Detergent composition

Abstract

The present invention provides a cleansing agent composition that excels in lathering during washing and rinsing without leaving a sticky residue, provides a uniformly smooth coating on the hair after rinsing, and is less likely to cause stiffness or roughness in the hair. [Solution] The detergent composition comprises (A) 1% to 20% by mass of an anionic surfactant, (B) 1% to 20% by mass of an amphoteric surfactant, (C) 0.01% to 2% by mass of glycerin monoalkyl ether and / or glycerin monofatty acid ester, and (D) 0.0005% to 0.5% by mass of a copolymer containing 2 mol% to 30 mol% of the constituent unit represented by formula (1), 50 mol% to 95 mol% of the constituent unit represented by formula (2), and 1 mol% to 20 mol% of the constituent unit represented by formula (3).

Description

[Technical Field]

[0001] This invention relates to a detergent composition. [Background technology]

[0002] Detergent compositions used on skin and hair require both good lathering and quick rinsing. To address these requirements, Patent Document 1 proposes a hair cleansing composition combining N-acyl amino acid surfactants, amphoteric surfactants, fatty acids, and cationic polymers. Patent Document 2 proposes a shampoo composition combining anionic surfactants, cationic polymers, silicone compounds, and gloss enhancers. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-83848 [Patent Document 2] International Publication No. 2014 / 073456 [Overview of the project] [Problems that the invention aims to solve]

[0004] After washing with shampoo or other cleansing agents, it's common practice to use treatments and hair oils to give hair a pleasant feel, such as smoothness and manageability. However, in recent years, there has been a growing demand for care for hair damaged by bleaching, hair coloring, perms, and other treatments. Damaged hair is more susceptible to further damage from washing. Therefore, even before using treatments or other cosmetics, a poor hair texture can lead to discomfort. Thus, there is a demand for hair with a superior texture even when wet after washing with shampoo or other cleansing agents.

[0005] However, while the cleansing compositions described in Patent Documents 1 and 2 above excel in lathering and rinsing during washing, they often lack sufficient smooth coating on wet hair, which can leave hair feeling stiff. Therefore, further improvement in the feel of wet hair before using a treatment is needed.

[0006] The present invention aims to solve the above-mentioned problems. The present invention aims to provide a cleansing agent composition that is excellent in lathering during washing and does not leave a sticky feeling during rinsing, gives the hair a smooth coating after rinsing, and is less likely to cause stiffness in the hair. [Means for solving the problem]

[0007] Through diligent research by the present inventors, it has been found that the above problems can be solved by a detergent composition containing predetermined amounts of (A) an anionic surfactant, (B) an amphoteric surfactant, (C) glycerin monoalkyl ether and / or glycerin monofatty acid ester, and (D) a specific copolymer.

[0008] In other words, the present invention provides a detergent composition comprising: (A) 1% to 20% by mass of an anionic surfactant; (B) 1% to 20% by mass of an amphoteric surfactant; (C) 0.01% to 2% by mass of glycerin monoalkyl ether and / or glycerin monofatty acid ester; and (D) 0.0005% to 0.5% by mass of a copolymer containing 2 mol% to 30 mol% of a structural unit represented by the following formula (1), 50 mol% to 95 mol% of a structural unit represented by the following formula (2), and 1 mol% to 20 mol% of a structural unit represented by the following formula (3). [ka] (In formula (1), R 1 (This indicates a hydrogen atom or a methyl group.) [ka] (In formula (2), R 2(where X represents a hydrogen atom or a methyl group, and X represents a hydrogen atom or an alkali metal atom.) [ka] (In formula (3), R 3 R represents a hydrogen atom or a methyl group. 4 (This indicates an alkyl group with 1 to 22 carbon atoms.) [Effects of the Invention]

[0009] The cleansing agent composition of the present invention exhibits excellent lathering during washing and a lack of stickiness on the hair during rinsing. Furthermore, it is possible to provide a uniformly smooth film-like feel to the hair after rinsing, and it is less likely to cause stiffness in the hair. Therefore, the feel of wet hair before using conditioner is excellent. [Modes for carrying out the invention]

[0010] The embodiments of the present invention will be described below, but the present invention is not limited to the embodiments described herein and can be modified in various ways without departing from the spirit of the invention.

[0011] In this specification, numerical ranges defined using the symbol "~" include the numbers at both ends (upper and lower limits) of "~". For example, "2~5" means 2 or greater and 5 or less. Furthermore, within the numerical ranges described herein, the upper or lower limits of those ranges may be replaced with values ​​shown in the examples or values ​​uniquely derived from the examples.

[0012] The detergent component of the present invention comprises a predetermined amount each of (A) an anionic surfactant, (B) an amphoteric surfactant, (C) a glycerin monoalkyl ether and / or a glycerin monofatty acid ester, and (D) a copolymer containing a predetermined structural unit. The detergent composition may further contain other components as long as they do not impair the purpose and effects of the present invention. Each component will be described below.

[0013] [(A) Anionic surfactants] Examples of the anionic surfactant (A) used in the present invention include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkyl amide ether sulfates, polyoxyethylene amide ether sulfates, polyoxyethylene alkyl ether acetates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, α-olefin sulfonates, higher fatty acid salts, N-acyl amino acid salts, N-acyl isethionate salts, N-acyl methyl taurine salts, N-acyl polypeptide salts, alkyl sulfosuccinates, and the like. Among these, polyoxyethylene alkyl ether sulfates, N-acyl methyl taurine salts, and N-acyl amino acid salts are preferred. The number of carbon atoms of the above alkyl group or acyl group is preferably 8 to 18, more preferably 10 to 14. The alkyl group or acyl group may be derived from a saturated fatty acid or an unsaturated fatty acid. It may also be derived from a mixed fatty acid which is a mixture of a plurality of saturated fatty acids and / or unsaturated fatty acids. Examples of the mixed fatty acid include coconut oil fatty acid, palm kernel oil fatty acid, and the like.

[0014] Examples of the counter ion of the anion in the anionic surfactant (A) include alkali metals, alkaline earth metals, ammonium, alkanolamines, and basic amino acids. The detergent composition may contain only one kind of the anionic surfactant (A) or may contain two or more kinds.

[0015] More specifically, examples of the anionic surfactant (A) include sodium PEG(2) lauryl ether sulfate, sodium caproyl methyl taurine, sodium cocoyl methyl taurine, sodium cocoyl methyl taurine taurine, sodium cocoyl glutamate, and sodium lauroyl methyl alanine. Among these, sodium cocoyl methyl taurine and sodium lauroyl methyl alanine are preferred.

[0016] (A) The content of the anionic surfactant ((when multiple types of (A) anionic surfactants are included, the total amount thereof) may be 1% by mass or more and 20% by mass or less with respect to the total amount of the detergent composition, preferably 4 to 16% by mass, and more preferably 8 to 12% by mass. If the content of the (A) anionic surfactant is too small, foaming may decrease, but if it is 1% by mass or more, foaming tends to be good. On the other hand, if the content of the (A) anionic surfactant is too large, it may be likely to feel slimy during rinsing, but if it is 20% by mass or less, sliminess is less likely to occur.)

[0017] [(B) Amphoteric surfactant] The (B) amphoteric surfactant used in the present invention has both a cationic group and an anionic group. Examples of the (B) amphoteric surfactant include alkyl betaine, alkyl amide betaine, alkyl hydroxy sulfobetaine, alkyl amide hydroxy sulfobetaine, alkyl carboxymethyl hydroxyethyl imidazolinium betaine, alkyl amide hydroxyethyl amino acid type amphoteric surfactant, alkyl iminodiacetate, etc. Among these, alkyl betaine, alkyl amide betaine, and alkyl iminodiacetate are preferable. The number of carbon atoms of these alkyl groups or acyl groups is preferably 8 to 18, and more preferably 10 to 14. The alkyl group or acyl group may be derived from a saturated fatty acid or an unsaturated fatty acid. Further, it may be derived from a mixed fatty acid which is a mixture of a plurality of saturated fatty acids and / or unsaturated fatty acids. Examples of the mixed fatty acid include coconut oil fatty acid, palm kernel oil fatty acid, etc. The detergent composition may contain only one kind of the (B) amphoteric surfactant or two or more kinds thereof.)

[0018] (B) More specifically, examples of the amphoteric surfactant include lauryl betaine, stearyl betaine, cocamidopropyl betaine, palm kernel oil fatty acid amide propyl betaine, lauryl hydroxy sulfobetaine, cocamidopropyl betaine, sodium cocoamphoacetate, etc. Among these, stearyl betaine and cocamidopropyl betaine are preferable.)

[0019] (B) The content of amphoteric surfactants (or the total amount if multiple types of amphoteric surfactants are included) should be 1% by mass or more and 20% by mass or less of the total amount of the detergent composition, preferably 4 to 16% by mass, and more preferably 6 to 10% by mass. If the content of amphoteric surfactants is too low, foaming may decrease, but if it is 1% by mass or more, foaming tends to be good. Also, if the content of amphoteric surfactants is too high, a slimy feeling may occur during rinsing, but if it is 20% by mass or less, a slimy feeling is less likely to occur.

[0020] [(C) component] The component (C) used in the present invention is a glycerin monoalkyl ether and / or a glycerin monofatty acid ester. That is, it may be one or more selected from glycerin monoalkyl ethers and glycerin monofatty acid esters. The detergent composition may contain only one component (C), or two or more. Furthermore, it may contain only one or two or more of either glycerin monoalkyl ethers and glycerin monofatty acid esters, or both.

[0021] The glycerin monoalkyl ether is not particularly limited as long as it is commonly used in cosmetics, but a monoether of glycerin with an alcohol having 6 to 12 carbon atoms is preferred. Specific examples include glycerin monohexyl ether, glycerin mono-2-ethylhexyl ether, and glycerin monooctyl ether, with glycerin mono-2-ethylhexyl ether being the most preferred.

[0022] The glycerin monofatty acid ester is not particularly limited as long as it is commonly used in cosmetics, but monoesters of fatty acids with 6 to 12 carbon atoms and glycerin are preferred. Specific examples include glycerin monocaprylate, glycerin monocaprate, and glycerin monolaurate, with glycerin monocaprylate being the most preferred.

[0023] The content of component (C) (or the total amount if multiple types of component (C) are included) should be 0.01% by mass or more and 2% by mass or less, preferably 0.05 to 1.5% by mass, and more preferably 0.1 to 1% by mass, relative to the total amount of the detergent composition. If the content of component (C) is 0.01% by mass or more, stiffness in the hair after rinsing is less likely to occur. On the other hand, if the amount of component (C) is excessive, a slippery feeling may occur during rinsing, or conversely, stiffness may occur, but if it is 2% by mass or less, slipperiness is less likely to occur, and stiffness can be further suppressed.

[0024] [(D) Copolymer] The copolymer (D) used in the present invention is a copolymer containing predetermined amounts of each of the constituent units represented by the following formulas (1) to (3).

[0025] The constituent unit represented by equation (1) is a structure derived from the monomer represented by the following equation (1'). [ka] In equations (1) and (1'), R 1 R represents a hydrogen atom or a methyl group. 1 The group is preferably a methyl group. A preferred example of the monomer represented by the above formula (1') is 2-methacryloyloxyethyl phosphorylcholine. (D) The amount of constituent unit (1) relative to the total constituent units of the copolymer is 2 mol% or more and 30 mol% or less, preferably 3 to 20 mol%, and more preferably 5 to 15 mol%.

[0026] The constituent unit represented by equation (2) is a structure derived from the monomer represented by the following equation (2'). [ka] In equations (2) and (2'), R 2represents a hydrogen atom or a methyl group, preferably a methyl group. In formula (2) and formula (2’), X represents a hydrogen atom or an alkali metal atom, preferably an alkali metal atom. Examples of the alkali metal atom include sodium, potassium, etc., preferably sodium. Preferable examples of the monomer represented by formula (2’) include methacrylic acid and its salts. (D) The amount of the structural unit (2) relative to all the structural units of the copolymer may be 50 mol% or more and 95 mol% or less, preferably 60 to 90 mol%, more preferably 70 to 85 mol%.

[0027] The structural unit represented by formula (3) is a structure derived from a monomer represented by the following formula (3’). [Chemical formula] In formula (3) and formula (3’), R 3 represents a hydrogen atom or a methyl group, preferably a methyl group. In formula (3) and formula (3’), R 4 represents an alkyl group having 1 to 22 carbon atoms, preferably having 4 to 18 carbon atoms. The alkyl group may be linear or branched. Preferable examples of the monomer represented by formula (3’) include butyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, and among them, butyl (meth)acrylate is most preferable. In the present invention, “(meth)acrylate” means acrylate, methacrylate, and both of them. (D) The content of the structural unit (3) relative to all the structural units of the copolymer may be 1 mol% or more and 20 mol% or less, preferably 2 to 15 mol%, more preferably 3 to 10 mol%.

[0028] The (D) copolymer can be obtained by radical polymerization of a composition containing monomers represented by formulas (1') to (3') in predetermined ratios. In addition to the constituent units represented by formulas (1) to (3) above, the (D) copolymer may contain other constituent units as needed. However, the amount of other constituent units is preferably 20 mol% or less, and more preferably 10 mol% or less, relative to the total constituent units of the (D) copolymer.

[0029] The weight-average molecular weight of the copolymer (D) is preferably in the range of 50,000 to 3,000,000, and more preferably in the range of 150,000 to 1,000,000. The weight-average molecular weight of the copolymer (D) is a value measured by gel permeation chromatography (GPC). When the weight-average molecular weight of the copolymer (D) is within this range, it becomes easier to impart a smooth coating to the hair after rinsing.

[0030] The detergent composition may contain only one type of (D) copolymer, or it may contain two or more types. The content of (D) copolymer (or the total amount if multiple types of (D) copolymer are included) should be 0.0005% by mass or more and 0.5% by mass or less, preferably 0.001 to 0.25% by mass, and more preferably 0.005 to 0.1% by mass, based on the total amount of the detergent composition. If the content of (D) copolymer is 0.0005% by mass or more, a smooth film-like feeling can be imparted to the hair after rinsing. On the other hand, if the amount of (D) copolymer is too high, a slimy feeling may occur during rinsing, or the hair may become stiff, but if it is 0.5% by mass or less, sliminess and stiffness are less likely to occur.

[0031] Furthermore, the mass ratio (D) / (C) of polymer (D) to component (C) described above is preferably 0.001 to 1, more preferably 0.01 to 0.5, and particularly preferably 0.03 to 0.2. When the ratio of polymer (D) to component (C) is within this range, a smooth film feeling is easily imparted after rinsing, and stickiness and stiffness are less likely to occur.

[0032] [Other ingredients] The detergent composition of the present invention may further contain components other than those mentioned above (other components). Examples of other components include water, optional components described later, etc.

[0033] Detergent compositions typically contain water. The water used can be deionized water, ion-exchanged water, or distilled water. The water content is preferably 50-95% by mass, and more preferably 65-90% by mass, relative to the total volume of the detergent composition.

[0034] Optional ingredients include, for example, oils and fats such as vegetable oils and animal oils; hydrocarbon oils such as squalane, liquid paraffin, and hydrogenated polyisobutene; higher alcohols such as cetyl alcohol, stearyl alcohol, and cetostearyl alcohol; silicones such as cyclic silicones, dimethylpolysiloxane, and amino-modified polysiloxane; ester oils such as 2-ethylhexyl palmitate, caprylic / capric triglyceride, and isopropyl myristate; cationic surfactants such as alkyltrimethylammonium chloride, dialkyldimethylammonium chloride, benzalkonium chloride, and cocoyl arginine ethyl PCA; nonionic surfactants such as polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, fatty acid alkanolamides, fatty acid alkylene glycol esters, and amine oxides; cationized cellulose and cationized guar gum, dialkyldiallylammonium chloride and acrylic Cationic polymers such as copolymers with amides; pearlescent gloss-granting agents such as ethylene glycol distearate and triethylene glycol distearate; water-soluble polymers other than (D) polymers such as hydroxyethylcellulose, polyethylene glycol, polyvinyl alcohol, and carboxyvinyl polymer; humectants such as 1,3-butylene glycol, propylene glycol, dipropylene glycol, pentylene glycol, glycerin, diglycerin, isoprene glycol, and protein hydrolysate; solvents such as ethanol; pH adjusters such as sodium hydroxide, potassium hydroxide, monoethanolamine, triethanolamine, hydrochloric acid, sulfuric acid, citric acid, succinic acid, malic acid, lactic acid, and tartaric acid; antioxidants such as tocopherol and sulfites; preservatives such as benzoic acid and its salts, phenoxyethanol, and parabens; polysaccharides, plant and animal extracts, amino acids, peptides, fragrances, colorants, and hydrolyzed hydrogenated starch are examples of substances that can be included as appropriate.

[0035] Among these optional ingredients, including extracts derived from plants and animals makes it easier to impart a smooth coating to the hair after rinsing and further suppresses hair stiffness. In particular, among the extracts derived from plants and animals, it is preferable to include a fermentation liquid made from yeast using plants or processed products of plants as raw materials.

[0036] The raw materials for the fermentation liquid are not particularly limited, but for example, rice bran, Job's tears seeds, soy milk, damask rose flowers, and gum arabic are preferably used. Rice bran is the powdered material produced during normal rice milling, and it is sufficient that it contains at least the bran layer, and it may also contain the germ. Soy milk is made by soaking soybeans in water, grinding them, adding water, boiling down the liquid, and filtering it. Gum arabic is a dried secretion obtained from the bark of the gum arabic tree.

[0037] The method for preparing the fermentation liquid is not particularly limited, but it may include, for example, a mixing step of mixing plants or their processed products with water, a fermentation step of adding bacteria to the mixture and performing a fermentation treatment, and an autodigestion step of allowing the bacteria to autodigest. In the mixing step, it is preferable to adjust the mass ratio of plants or their processed products to water (plants or their processed products / water) to 1 / 10 to 1 / 1,000, and more preferably to 1 / 100 to 1 / 500. The mixing step may be carried out at room temperature (1 to 30°C), but it is preferable to carry it out under heating of about 60 to 100°C in order to sufficiently extract the components of the plants or their processed products into the water. As water, purified water such as ion-exchanged water or distilled water, or other water suitable for the manufacture of cosmetics, is used.

[0038] The yeast used in the fermentation process is not particularly limited, but for example, Saccharomyces cerevisiae can be used. Saccharomyces cerevisiae is a yeast commonly used in the production of sake, beer, and bread, and alcohol is produced during the fermentation process. Fermentation can be carried out using a starter culture obtained by adding Saccharomyces cerevisiae to a mixture of plants or their processed products and water and allowing it to ferment. The fermentation process is preferably carried out under aerobic conditions at 20-40°C for about 30 minutes to 5 hours.

[0039] The autolysis process is not particularly limited, but it is preferable to stir the mixture at 40-60°C under aerobic conditions for about 5-24 hours.

[0040] Furthermore, the fermented liquid used may be one prepared according to a known manufacturing method other than those described above, or a commercially available fermented liquid for use in cosmetics, quasi-drugs, etc. One type of fermented liquid may be used alone, or two or more types may be used in combination. The content of the fermented liquid is preferably 0.001 to 10% by mass, and more preferably 0.01 to 1% by mass, based on the total amount of the detergent composition.

[0041] [Method for preparing a detergent composition] The detergent composition of the present invention can be manufactured according to conventional methods. The form of the detergent composition of the present invention can be appropriately selected from liquid, gel, etc., but a liquid form is preferred. Furthermore, the form of use is not limited, and it can be used, for example, as a hair shampoo, rinse-in shampoo, facial cleanser, makeup remover, body soap, or hand soap. [Examples]

[0042] The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited in any way by these examples.

[0043] [Preparing the materials] The following ingredients were prepared.

[0044] (A) Anionic surfactants • Sodium Cocoyl Methyl Taurate • Sodium lauroyl methylalanine

[0045] (B) Amphoteric surfactants Cocamidopropyl betaine • Stearyl betaine

[0046] (C) Glycerin monoalkyl ether, glycerin monofatty acid ester Glyceryl caprylate (also known as glycerin monocaprylate) • Ethylhexylglycerin (also known as glycerin mono-2-ethylhexyl ether)

[0047] (C') Component for comparison Glycol distearate

[0048] (D) Copolymer Polyquaternium-65 (a copolymer containing 10 mol% of 2-methacryloyloxyethyl phosphorylcholine as component (1), 80 mol% of sodium methacrylate as component (2), and 10 mol% of butyl (meth)acrylate as component (3))

[0049] (D') Component for comparison Xanthan gum

[0050] (Other ingredients) Rice bran fermentation liquid 1,3-Propanediol Hydrolyzed hydrogenated starch (Aqua All #2, manufactured by Bussan Food Science Co., Ltd.) pH adjuster

[0051] [Examples 1-8, Comparative Examples 1-7] The detergent compositions of Examples 1-8 and Comparative Examples 1-7 were prepared by blending each component in the parts by mass shown in Tables 1 and 2. The units of the values ​​in Tables 1 and 2 are in mass percent. (D) / (C) indicates the mass ratio of component (D) to component (C).

[0052] 〔evaluation〕 The detergent compositions prepared in the examples and comparative examples were evaluated according to the following criteria for each of the items (1) to (4) below. For each item, "◎" was judged as a particularly excellent detergent composition, and "○" was judged as an excellent detergent composition. The results are shown in Tables 1 and 2. The total score is also shown in Tables 1 and 2. ◎: Total score of 30 points or more ○: Total score is 20 points or more, but less than 30 points. △: Total score is 10 points or more, but less than 20 points. ×: Total score is less than 10 points

[0053] (1) Good lathering Twenty men and women (ages 24-40) served as panelists. After thoroughly wetting their hair with water, approximately 4g of the cleansing agent composition was applied, and they washed their scalp for one minute while massaging it with their fingers. They then evaluated the lathering ability as follows, and the total scores from all 20 participants were calculated for evaluation. 2 points: I felt it lathered well. 1 point: I felt it lathered up quite well. 0 points: I felt it didn't lather well.

[0054] (2) No sliminess during rinsing After the evaluation in (1), the degree of slipperiness after rinsing with 40°C water for 1 minute using a shower with a flow rate of 100 mL / second was judged as follows, and the total score of 20 people was calculated and evaluated. 2 points: I felt it wasn't slimy. 1 point: I felt it was slightly slimy. 0 points: I felt it was slimy.

[0055] (3) Smooth coating on the hair after rinsing After the evaluation in (2), fingers were run through the wet hair or the surface of the hair was pinched between the fingers and traced. If the hair felt smooth and the entire hair was covered with a uniform coating, it was judged to have a smooth coating, and the total score of the 20 people was calculated and evaluated as follows. Points 2: I felt it had a smooth coating. 1 point: I felt it had a slightly smooth coating. 0 points: I felt it lacked a smooth, protective coating.

[0056] (4) No stiffness in the hair after rinsing After the evaluation in (2), the wet hair was gently squeezed in the palm of the hand and judged as not having stiffness if there was no snagging, stiffness, or spreading. The total score of the 20 people was then calculated and evaluated. 2 points: I felt it wasn't stiff. 1 point: I felt it was slightly stiff. 0 points: I felt it was stiff.

[0057] [Table 1]

[0058] [Table 2]

[0059] As shown in Table 1 above, in Examples 1 to 8, which contain (A) anionic surfactant, (B) amphoteric surfactant, (C) glycerin monoalkyl ether and / or glycerin monofatty acid ester, and (D) copolymer of a specific structure in predetermined composition ratios, good lathering was observed in all cases, and the hair did not feel sticky during rinsing. Furthermore, a smooth film-like feeling was obtained after rinsing, and the hair did not feel stiff.

[0060] On the other hand, as shown in Table 2, when component (C) was not included, stiffness tended to occur after rinsing (Comparative Examples 1 and 3). Also, when component (D) was not included, it was difficult to obtain a smooth coating after rinsing (Comparative Examples 1 and 2).

[0061] Furthermore, as shown in Table 2, when there was too much of component (C), stiffness occurred, and a slippery feeling was more likely to occur during rinsing (Comparative Example 4). Similarly, when there was too much of component (d), stiffness occurred, and a slippery feeling was more likely to occur on the hair during rinsing (Comparative Example 5).

[0062] Furthermore, as shown in Table 2, when glycol distearate (C') was used instead of glycerin monoalkyl ether and / or glycerin monofatty acid ester, the hair tended to feel slippery during rinsing and stiff after rinsing (Comparative Example 6). Also, as shown in Table 2, when xanthan gum was used instead of copolymers having a specific structure, it was difficult to obtain a smooth coating after rinsing (Comparative Example 7). [Industrial applicability]

[0063] The cleansing composition of the present invention exhibits excellent foaming during washing and a lack of stickiness during rinsing. Furthermore, it provides a uniformly smooth coating to the hair after rinsing, and is less likely to cause stiffness in the hair. Therefore, it provides a superior feel to wet hair before the use of treatment, and is extremely useful as, for example, a cleansing composition for hair.

Claims

[Claim 1] (A) Anionic surfactant in an amount of 1% by mass or more and 20% by mass or less, (B) Amphoteric surfactant in an amount of 1% by mass or more and 20% by mass or less, (C) Glycerin monoalkyl ether and / or glycerin monofatty acid ester in an amount of 0.01% by mass or more and 2% by mass or less, (D) A copolymer containing 2 mol% to 30 mol% of the constituent unit represented by the following formula (1), 50 mol% to 95 mol% of the constituent unit represented by the following formula (2), and 1 mol% to 20 mol% of the constituent unit represented by the following formula (3), in a quantity of 0.0005% to 0.5% by mass, A detergent composition containing the following: 【Chemistry 1】 (In formula (1), R １ (This indicates a hydrogen atom or a methyl group.) 【Chemistry 2】 (In formula (2), R ２ This indicates a hydrogen atom or a methyl group. (X represents a hydrogen atom or an alkali metal atom.) 【Transformation 3】 (In formula (3), R ３ This indicates a hydrogen atom or a methyl group. R ４ (This indicates an alkyl group with 1 to 22 carbon atoms.)

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