to the content of component (c1) is (b)/(c1) is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.2 or more, even more preferably 1.0 or more, even more preferably 1.2 or more. , even more preferably 1.8 or more, and preferably 20.0 or less, more preferably 15.0 or less, even more preferably 12.0 or less, even more preferably 10.0 or less, even more preferably 5. It is less than or equal to 0.

In the dishwasher detergent composition of the present invention, component (a) is preferably 0.0000005% by mass or more, more preferably 0.000001% by mass or more, and even more preferably 0.0000001% by mass or more, from the viewpoint of protein detergency. 00001% by mass or more, even more preferably 0.0001% by mass or more, even more preferably 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably 0.002% by mass or more, and more More preferably 0.004% by mass or more, preferably 20% by mass or less, more preferably 10% by mass or less, even more preferably 8.0% by mass or less, even more preferably 7.0% by mass or less, and even more preferably Preferably, it can be contained in an amount of 6.0% by mass or less.
When preparing a preparation that can be used as it is without dilution (dilute preparation), the dishwasher detergent composition of the present invention preferably contains component (a) in a concentration of 0.05% from the viewpoint of protein detergency. 0000005% by mass or more, more preferably 0.000001% by mass or more, even more preferably 0.00001% by mass or more, even more preferably 0.0001% by mass or more, even more preferably 0.0005% by mass or more, even more preferably is 0.001% by mass or more, even more preferably 0.002% by mass or more, even more preferably 0.004% by mass or more, and preferably 1% by mass or less, more preferably 0.1% by mass or less, and The content is preferably 0.05% by mass or less, even more preferably 0.01% by mass or less, even more preferably 0.008% by mass or less. In addition, even if the preparation has this concentration, it may be used after being diluted.
When preparing a preparation that can be diluted and used (concentrated preparation), the dishwasher detergent composition of the present invention preferably contains component (a) in an amount of, for example, 0.01 mass from the viewpoint of protein detergency. % or more, more preferably 0.05% by mass or more, still more preferably 0.5% by mass or more, even more preferably 2.0% by mass or more, even more preferably 4.0% by mass or more, and preferably 20% by mass or more. It can be contained in an amount of at most 10% by mass, more preferably at most 10% by mass, even more preferably at most 8.0% by mass, even more preferably at most 7.0% by mass, even more preferably at most 6.0% by mass. Note that even formulations at this concentration may be used without being diluted.

In the dishwasher detergent composition of the present invention, the component (b) is preferably 0.0000005% by mass or more, more preferably 0.000001% by mass or more, and still more preferably 0.0000001% by mass or more, from the viewpoint of protein detergency. 00001% by mass or more, even more preferably 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably 0.002% by mass or more, even more preferably 0.01% by mass or more, and , preferably 20% by mass or less, more preferably 19% by mass or less, still more preferably 18% by mass or less.
When preparing a preparation that can be used as it is without dilution (dilute preparation), the dishwasher detergent composition of the present invention preferably contains component (b) at a concentration of 0.05% from the viewpoint of protein detergency. 0000005% by mass or more, more preferably 0.000001% by mass or more, even more preferably 0.00001% by mass or more, even more preferably 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably is 0.002% by mass or more, even more preferably 0.01% by mass or more, and preferably 1% by mass or less, more preferably 0.1% by mass or less, even more preferably 0.02% by mass or less, and even more Preferably, it can be contained in an amount of 0.018% by mass or less. In addition, even if the preparation has this concentration, it may be used after being diluted.
When preparing a preparation that can be diluted and used (concentrated preparation), the dishwasher detergent composition of the present invention preferably contains component (b) in an amount of, for example, 0.001 mass from the viewpoint of protein detergency. % or more, more preferably 0.01% by mass or more, still more preferably 1% by mass or more, even more preferably 2% by mass or more, even more preferably 10% by mass or more, and more preferably 20% by mass or less, more preferably can be contained in an amount of 19% by mass or less, more preferably 18% by mass or less. Note that even formulations at this concentration may be used without being diluted.

In the dishwasher detergent composition of the present invention, component (c) is preferably 0.0000005% by mass or more, more preferably 0.000001% by mass or more, and still more preferably 0.0000001% by mass or more, from the viewpoint of protein detergency. 00001% by mass or more, even more preferably 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably 0.004% by mass or more, and preferably 40% by mass or less, more preferably It can be contained in an amount of 30% by mass or less, more preferably 25% by mass or less, even more preferably 20% by mass or less, even more preferably 12% by mass or less.
When preparing a preparation that can be used as it is without dilution (dilute preparation), the dishwasher detergent composition of the present invention preferably contains component (c) at a concentration of 0.05% from the viewpoint of protein detergency. 0000005% by mass or more, more preferably 0.000001% by mass or more, even more preferably 0.00001% by mass or more, even more preferably 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably is 0.004% by mass or more, and preferably 1% by mass or less, more preferably 0.1% by mass or less, even more preferably 0.05% by mass or less, even more preferably 0.02% by mass or less, and even more preferably Preferably, it can be contained in an amount of 0.012% by mass or less. In addition, even if the preparation has this concentration, it may be used after being diluted.
When preparing a preparation that can be diluted and used (concentrated preparation), the dishwasher detergent composition of the present invention preferably contains component (c) in an amount of, for example, 0.01 mass from the viewpoint of protein detergency. % or more, more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, even more preferably 1% by mass or more, even more preferably 4% by mass or more, and preferably 40% by mass or less, The content is more preferably 30% by mass or less, still more preferably 25% by mass or less, even more preferably 20% by mass or less, even more preferably 12% by mass or less. Note that even formulations at this concentration may be used without being diluted.

In the dishwasher detergent composition of the present invention, the content ranges of component (a), component (b), and component (c) can be set by arbitrarily selecting and combining the above-mentioned values. Can be done. The detergent composition for dishwashers of the present invention includes, for example, component (a) of 0.0000005% by mass or more and 20% by mass or less, component (b) of 0.0000005% by mass or more and 20% by mass or less, and (c) component The content of the component can be 0.0000005% by mass or more and 40% by mass or less. Further, the dishwasher detergent composition of the present invention contains, for example, component (a) of 0.001% by mass or more and 6.0% by mass or less, and component (b) of 0.001% by mass or more and 18% by mass or less. , component (c) may be contained in an amount of 0.001% by mass or more and 20% by mass or less.

From the viewpoint of protein detergency, the dishwasher detergent composition of the present invention has a pH at 25°C of more than 8.0, preferably 8.5 or more, and 11 or less, preferably 10.8. It is as follows. This pH is determined by the following measurement method.
(1) pH measurement method A composite electrode for pH measurement (pH meter (manufactured by Horiba, Ltd., pH/ion meter F-23) using a saturated potassium chloride aqueous solution (3.33 mol/L) as the pH electrode internal solution ( Glass sliding sleeve type (manufactured by Horiba, Ltd.) is connected. Next, fill a 100 mL beaker with each of pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution), Immerse in a constant temperature bath at ℃ for 30 minutes. The pH measurement electrode is immersed in a standard solution adjusted to a constant temperature for 3 minutes, and the calibration operation is performed in the order of pH 6.86 → pH 9.18 → pH 4.01. The dishwasher detergent composition to be measured is adjusted to 25° C., the electrode of the pH meter is immersed in the sample, and the pH is measured after 1 minute.

From the viewpoint of protein detergency, the dishwasher detergent composition of the present invention has a pH at 25° C. of a diluted product diluted with water to a concentration of 0.1% by mass, preferably 6.0 or more, more preferably 6.0 or more. It is 7.0 or more, and preferably 10.9 or less, more preferably 10.5 or less. This pH is determined by the above-mentioned measurement method (however, the dishwasher detergent composition is read as the diluted dishwasher detergent composition).

The dishwasher detergent composition of the present invention preferably contains water from the viewpoint of stability and workability of the composition. Examples of water include, but are not limited to, tap water, well water, ion exchange water, distilled water, and the like. The present water is preferably used in an amount that accounts for the remainder of the composition (an amount that makes the total 100% by mass). The content of water in the composition is, for example, 40% by mass or more, further 45% by mass or more, further 50% by mass or more, further 55% by mass or more, further 60% by mass or more, further 65% by mass or more, and further 70% by mass. % or more. The dishwasher cleaning composition of the invention may be a liquid composition.

The dishwasher detergent composition of the present invention preferably further contains (d) a nonionic surfactant [hereinafter referred to as component (d)] from the viewpoint of protein cleaning properties.
As the nonionic surfactant, polyoxyalkylene alkyl ether [hereinafter referred to as component (d1)] is preferred. The number of carbon atoms in the alkyl group in component (d1) is preferably 10 or more, more preferably 12 or more, and preferably 20 or less, more preferably 18 or less, from the viewpoint of protein detergency. The alkylene oxide in component (d1) preferably contains an alkylene oxide selected from ethylene oxide and propylene oxide from the viewpoint of protein detergency. Further, the average number of moles of alkylene oxide added in component (d1) is preferably 2 or more, more preferably 4 or more, and preferably 20 or less, more preferably 18 or less, from the viewpoint of protein detergency.

Examples of the component (d1) include secondary alcohol alkylene oxide adducts having 10 to 24 carbon atoms. The number of carbon atoms in the secondary alcohol is preferably 10 or more, more preferably 12 or more, and preferably 20 or less, more preferably 18 or less, from the viewpoint of protein detergency. From the viewpoint of protein detergency, the alkylene oxide preferably has 2 or more and 4 or less carbon atoms. From the viewpoint of protein detergency, the alkylene oxide preferably contains an alkylene oxide selected from ethylene oxide and propylene oxide. From the viewpoint of protein detergency, the average number of moles of alkylene oxide added is preferably 2 or more, more preferably 4 or more, and preferably 20 or less, more preferably 18 or less.

In the dishwasher detergent composition of the present invention, component (d) is preferably 0.0000005% by mass or more, more preferably 0.000001% by mass or more, and even more preferably 0.0000001% by mass or more, from the viewpoint of protein detergency. 0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, and preferably 10% by mass or less, more preferably It can be contained in an amount of 5% by mass or less, more preferably 2% by mass or less, even more preferably 1% by mass or less, even more preferably 0.8% by mass or less.

The detergent composition for dishwashers of the present invention includes surfactants, enzymes (proteolytic enzymes, fat-degrading enzymes, saccharide-degrading enzymes, etc.), solvents, hydrotropes, and the like, as long as they do not impair the purpose of the present invention. , dispersants, pH adjusters, thickeners, viscosity modifiers, fragrances, colorants, antioxidants, preservatives, foam suppressants, bleaching agents, bleach activators, etc. (However, (a) to ( d)) may be blended.

The viscosity at 20° C. of the dishwasher detergent composition of the present invention may be, for example, 1200 mPa·s or less, and further 1000 mPa·s or less, from the viewpoint of protein detergency. The lower limit of the viscosity may be 0 mPa·s or more. This viscosity was measured using a B-type viscometer.

In the present invention, tableware is
(i) In addition to so-called tableware such as plates, bowls, cups, chopsticks, knives, forks, and spoons,
(ii) Storage containers such as Tupperware and bottles;
(iii) Cooking utensils such as knives, cutting boards, pots, frying pans, and fish grills;
(iv) Storage or transportation equipment such as racks and containers;
This may include members and equipment that come into contact with foodstuffs such as.

The reason why the detergent composition for a dishwasher of the present invention can improve the cleaning properties of stains containing proteins that are difficult to clean, such as egg yolk protein, is not necessarily clear, but it is presumed as follows.
Conventionally, in order to efficiently clean stains containing proteins by hydrolyzing them, cleaning has been carried out in a strong alkaline region. Furthermore, when a concentrated preparation is considered as a product form, distribution with extremely strong alkali is required, and special operations are also required to treat the preparation container after use. On the other hand, the cleaning mechanism of the dishwasher detergent composition of the present invention against stains containing proteins is that the component (c) contributes to forming a strong protein structure in protein stains. It acts on metal ions, especially calcium ions, that are thought to exist in the protein structure, and by pulling out calcium ions from the protein structure, the strength of the protein structure decreases, and in a liquid state in the neutral or slightly alkaline region ( It is believed that component a) can be dispersed in the cleaning liquid. (b) Because the component has a buffering capacity, the pH fluctuation is small even when used diluted from a concentrated formulation due to product design, and a neutral or weakly alkaline solution is ideal for cleaning food stains containing protein. It is thought that it is possible to easily create a sexual state.
Note that the mechanism of action of the present invention is not limited to these.

<How to wash dishes>
The present invention uses a dishwasher to remove stains containing proteins by using a cleaning liquid containing components (a), (b), and (c) and having a pH of more than 8.0 and less than or equal to 11. To provide a method for washing tableware. The matters described in connection with the dishwasher detergent composition of the present invention can be appropriately applied to the dishwashing method of the present invention. Specific examples and preferred examples of component (a), component (b), component (c), pH, and tableware are also the same as in the detergent composition for a dishwasher of the present invention.

The cleaning liquid may be prepared from the dishwasher detergent composition of the present invention.
The cleaning liquid may be prepared by diluting the dishwasher cleaning composition of the present invention with water.
The cleaning liquid may be prepared by diluting the detergent composition for a dishwasher of the present invention with water more than 1 time, further 300 times or more, and 2000 times or less, and further 1500 times or less.

From the viewpoint of protein cleaning properties, the cleaning liquid contains component (a), for example, preferably 0.0000005% by mass or more, more preferably 0.000001% by mass or more, still more preferably 0.00001% by mass or more, and even more preferably is 0.0001% by mass or more, even more preferably 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably 0.002% by mass or more, even more preferably 0.004% by mass. The above, and preferably 1% by mass or less, more preferably 0.1% by mass or less, even more preferably 0.05% by mass or less, even more preferably 0.01% by mass or less, even more preferably 0.008% by mass. % or less.

From the viewpoint of protein cleaning properties, the cleaning liquid contains component (b), for example, preferably 0.0000005% by mass or more, more preferably 0.000001% by mass or more, still more preferably 0.00001% by mass or more, and even more preferably is 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably 0.002% by mass or more, even more preferably 0.01% by mass or more, and preferably 1% by mass or less, The content is more preferably 0.1% by mass or less, still more preferably 0.02% by mass or less, even more preferably 0.018% by mass or less.

From the viewpoint of protein cleaning properties, the cleaning liquid contains component (c), for example, preferably 0.0000005% by mass or more, more preferably 0.000001% by mass or more, still more preferably 0.00001% by mass or more, and even more preferably is 0.0005% by mass or more, even more preferably 0.001% by mass or more, even more preferably 0.004% by mass or more, and preferably 1% by mass or less, more preferably 0.1% by mass or less, and The content is preferably 0.05% by mass or less, even more preferably 0.02% by mass or less, even more preferably 0.012% by mass or less.

In the present invention, the content ranges of component (a), component (b), and component (c) in the cleaning liquid can be set by arbitrarily selecting and combining the above-mentioned values. From the viewpoint of protein cleaning properties, the cleaning liquid should contain, for example, component (a) from 0.0000005% by mass to 1% by mass, component (b) from 0.0000005% by mass to 1% by mass, and component (c) from 0% to 1% by mass. It can be contained in a range of .0000005% by mass or more and 1% by mass or less. Furthermore, the cleaning liquid contains component (a) from 0.001% by mass to 0.008% by mass, component (b) from 0.002% by mass to 0.018% by mass, and component (c) from 0.001% by mass. % or more and 0.02% by mass or less.

In the tableware cleaning method of the present invention, the cleaning liquid is applied to the tableware from the viewpoint of protein cleaning properties, for example, for 20 seconds or more, further for 30 seconds or more, further for 40 seconds or more, for 600 seconds or less, further for 300 seconds or less, and further for Contact for 180 seconds or less.

In the tableware washing method of the present invention, the temperature of the cleaning liquid can be, for example, 30°C or higher, further 35°C or higher, further 40°C or higher, and 90°C or lower, further 80°C or lower, and further 70°C or lower. .

The protein-containing stain may be a protein-containing stain derived from egg yolk.

The dishwasher may be any dishwasher commonly available on the market, and is typically an automatic dishwasher. Although it is possible to use a household automatic dishwasher, a commercial automatic dishwasher is preferred. When cleaning with a commercial dishwasher, the cleaning composition of the present invention is generally used as a cleaning liquid mixed with water. In this case, a certain amount of the composition is optionally transferred into the commercial dishwasher by a feeding device, and an appropriate concentration of the cleaning liquid is maintained. The cleaning composition of the present invention is supplied, for example, by directly inserting a tube specifically designed for commercial dishwashers into a container made of plastic or the like filled with the composition and sucking it up. The cleaning liquid is then supplied inside the commercial dishwasher.

Using the dishwasher detergent compositions shown in Table 1, the detergency against egg yolk stains was evaluated according to the following procedure. The results are shown in Table 1. Note that the pH of the compositions in Table 1 was adjusted with sodium hydroxide and sulfuric acid as necessary.

(1) The mass (mass A) of an SUS stainless steel bat (external dimensions: width 258 mm x depth 177 mm x height 18 mm, bottom internal dimensions: 235 mm x 155 mm) was measured.
(2) 3 g of egg yolk was applied to the stainless steel vat and dried at room temperature for 3 hours or more.
(3) The mass (mass B) of the stainless steel bat after drying was measured.
(4) Using JWE-400TA manufactured by Hoshizaki Electric Co., Ltd. as a dishwasher, dilute the detergent composition for dishwashers shown in Table 1 with water to 0.1% by mass to prepare a cleaning solution, and use the detergent composition at 60°C. It was washed for 80 seconds, and a few seconds later, it was rinsed for 7 seconds with fresh water at 80°C.
(5) The mass (mass C) of the stainless steel vat after cleaning was measured, and the mass change rate was evaluated as the egg yolk stain cleaning rate. Specifically, the mass change rate is determined by the following formula.
Mass change rate (%) = [[B-C]/[B-A]] x 100

*1 Sodium polyacrylate: “Poise 530” manufactured by Kao Corporation, weight average molecular weight 17,000
*2 secC12-14EO7PO8.5: "Softanol EP7085" manufactured by Nippon Shokubai Co., Ltd., an average of 7 mol of ethylene oxide and an average of 8.5 mol of propylene oxide are added to a secondary alcohol having 12 to 14 carbon atoms in this order. nonionic surfactant

Claims (9)

(a) Alkyl sulfate having 10 to 12 carbon atoms [hereinafter referred to as component (a)] 4% by mass to 10% by mass , (b) alkanolamine [hereinafter referred to as component (b)] 10% by mass to 18% by mass , ( c) one or more compounds selected from polyphosphoric acid, organic carboxylic acids, and salts thereof [hereinafter referred to as component (c) ], and (d) a nonionic surfactant [hereinafter referred to as component (d)]0 Contains .1% by mass or more and 2% by mass or less ,
(b) contains one or more compounds selected from monoethanolamine and monomethanolamine as a component;
(b)/(c), which is the mass ratio between the content of component (b) and the content of component (c), is 0.5 or more and 5.0 or less,
As components (c), (c1) a polycarboxylic acid or a salt thereof [hereinafter referred to as component (c1)] and (c2) a polycarboxylic acid polymer compound or a salt thereof [hereinafter referred to as component (c2)]. Contains
(c1)/(c2), which is the mass ratio between the content of component (c1) and the content of component (c2), is 0.5 or more and 10 or less,
The pH at 25°C is 8.5 or more and 11 or less ,
Cleaning composition for dishwashers. The dishwasher according to claim 1, wherein (b)/(a), which is a mass ratio between the content of component (a) and the content of component (b), is 0.1 or more and 20.0 or less. Cleaning composition for use. The tableware according to claim 1 or 2, wherein the mass ratio (b)/(c1) between the content of the component (b) and the content of the component (c1) is 1.0 or more and 5.0 or less. Cleaning composition for washing machines. Component (d) is a polyoxyalkylene alkyl whose alkyl group has 10 to 18 carbon atoms, contains an alkylene oxide selected from ethylene oxide and propylene oxide, and has an average added mole number of 4 to 20 of the alkylene oxide. The dishwasher detergent composition according to any one of claims 1 to 3 , which is an ether . Claims 1 to 4, wherein component (c1) is one or more compounds selected from citric acid and its salts, and component (c2) is one or more compounds selected from polyacrylic acid and its salts. The dishwasher detergent composition according to any one of the above. Using a dishwasher, (a) an alkyl sulfate having 10 to 12 carbon atoms [hereinafter referred to as component (a)], (b) an alkanolamine [hereinafter referred to as component (b)], and (c) polyphosphoric acid, an organic Contains one or more compounds selected from carboxylic acids and their salts [hereinafter referred to as component (c)] and (d) a nonionic surfactant [hereinafter referred to as component (d)], and has a pH of 8.5 or more11 A method for washing dishes, comprising washing dishes with stains containing proteins, using a washing liquid as follows:
The cleaning liquid contains one or more compounds selected from monoethanolamine and monomethanolamine as component (b),
(b)/(c), which is a mass ratio between the content of component (b) and the content of component (c) in the cleaning liquid, is 0.5 or more and 5.0 or less,
The cleaning liquid contains (c1) a polycarboxylic acid or a salt thereof [hereinafter referred to as component (c1)] and (c2) a polycarboxylic acid polymer compound or a salt thereof [hereinafter referred to as component (c2)] as component (c). ] and
The mass ratio (c1)/(c2) of the content of the component (c1) and the content of the component (c2) in the cleaning liquid is 0.5 or more and 10 or less,
How to wash dishes . 7. The method for washing tableware according to claim 6 , wherein the cleaning liquid is prepared from the dishwasher detergent composition according to any one of claims 1 to 5 . Claim 6 or 7 , wherein the cleaning liquid is prepared by diluting the dishwasher detergent composition according to any one of Claims 1 to 5 with water from 300 times to 2000 times. How to wash tableware as described. The method for washing tableware according to any one of claims 6 to 8 , wherein the protein-containing stain is a protein-containing stain derived from egg yolk.