JP2023043620A - Detergent composition for dishwashers - Google Patents

Abstract

To provide an antifoamer composition for a surfactant-containing composition, which shows excellent antifoaming effect on detergents such as compositions containing surfactant, for example, a detergent composition for dishwashers.SOLUTION: An antifoamer composition for a surfactant-containing composition comprises (a) a sulfosuccinic acid branched alkyl ester having a C9-11 branched alkyl group and (b) a polypropyleneglycol with a weight average molecular weight of 600 or more and 10000 or less as active ingredients.SELECTED DRAWING: None

Description

The present invention relates to foam suppressor compositions for surfactant-containing compositions and detergent compositions for dishwashers.

Compositions containing surfactants are used in various fields, but foaming may be a problem depending on the application. For example, in detergents for dishwashers, if foaming occurs during washing, the machine will stop and the problem will arise that washing cannot be done. Therefore, only a very small amount of low-foaming surfactant can be used, and there is a problem that the expected detergency for oil stains cannot be obtained. Generally, in order to solve such problems, a technique using an antifoaming agent is applied.

Conventionally, various dishwashing agents with reduced foaming have been proposed.
Patent Document 1 discloses a detergent composition for automatic dishwashers containing a polypropylene glycol (A) having a number average molecular weight of 4,500 or more and 50,000 or less and a fatty acid ester type nonionic surfactant (B). wherein the content of component (A) is 0.5% by mass or more and 10% by mass or less, and the mass ratio [(A)/(B)] of component (A) to component (B) is 0 Disclosed is an automatic dishwashing detergent composition that is greater than or equal to .2 and less than or equal to 5.0.
In Patent Document 2, (a) 1.5% by mass or more of an anionic surfactant having an alkyl group or alkenyl group having 10 carbon atoms, (b) (meth)acrylic acid and (meth)acrylic acid ester and water, wherein said composition is a dispersion.
Patent Document 3 discloses a) from about 0.1% to about 20% by weight of a high foaming surfactant exhibiting a specific foaming behavior and b) from about 0.5% to about 15% by weight of a specific c) from about 0.001% to about 5% by weight of a specific suds suppressor; and d) from about 1% to about 50% of a builder. Disclosed is an automatic dishwashing detergent composition comprising and exhibiting specific foam behavior.
Patent Document 4 discloses (A) an anionic surfactant containing one or more (a1) selected from secondary alkanesulfonates, dialkylsulfosuccinates and specific compounds, and (B) an amine oxide surfactant (C) a protease and (D) an amylase, wherein the mass ratio represented by (A)/(B) is 0.7 to 2. It is

JP 2014-129493 A JP 2018-83862 A JP 2017-141478 A JP 2020-100745 A

An antifoaming agent is an oily component with a low surface tension, such as silicone, and if used in a large amount in a detergent, it may cause staining. However, depending on the composition of the cleaning agent, it may be difficult to uniformly blend a small amount of the antifoaming agent, or it may be difficult to achieve a sufficient antifoaming effect with a small amount of the antifoaming agent.

The present invention provides a foam inhibitor for surfactant-containing compositions that exhibits excellent foam-inhibiting effects on various surfactant-containing compositions, such as detergent compositions for dishwashers. Regarding the composition.

The present invention provides a surfactant containing (a) a branched alkyl sulfosuccinate having a branched alkyl group having 9 to 11 carbon atoms and (b) polypropylene glycol having a weight average molecular weight of 600 to 10000 as active ingredients. The present invention relates to defoamer compositions for containing compositions.

The present invention also provides (a) a branched alkyl sulfosuccinate having a branched alkyl group having 9 to 11 carbon atoms [hereinafter referred to as component (a)], and (b) polypropylene glycol having a weight average molecular weight of 600 to 10,000. [hereinafter referred to as component (b)] and (c) a surfactant [excluding component (a)] [hereinafter referred to as component (c)].

INDUSTRIAL APPLICABILITY According to the present invention, a foam suppressing agent for a surfactant-containing composition that exhibits excellent foam suppressing effects on various surfactant-containing compositions, such as detergent compositions for dishwashers. A composition is provided.

[Foam inhibitor composition for surfactant-containing composition]
The foam suppressing composition for a surfactant-containing composition of the present invention can impart a foam suppressing effect to a composition containing a surfactant. Components (a) and (b) are active ingredients of the foam inhibitor composition of the present invention that provide such effects.

Component (a) is a sulfosuccinic acid branched alkyl ester having a branched alkyl group having 9 to 11 carbon atoms.

Component (a) includes monoester and diester esters. Preferred are sulfosuccinic acid branched alkyl diesters in which the branched alkyl group has from 9 to 11 carbon atoms.

The branched alkyl group of component (a) is preferably a branched alkyl group having a main chain of 6 or 7 carbon atoms and one or more side chains and having a total of 3 or 4 carbon atoms in the side chains.
The branched alkyl group of component (a) is a branched alkyl group selected from a 2-propylheptyl group, a 4-methyl-2-propylhexyl group, a 5-methyl-2-propylhexyl group, and a 3,5,5-trimethylhexyl group. A branched alkyl group selected from a 2-propylheptyl group and a 3,5,5-trimethylhexyl group is preferred.

Component (a) includes sulfosuccinic acid branched alkyl esters represented by the following general formula (a1).

[In the formula, R ^1a and R ^2a are each independently a branched alkyl group having 9 or more and 11 or less carbon atoms. A ¹ and A ² each independently represent an alkylene group having 2 or more and 4 or less carbon atoms, x and y each independently represent an average number of added moles of 0 or more and 6 or less. ^M1 is a hydrogen atom or a cation. ]

Furthermore, the component (a) includes sulfosuccinic acid branched alkyl esters represented by the following general formula (a1-1). This compound is a compound of the general formula (a1) where x=0 and y=0.

[In the formula, R ^1a and R ^2a are each independently a branched alkyl group having 9 or more and 11 or less carbon atoms. ^M1 is a hydrogen atom or a cation. ]

The following description can be applied to each of general formula (a1) and general formula (a1-1).
The number of carbon atoms in R ^1a and R ^2a may be the same or different.
In the present invention, a hydrocarbon residue obtained by removing a hydroxyl group from a secondary alcohol is included in the chain-branched hydrocarbon group.

In the present invention, among the chain branched hydrocarbon groups represented by R ^1a and R ^2a , the hydrocarbon chain having the largest number of carbon atoms counted from the carbon atoms bonded to the oxygen atom is used as the main chain, and branched from the main chain The attached hydrocarbon chains are side chains.
When two or more main chains are conceivable, that is, when there are two or more hydrocarbon chains with the largest number of carbon atoms (hereinafter also referred to as longest hydrocarbon chains), the main chains are determined in the following order.
1. The side chain branched from the longest hydrocarbon chain and having the larger number of carbon atoms is taken as the main chain.
2. Next, when the number of carbon atoms of the side chains branched from the longest hydrocarbon chain is the same, the side chain branched from the longest hydrocarbon chain with the larger number of side chains is taken as the main chain.
3. Next, when the number of side chains branching from the longest hydrocarbon chain is the same, the main chain is the side chain on the carbon atom closer to the oxygen atom, counting from the carbon atom bonded to the oxygen atom. do.
4. Next, when the positions of the carbon atoms having side chains closest to the oxygen atom are the same, the side chain closest to the oxygen atom with the greater number of carbon atoms is taken as the main chain.
When two or more longest hydrocarbon chains have the same symmetrical structure, either of them may be the main chain.

In each of the branched alkyl groups of R ^1a and R ^2a , the total number of carbon atoms constituting the side chains may be the same or different, and is preferably 3 from the viewpoint of antifoaming properties.
In the present invention, the total number of carbon atoms constituting a side chain is the total number of carbon atoms in all side chains other than the main chain in one branched alkyl group. It is the total number of carbon atoms in the side chain.

The number of side chains of R ^1a and R ^2a may be the same or different, and is 1 or more, preferably 3 or less, more preferably 2 or less from the viewpoint of foam suppression.
In the present invention, the number of side chains is the number of side chains branched from the main chain, and the number of side chains does not change even if the side chain further has a side chain branched from the side chain. . However, from the viewpoint of antifoaming properties, the side chain may further have a side chain branched from the side chain.

The number of branched carbon atoms in R ^1a and R ^2a may be the same or different, and is 1 or more, preferably 3 or less, and still more preferably 2 or less from the viewpoint of antifoaming properties.
In the present invention, the number of branched carbon atoms is the total number of tertiary carbon atoms and quaternary carbon atoms in the chain branched hydrocarbon group.

In a preferred embodiment of R ^1a and R ^2a , the chain branched hydrocarbon group of R ^1a and R ^2a each independently has a total carbon number of 9 or more and 11 or less, more preferably 9 or 10, and the main chain has a carbon number of are each independently 6 or 7, the number of carbon atoms constituting the side chains is each independently 1 or more and 3 or less, and the number of side chains is each independently 1.

The branched alkyl groups of R ^1a and R ^2a may be the same or different, and are specifically 2-propylheptyl group, 4-methyl-2-propylhexyl group, 5-methyl-2-propylhexyl group, and 3 , 5,5-trimethylhexyl group.

In general formula (a1), A ¹ and A ² are each independently an alkylene group having 2 or more carbon atoms and 4 or less carbon atoms, preferably 3 or less carbon atoms.
In the general formula (a1), x and y are the average number of added moles, and from the viewpoint of foam suppression, they are each independently 0 or more and 6 or less, preferably 4 or less, more preferably 2 or less. , and more preferably 0.
In addition, x+y is preferably 0 or more, preferably 12 or less, more preferably 6 or less, still more preferably 3 or less, and still more preferably 0, from the viewpoint of foam suppression.

In the general formula (a1), M ¹ is a hydrogen ion, an inorganic cation such as sodium ion, ammonium ion, potassium ion, magnesium ion, monoethanolammonium ion, diethanolammonium ion, triethanolammonium ion, morpholinium ion and preferably inorganic cations selected from sodium ions, ammonium ions, potassium ions and magnesium ions.

In the general formula (a1), the method for preparing compounds in which R ^1a and R ^2a are the same is not particularly limited, but for example, refer to the method described in US Pat. Also, as a method for preparing an asymmetric compound having different R ^1a and R ^2a , for example, JP-A-58-24555 can be referred to. As a raw material for the component (a), an alcohol having a predetermined number of carbon atoms to which an alkylene oxide is added can also be used.
Alcohols suitable for use in the production of the component (a) of the present invention include:
(1) primary alcohols typified by 3,5,5-trimethylhexan-1-ol, 2-propylheptan-1-ol, etc.;
(2) secondary alcohols such as 5-nonanol and 2,6-dimethyl-4-heptanol;

The foam inhibitor composition for a surfactant-containing composition of the present invention contains the component (a), from the viewpoint of foam suppression, for example, 1% by mass or more, further 5% by mass or more, further 10% by mass or more, and From the viewpoint of storage stability, the content may be, for example, 80% by mass or less, further 70% by mass or less, and further 60% by mass or less. In the present invention, the description (% by mass, etc.) regarding the amount of component (a) is the mass of the compound converted to sodium salt, for example, the mass when M ¹ in the general formula (a1) is assumed to be sodium. shall be based on

Component (b) is a polypropylene glycol having a weight average molecular weight of 600 or more and 10,000 or less.
The weight-average molecular weight of component (b) is preferably 1000 or more, more preferably 2000 or more, and preferably 8000 or less, more preferably 5000 or less, from the viewpoint of antifoaming properties. Here, the weight average molecular weight of component (b) is calculated based on the measurement of the hydroxyl value (mgKOH/g). Specifically, the weight average molecular weight of component (b) can be calculated by (m×1000×56/OHV). Here, m is the number of hydroxyl groups of polypropylene glycol, m is 2 when polypropylene glycol is diol type, and m is 3 when it is triol type. OHV (mgKOH/g) is a hydroxyl value measured according to JISK0070.

The foam inhibitor composition for a surfactant-containing composition of the present invention contains the component (b), from the viewpoint of foam suppression, for example, 20% by mass or more, further 30% by mass or more, further 40% by mass or more, and From the viewpoint of storage stability, it can be contained in an amount of, for example, 99% by mass or less, further 90% by mass or less, and further 80% by mass or less.

In the foam inhibitor composition for a surfactant-containing composition of the present invention, (a)/(b), which is the mass ratio of the content of component (a) to the content of component (b), is From the viewpoint of sexuality, the is 1.5 or less.

The suds suppressor compositions for surfactant-containing compositions of the present invention optionally contain sequestering agents, dyes, fragrances, enzymes, bleaching agents, surface modifiers, disinfectants, antioxidants, preservatives, stabilizing agents. Optional ingredients such as modifiers, pH adjusters and solvents may also be included.

The foam inhibitor composition for a surfactant-containing composition of the present invention contains components (a) and (b) as active ingredients. The foam inhibitor composition for surfactant-containing compositions of the present invention includes a foam inhibitor composition for detergents, a foam inhibitor composition for hard surface detergent compositions, and a detergent composition for dishwashers. It is suitable as a foaming agent composition and as a foam suppressing composition for surface functionalizing compositions.

[Detergent composition for dishwasher]
TECHNICAL FIELD The present invention relates to a detergent composition for dishwashers containing components (a), (b) and (c). To the dishwashing machine detergent composition of the present invention, the items described in the foam inhibitor composition for surfactant-containing compositions of the present invention can be appropriately applied. Specific examples and preferred examples of the components (a) and (b) in the detergent composition for dishwashers of the present invention are also the same as those of the surfactant-containing composition of the present invention. .

The detergent composition for dishwashers of the present invention contains the component (a), from the viewpoint of foam suppression, for example, 0.01% by mass or more, further 0.05% by mass or more, further 0.1% by mass or more, From the viewpoint of storage stability, the content may be, for example, 10% by mass or less, 7% by mass or less, 5% by mass or less, and 3% by mass or less.
The detergent composition for dishwashers of the present invention contains the component (b), from the viewpoint of foam suppression, for example, 0.1% by mass or more, further 0.3% by mass or more, further 0.5% by mass or more, From the viewpoint of storage stability, the content may be, for example, 5% by mass or less, further 4% by mass or less, and further 3% by mass or less.

In the dishwashing machine detergent composition of the present invention, (a)/(b), which is the mass ratio of the content of component (a) to the content of component (b), is determined from the viewpoint of foam suppression. , preferably 0.01 or more, more preferably 0.05 or more, still more preferably 0.1 or more, and preferably 5 or less, more preferably 4 or less, still more preferably 3 or less.

Component (c) is a surfactant [excluding component (a)].
Component (c) includes one or more surfactants selected from anionic surfactants [excluding component (a)] and nonionic surfactants.

Examples of the anionic surfactant include a sulfate type anionic surfactant having a hydrocarbon group having 8 to 14 carbon atoms, a sulfonic acid type anionic surfactant having a hydrocarbon group having 8 to 14 carbon atoms, Carboxylic acid type anionic surfactants can be mentioned.

Examples of the hydrocarbon group of the sulfate ester type anionic surfactant having a hydrocarbon group having 8 to 14 carbon atoms include an alkyl group and an alkenyl group. Examples of the sulfate type anionic surfactants include alkyl sulfate salts having an alkyl group having 10 or more and 12 or less carbon atoms. Examples of the sulfate type anionic surfactant include octyl sulfate, decyl sulfate, dodecyl sulfate, and tetradecyl sulfate. Salts include alkali metal salts such as sodium salts and potassium salts.

Examples of the hydrocarbon group of the sulfonic acid-type anionic surfactant having a hydrocarbon group having 8 to 14 carbon atoms include an alkyl group and an alkenyl group. Examples of the sulfonic acid-type anionic surfactants include alkylsulfonates having a primary or secondary alkyl group having 10 or more and 14 or less carbon atoms. Examples of the sulfonic acid-type anionic surfactant include octyl sulfonate, decyl sulfonate, dodecyl sulfonate, and tetradecyl sulfonate. Salts include alkali metal salts such as sodium salts and potassium salts.

The carboxylic acid of the carboxylic acid-type anionic surfactant may have 8 or more and 14 or less carbon atoms. The carboxylic acid may be a monovalent carboxylic acid. Carboxylic acid type anionic surfactants include octanoate, desylate, dodecylate, tetradecylate and the like. Salts include alkali metal salts such as sodium salts and potassium salts.

Examples of nonionic surfactants include (1) alkoxylate-type nonionic surfactants having a hydrocarbon group having 8 to 14 carbon atoms, such as polyoxyalkylene monoalkyl or alkenyl ethers, (2) alkyl monoglyceryl ethers, (3) Alkyl (poly)glycoside (glycoside-type nonionic surfactant), (4) Sorbitan-based nonionic surfactant, (5) Aliphatic alkanolamide, (6) Fatty acid monoglyceride, (7) Sucrose fatty acid ester, (8) Amidates of alkanolamines such as monoethanolamine, diethanolamine and methylmonoethanolamine with fatty acids such as lauric acid and myristic acid. As the nonionic surfactant, (1) an alkoxylate-type nonionic surfactant having a hydrocarbon group having 8 or more and 14 or less carbon atoms is preferable.

The hydrocarbon group of the alkoxylate-type nonionic surfactant having a hydrocarbon group having 8 to 14 carbon atoms includes an alkyl group and an alkenyl group. The alkoxylate-type surfactants include polyoxyalkylene monoalkyl or alkenyl ethers. Specific examples of the alkoxylate surfactant include polyoxyethylene octyl ether, polyoxyethylene decyl ether, polyoxyethylene dodecyl ether, and polyoxyethylene tetradecyl ether. The average added mole number of oxyalkylene groups and further oxyethylene groups in the alkoxylate surfactant may be, for example, 1 or more, further 5 or more, and 50 or less, furthermore 30 or less.

Component (c) includes a sulfate ester type anionic surfactant having a hydrocarbon group of 8 to 14 carbon atoms, a sulfonic acid type anionic surfactant having a hydrocarbon group of 8 to 14 carbon atoms, and One or more surfactants selected from alkoxylate-type nonionic surfactants having a hydrocarbon group of 8 to 14 carbon atoms are preferred.

The detergent composition for dishwashers of the present invention contains, from the viewpoint of cleaning performance, the component (c) in an amount of, for example, 0.01% by mass or more, further 0.05% by mass or more, further 0.1% by mass or more, and , from the viewpoint of storage stability, it can be contained in an amount of, for example, 10% by mass or less, further 5% by mass or less, and further 3% by mass or less. In the present invention, among the component (c), the description (% by mass, etc.) regarding the amount of the anionic surfactant is based on the mass of the compound in terms of sodium salt.

From the viewpoint of cleaning performance and foam suppression, the detergent composition for dishwashing machines of the present invention has a total content of component (c), component (a), and component (b). The mass ratio (c) / [(a) + (b)] is, for example, 0.001 or more, further 0.005 or more, further 0.01 or more, and 10 or less, further 5 or less, and further 3 or less.

The detergent composition for dishwashers of the present invention can contain a sequestering agent as component (d).
(d) Components include citric acid, malic acid, tartaric acid, succinic acid, methylglycinediacetic acid, glutamic diacetic acid, hydroxyethyliminodiacetic acid, ethylenediaminedisuccinic acid, nitrilotriacetic acid, and 1,3-propanediaminetriacetic acid. , 1,3-diamino-2-hydroxypropanetetraacetic acid, glycoletherdiaminetetraacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraaminehexaacetic acid, dihydroxyethylglycine, and hydroxyethylethylenediaminedicarboxymethylglutamic acid. Carboxylic acid or its salt, tripolyphosphoric acid or its salt can be used. Salts of component (d) include alkali metal salts such as sodium salts and potassium salts.
Component (d) is preferably one or more selected from citric acid, malic acid, ethylenediaminetetraacetic acid, methylglycine diacetic acid, glutamic acid diacetic acid, tripolyphosphoric acid, and salts thereof. Citric acid, trisodium citrate, Glutamate diacetic acid and one or more selected from salts thereof are more preferable. When the detergent composition for dishwashers of the present invention contains component (d), the composition contains component (d), for example , 2 mass % or more, further 5 mass % or more, further 10 mass % or more, and 30 mass % or less, further 25 mass % or less, further 20 mass % or less.

The detergent composition for dishwashers of the present invention can contain an inorganic peroxide as component (e).
Component (e) includes sodium percarbonate, perborate (monohydrate or tetrahydrate), percarbonate, persulfate, persilicate and the like.
Component (e) is more preferably one or more inorganic peroxides selected from sodium percarbonate, sodium persulfate, and sodium perborate. , the composition contains component (e) in an amount of 5 mass% or more, further 10 mass% or more, further 15 mass% or more, and 40 mass% or less, further 35 mass% or less, and further 30 mass% or less. can do.
When the detergent composition for dishwashers of the present invention contains component (e), the composition contains component (e) in an amount of, for example, 5% by mass or more, further 10% by mass or more, further 20% by mass or more. , and 40% by mass or less, further 35% by mass or less, and further 30% by mass or less.

The dishwasher detergent composition of the present invention may optionally contain sequestering agents, pigments, fragrances, enzymes, bleaching agents, surface modifiers, disinfectants, antioxidants, preservatives, thickeners, stabilizing agents. Optional components such as an agent, an alkali agent, a pH adjuster, a solvent, and a processing agent (water, mirabilite) may also be included.

The detergent composition for dishwashers of the present invention is preferably a solid composition such as powder, granules and granules. It is often difficult to uniformly blend a small amount of a conventional foam inhibitor or defoamer in such a solid composition, but in the present invention, components (a) and (b) can be added to the dishwashing detergent composition as an active ingredient of the foam inhibitor composition to impart an excellent foam inhibitory effect even to such a solid composition.

From the viewpoint of detergency, the dishwashing detergent composition of the present invention preferably has a pH of 0.2% by mass diluted with water at 25°C of preferably 5 or more, more preferably 5.5 or more, More preferably 6 or more, preferably 12 or less, more preferably 11.5 or less, and even more preferably 11 or less. In addition, pH can be measured by a glass electrode method.

In the present invention, a method of diluting the detergent composition for dishwashers of the present invention with water, for example, 10 times or more and less than 10000 times, further 50 times or more and less than 5000 times to prepare a washing liquid, and using it for washing is preferable. is.

The detergent composition for dishwashers of the present invention is used for washing dishes with a dishwasher. Examples of tableware include items such as plates, bowls, cups, etc. used for storing food, and items such as chopsticks, forks, knives, spoons, etc. used for serving food. In the present invention, tableware includes, in addition to these items, storage containers such as Tupperware and bottles, cooking utensils such as kitchen knives, cutting boards, pots, frying pans, and fish grills, and food products such as cooking appliances such as food processors and mixers. It may mean an article or parts thereof that come into contact with and that can be washed in a dishwasher. Materials for tableware include plastic (including silicone resin, etc.), metal, pottery, wood, and combinations thereof. The detergent composition for dishwashers of the present invention is suitably used for washing tableware having a hydrophobic surface, such as plastic tableware. Washing using the detergent composition of the present invention conforms to washing with a normal dishwasher.

The components shown in Tables 1 and 2 were blended with the basic powder composition or the basic liquid composition in the proportions shown in the table to prepare detergent compositions for dishwashers. In the table, components (a) and (b) are blended as active ingredients of foam inhibitors for surfactant-containing compositions. Here, the base powder composition contained 11% by weight sodium citrate, 45% by weight sodium carbonate, and the balance sodium sulfate (mirabilite) (total of 100% by weight). The base liquid composition also contained 0.5 wt% xanthan gum, 6 wt% citric acid, and the balance water (100 wt% total). Foaming of the dishwasher detergent composition was evaluated by the following method. The results are shown in the table.

<Evaluation method for foaming>
Put 30 mL of an aqueous solution containing a detergent composition for dishwashers in the table at a concentration of 0.2% by mass in a colorimetric tube, stopper it and manually shake it up and down 30 times, and immediately after foaming (foaming layer thickness) was measured. In this evaluation, the smaller the foaming value, the better the foam suppressing property. The detergent compositions for dishwashing machines of Examples have lower foaming values than the detergent compositions for dishwashing machines of Comparative Examples, and the Examples are more excellent in suppressing foaming than the Comparative Examples. For example, the composition of the example has a low foaming value, and when actually used in a dishwasher, it can reduce the risk of foaming affecting the normal operation of the dishwasher.

The components in the table have the following meanings.
· A-1: di (2-propylheptyl) sodium sulfosuccinate · A'-1: di (2-ethylhexyl) sodium sulfosuccinate · PPG: polypropylene glycol, weight average molecular weight 3000
・C12-AS: alkyl (12 carbon atoms) sodium sulfate ・C10-AS: sodium alkyl (10 carbon atoms) sulfate ・SAS: alkane (14 to 17 carbon atoms) sodium sulfonate ・POE alkyl ether: polyoxyethylene Alkyl ether (alkyl group with 12 carbon atoms, average added mole number of ethylene oxide: 5)

Claims (8)

(a) sulfosuccinic acid branched alkyl ester having a branched alkyl group having 9 to 11 carbon atoms [hereinafter referred to as component (a)], and (b) polypropylene glycol having a weight average molecular weight of 600 to 10000 [component (b) hereinafter ] as an active ingredient, a foam inhibitor composition for a surfactant-containing composition. The surfactant-containing composition according to claim 1, wherein the mass ratio (a)/(b) of the content of component (a) to the content of component (b) is 0.01 or more and 5 or less. antifoam composition for use. (a) sulfosuccinic acid branched alkyl ester having a branched alkyl group having 9 to 11 carbon atoms [hereinafter referred to as component (a)], and (b) polypropylene glycol having a weight average molecular weight of 600 to 10000 [component (b) hereinafter and (c) a surfactant [excluding component (a)] [hereinafter referred to as component (c)]. 3. The branched alkyl group of the component (a) is a branched alkyl group having a main chain of 6 or 7 carbon atoms and one or more side chains and a total of 3 or 4 carbon atoms in the side chains. The detergent composition for dishwashers according to . 5. The dishwashing detergent composition according to claim 3, wherein the branched alkyl group of component (a) is a branched alkyl group selected from 2-propylheptyl and 3,5,5-trimethylhexyl groups. . The mass ratio (a)/(b) between the content of component (a) and the content of component (b) is 0.01 or more and 5 or less, according to any one of claims 3 to 5. dishwashing detergent composition. 7. The component (c) according to any one of claims 3 to 6, wherein the component (c) is one or more surfactants selected from anionic surfactants [excluding component (a)] and nonionic surfactants. A detergent composition for dishwashers. Component (c) is a sulfate ester type anionic surfactant having a hydrocarbon group with 8 to 14 carbon atoms, a sulfonic acid type anionic surfactant having a hydrocarbon group with 8 to 14 carbon atoms, and carbon The detergent for dishwashers according to any one of claims 3 to 7, which is one or more surfactants selected from alkoxylate-type nonionic surfactants having a number of 8 or more and 14 or less hydrocarbon groups. Composition.