Hair cleansing composition

Abstract

To provide a hair detergent composition having good foamability and excellent feeling of use such as smoothness in shampooing.SOLUTION: A hair cleansing composition contains the following components (A) to (C): (A) a sulfuric acid-based anionic surfactant, (B) glyceryl monofatty acid, and (C) a specific cationic polymer.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a hair wash composition. [Background technology]

[0002] In addition to the basic function of removing dirt from hair, hair cleanser compositions are required to have good foaming properties during hair washing and to be easy to comb. In response to this, for example, Patent Document 1 discloses that a hair cleanser composition containing an anionic surfactant, a specific cationic group-containing copolymer, and a specific hydrophobic cationized hydroxyethyl cellulose is excellent in foaming during washing, ease of hair unraveling during rinsing, lack of tangles, lack of squeaky feeling, and rich feeling, and furthermore, dramatically improves the hair drying speed. Furthermore, Patent Document 2 aims to provide a conditioning cleanser with improved feel characteristics such as flexibility and soft feel, and discloses a combination of alkyl glucoside, a fatty acid ester of glycerol, and an oil, and also discloses the use of a sulfate-based anionic surfactant as a surfactant in an example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-88516 [Patent Document 2] Special Publication No. 2014-509610 Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, it is known that adding a cationic polymer to a surfactant improves properties such as ease of hair unraveling during rinsing, freedom from tangles and squeaky feeling, and improves the feel of hair after use. On the other hand, from the viewpoint of improving satisfaction with the cleansing feel and feel after use, there is also a demand for hair wash compositions that have excellent foaming properties and provide good smoothness during hair washing.

[0005] Therefore, an object of the present invention is to provide a hair wash composition that has good foaming properties and also provides excellent smoothness during hair washing. [Means for solving the problem]

[0006] The present inventors have found that the above-mentioned problems can be solved by providing a hair wash composition containing a sulfate-based anionic surfactant, a mono-fatty acid glyceryl, and a specific cationic polymer. That is, the present invention provides the following components (A) to (C): (A) a sulfate-based anionic surfactant, (B) monoglycerides of fatty acids, and (C) a cationic polymer which is at least one selected from the group consisting of the following components (C1) and (C2): The present invention relates to a hair cleansing composition comprising: (C1) A cationic group-containing copolymer which is a copolymer of a monomer mixture containing the following monomers (c1-1), (c1-2), and (c1-3): Monomer (c1-1) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (1): [ka] (In the formula, R 1 represents a hydrogen atom or a methyl group, and R 2 represents a hydrogen atom, a linear or branched alkyl group or an alkenyl group having 1 to 4 carbon atoms, and R 3 represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms. Monomer (c1-2) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (2): [ka] (In the formula, R 1 represents the same group as above, and R 4 and R 5 each independently represents an alkyl or alkenyl group having 1 to 4 carbon atoms, and R 6 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and Y 1 represents an -O-, -NH-, -CH2- or -O-CH2CH(OH)- group, and Y 1 When is -CH2-, Z 1 represents a single bond or a linear or branched divalent saturated hydrocarbon group having 1 to 3 carbon atoms; Y 1 When is other than -CH2-, Z 1 represents a linear or branched divalent saturated hydrocarbon group having 1 to 4 carbon atoms. Q represents a conjugate base of an acid. Monomer (c1-3) Crosslinkable monomer having two or more reactive unsaturated groups (C2) A hydrophobic cationized hydroxyethyl cellulose having a main chain derived from anhydroglucose represented by the following general formula (3), in which the average number of moles of cationized ethyleneoxy groups per anhydroglucose unit is 0.01 or more and 3.0 or less, and the average number of moles of ethyleneoxy groups is 0.5 or more and 4.0 or less: [ka] (In general formula (3), R 7 , R 8 and R 9 are each independently represented by the following general formula (4): [ka] and a substituent having an ethyleneoxy group, and n is the average degree of polymerization of anhydroglucose and is a number of 50 or more and 5,000 or less. In general formula (4), Y2 and Y 3 is a hydrogen atom on one side and a group represented by the following general formula (5) [ka] p represents the number of ethyleneoxy groups contained in the general formula (4), and q represents the number of cationized ethyleneoxy groups (-CH(Y 2 )-CH(Y 3 )-O-), each of which is 0 or a positive integer. When neither p nor q is 0, the order of addition of the cationized ethyleneoxy group and the ethyleneoxy group does not matter, and when p and / or q is 2 or greater, either block bonding or random bonding may be used. When a plurality of substituents represented by general formula (4) are present in a molecule, the values ​​of p and q may be different among the substituents, but at least one of them has a q of 1 or greater. In general formula (5), R 10 ~R 12 each independently represents a linear or branched alkyl group having 1 to 18 carbon atoms; X - indicates an anionic group. However, R 12 At least one of the groups is a linear or branched alkyl group having 8 to 18 carbon atoms. [Effects of the Invention]

[0007] The hair wash composition of the present invention can provide a hair wash composition that has good foaming properties and also provides excellent smoothness during hair washing. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Hair cleansing composition] The hair wash composition of the present invention comprises the following components (A) to (C): (A) a sulfate-based anionic surfactant, (B) monoglycerides of fatty acids, and (C) a cationic polymer which is at least one selected from the group consisting of the components (C1) and (C2); The hair cleansing composition comprises: The hair wash composition of the present invention, having the above-mentioned constitution, is a hair wash composition that has good foaming properties and is also excellent in terms of feel during use, such as smoothness during hair washing.

[0009] <Definition> In the present invention, "hair" primarily refers to human head hair, but also includes hair that has been cut off from the human head. In the present invention, "comprises component X" or "contains component X" also means "composed of component X."

[0010] The reason why the hair wash composition of the present invention having the above-described structure exhibits the effects of the present invention is not clear, but is presumed to be as follows. The hair wash composition of the present invention contains a sulfate-based anionic surfactant as component (A), a monoglyceryl fatty acid as component (B), and a specific cationic polymer as component (C). The sulfate-based anionic surfactant of component (A) is a water-soluble surfactant that is extremely commonly used in hair wash compositions. Adding component (B), which functions as a hydrophobic nonionic surfactant, to this surfactant is expected to provide excellent foaming properties and increase foam volume. Furthermore, the addition of a cationic polymer is expected to increase foam viscosity and contribute to foam stabilization. The selection of a specific cationic polymer as component (C) is believed to further enhance the smoothness of the foam, improving the smoothness of hair when running fingers through it during shampooing.

[0011] <Sulfate-based anionic surfactant (A)> The hair wash composition of the present invention contains a sulfate anionic surfactant (A) from the viewpoint of improving foaming properties. The sulfate anionic surfactant is an anionic surfactant having a sulfate ester structure containing an alkyl group or an alkenyl group, and any known anionic surfactant can be used without particular limitation. The inclusion of a sulfate anionic surfactant generally improves both foaming properties and cleansing properties, and also reduces production costs.

[0012] Examples of the sulfate-based anionic surfactant include polyoxyethylene alkyl ether sulfates and alkyl sulfates. These may be used alone or in combination of two or more. The hydrocarbon group such as an alkyl group contained in the sulfate-based anionic surfactant preferably has 8 to 22 carbon atoms, more preferably 8 to 18 carbon atoms, and even more preferably 10 to 18 carbon atoms. Counter ions of the anionic group of the anionic surfactant include alkali metal ions, ammonium ions, alkanolammonium, basic amino acids, etc. Here, examples of alkali metal ions include sodium ions and potassium ions, examples of alkanolammonium include alkanolammoniums having 1 to 3 alkanol groups with 2 or 3 carbon atoms (e.g., monoethanolammonium, diethanolammonium, triethanolammonium, triisopropanolammonium), etc., and examples of basic amino acids include lysine, hydroxylysine, histidine, arginine, etc.

[0013] Examples of polyoxyethylene alkyl ether sulfate ester salts include sulfate-based anionic surfactants represented by the following general formula (1), and examples of alkyl sulfate ester salts include sulfate-based anionic surfactants represented by the following general formula (2). R 1 (OCH2CH2) m -OSO3M (1) R 2 OSO3M (2) (In the formula, R 1 represents an alkyl group having 10 to 18 carbon atoms, and R 2 represents an alkyl group having 10 to 18 carbon atoms, M represents an alkali metal, ammonium, alkanolammonium or basic amino acid cation, and m represents the average number of moles added, which is a number of 1 to 5. From the viewpoint of improving foaming properties and cleansing properties, the sulfate-based anionic surfactant represented by general formula (1) is preferably laureth sulfate, and the sulfate-based anionic surfactant represented by general formula (2) is preferably lauryl sulfate. Laureth sulfate is more preferred as the sulfate-based anionic surfactant. Specific examples of laureth sulfate include sodium laureth sulfate and ammonium laureth sulfate, and specific examples of lauryl sulfate include sodium lauryl sulfate and ammonium lauryl sulfate.

[0014] From the viewpoint of improving lathering properties and cleansing performance, the content of this component (A) in the hair wash composition is preferably 1.0% by mass or more, more preferably 5.0% by mass or more, and even more preferably 8.0% by mass or more, and from the same viewpoint, it is preferably 20% by mass or less, more preferably 17.5% by mass or less, and even more preferably 15% by mass or less. Also, from the viewpoint of improving lathering properties and cleansing performance, it is preferably 1.0% by mass or more and 20% by mass or less, more preferably 5.0% by mass or more and 17.5% by mass or less, and even more preferably 8.0% by mass or more and 15% by mass or less.

[0015] <Monoglyceryl fatty acids (B)> The hair wash composition of the present invention contains a mono-fatty acid glyceryl as component (B) from the viewpoint of improving foaming properties and smoothness during hair washing. The mono-fatty acid glyceryl is a mono-fatty acid ester of glycerin. The hydrocarbon chain of component (B) may be a linear hydrocarbon chain or a branched hydrocarbon chain, and is preferably a linear hydrocarbon chain from the viewpoint of improving foaming properties and smoothness during hair washing. Furthermore, this hydrocarbon chain may be a saturated hydrocarbon chain or an unsaturated hydrocarbon chain, and is preferably a saturated hydrocarbon chain from the viewpoint of improving foaming properties and smoothness during hair washing. These may be used alone or in combination of two or more.

[0016] The number of carbon atoms in the acyl group of component (B) is preferably 8 or more from the viewpoints of improving lathering properties and smoothness during shampooing, and from the viewpoints of irritation and odor, and from the viewpoints of improving lathering properties, smoothness during rinsing, and formulation viscosity, it is preferably 22 or less, more preferably 18 or less, even more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, still more preferably 10 or less, and still more preferably 8 or less. Also, from the same viewpoints, it is preferably 8 or more and 22 or less, more preferably 8 or more and 18 or less, even more preferably 8 or more and 16 or less, still more preferably 8 or more and 14 or less, still more preferably 8 or more and 12 or less, still more preferably 8 or more and 10 or less, and still more preferably 8. Specific examples of mono-fatty acid glyceryl as component (B) include glyceryl caprylate, glyceryl caprate, glyceryl laurate, glyceryl myristate, glyceryl palmitate, glyceryl oleate, glyceryl stearate, and glyceryl behenate. From the viewpoint of improving lathering properties and smoothness during shampooing, one or more selected from the group consisting of glyceryl caprylate and glyceryl caprate is preferred, and glyceryl caprylate is more preferred.

[0017] The content of component (B) in the hair wash composition is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and even more preferably 2.0% by mass or more from the viewpoints of improving lathering properties and smoothness during hair washing, and is preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 7.0% by mass or less, and still more preferably 5.0% by mass or less from the viewpoints of formulation flexibility and economic efficiency. Furthermore, the content of component (B) in the hair wash composition is preferably 0.5% by mass or more and 15% by mass or less, more preferably 1.0% by mass or more and 10% by mass or less, even more preferably 2.0% by mass or more and 7.0% by mass or less, and still more preferably 2.0% by mass or more and 5.0% by mass or less, from the same viewpoints as above.

[0018] <Cationic polymer (C)> The hair wash composition of the present invention contains a specific cationic polymer (C) from the viewpoint of improving smoothness and lathering properties during hair washing. The specific cationic polymer in component (C) is one or more selected from the group consisting of the following components (C1) and (C2). Note that component (C) does not include cationic polymers other than components (C1) and (C2). In this specification, the term "cationic polymer" refers to a water-soluble polymer having cationic groups and an overall cationic charge, and the cationic group refers to a cationic group or a group that can be ionized to become a cationic group. Specific examples of this cationic group include a primary amino group, a secondary amino group, a tertiary amino group, and a quaternary ammonium group.

[0019] <<Component (C1)>> The cationic polymer of component (C1) is a cationic group-containing copolymer which is a copolymer of a monomer mixture containing the following monomers (c1-1), (c1-2) and (c1-3).

[0020] [Monomer (c1-1)] The monomer (c1-1) is at least one selected from vinyl monomers represented by the following general formula (1).

[0021] [ka] (In the formula, R 1 represents a hydrogen atom or a methyl group, and R 2 represents a hydrogen atom, a linear or branched alkyl group or an alkenyl group having 1 to 4 carbon atoms, and R 3 represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms. From the viewpoint of solubility in the composition and smoothness and lathering properties during hair washing, it is preferable to use a compound having R 1 is preferably a hydrogen atom, and R 2is preferably a linear or branched alkyl group having 1 to 4 carbon atoms, more preferably a linear alkyl group having 1 to 2 carbon atoms, R 3 is preferably a linear or branched alkyl group having from 1 to 4 carbon atoms, more preferably a linear alkyl group having from 1 to 2 carbon atoms. Furthermore, this monomer (c1-1) is preferably N,N-dimethylacrylamide or the like.

[0022] [Monomer (c1-2)] The monomer (c1-2) is at least one selected from vinyl monomers represented by the following general formula (2).

[0023] [ka] (In the formula, R 1 represents the same group as above, and R 4 and R 5 each independently represents an alkyl or alkenyl group having 1 to 4 carbon atoms, and R 6 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and Y 1 represents an -O-, -NH-, -CH2- or -O-CH2CH(OH)- group, and Y 1 When is -CH2-, Z 1 represents a single bond or a linear or branched divalent saturated hydrocarbon group having 1 to 3 carbon atoms; Y 1 When is other than -CH2-, Z 1 represents a linear or branched divalent saturated hydrocarbon group having 1 to 4 carbon atoms. Q represents a conjugate base of an acid.

[0024] [Monomer (c1-3)] Monomer (c1-3) is a crosslinkable monomer having two or more reactive unsaturated groups. The reactive unsaturated groups are unsaturated groups reactive with monomers (c1-1) and (c1-2), such as ethylenically unsaturated groups. From the viewpoint of improving smoothness and lathering properties during shampooing, preferred examples of monomer (c1-3) include (meth)acrylic acid ester compounds of polyhydric alcohols such as ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, and polyethylene glycol di(meth)acrylate, and more preferred is polyethylene glycol di(meth)acrylate.

[0025] The cationic polymer of component (C1) is preferably N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (INCI name: Polyquaternium-52). Commercially available products of Polyquaternium-52 include, for example, SOFCARE KG-301W and SOFCARE KG-101W-E (both manufactured by Kao Corporation).

[0026] <<Component (C2)>> The cationic polymer of component (C2) is a hydrophobic cationized hydroxyethyl cellulose having a main chain derived from anhydroglucose represented by the following general formula (3), in which the average number of moles of cationized ethyleneoxy groups per anhydroglucose unit is 0.01 or more and 3.0 or less, and the average number of moles of ethyleneoxy groups is 0.5 or more and 4.0 or less. [ka] (In the formula, R 7 , R 8 and R 9 each independently represent a cationized ethyleneoxy group represented by the following general formula (4) and a substituent having an ethyleneoxy group, and n is the average degree of polymerization of anhydroglucose and represents a number of 50 or more and 5000 or less.

[0027] R in general formula (3)7 , R 8 and R 9 are substituents represented by general formula (4), and may be the same or different. 7 , n R 8 , n R 9 may be the same or different.

[0028] [ka] (In the formula, Y 2 and Y 3 One of the groups is a hydrogen atom, and the other is a cationic group represented by the following general formula (5): p is the number of ethyleneoxy groups contained in the general formula (4), q is the number of cationized ethyleneoxy groups (-CH(Y 2 )-CH(Y 3 )-O-), each of which is 0 or a positive integer. When neither p nor q is 0, the order of addition of the cationized ethyleneoxy group and the ethyleneoxy group does not matter, and when p and / or q is 2 or greater, either block bonding or random bonding may be used. When a plurality of substituents represented by general formula (4) are present in a molecule, the values ​​of p and q may be different among the substituents, but at least one of them has a q of 1 or greater.

[0029] [ka] (In the formula, R 10 ~R 12 each independently represents a linear or branched alkyl group having 1 to 18 carbon atoms; X - indicates an anionic group. However, R 12 At least one of the groups is a linear or branched alkyl group having 8 to 18 carbon atoms.

[0030] In general formula (5), R 10 ~R 12Examples of R include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-octyl group, an n-decyl group, an n-dodecyl group, an n-tetradecyl group, an n-hexadecyl group, and an n-octadecyl group. 10 and R 11 From the viewpoint of improving smoothness and lathering properties during hair washing, R is preferably one or more groups selected from the group consisting of a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-octyl group, an n-decyl group, and an n-dodecyl group, and more preferably a methyl group. 12 is preferably one or more selected from the group consisting of a methyl group, an n-octyl group, an n-decyl group, and an n-dodecyl group, and more preferably one or more selected from the group consisting of a methyl group and an n-dodecyl group.

[0031] In general formula (5), X - is an anionic group that serves as a counterion of ammonium, and specific examples thereof include alkyl sulfate ions, sulfate ions, phosphate ions, alkyl carbonate ions, and halide ions. Of these, halide ions are preferred from the viewpoint of ease of production. Examples of halide ions include fluoride ions, chloride ions, bromide ions, and iodide ions, but from the viewpoint of water solubility and chemical stability of component (C2), chloride ions and bromide ions are preferred, and chloride ions are more preferred.

[0032] The cationic polymer of component (C2) is preferably a quaternary ammonium salt polymer (INCI name: Polyquaternium-67) obtained by addition reaction of hydroxyethyl cellulose with trimethylammonium-substituted epoxide and lauryldimethylammonium-substituted epoxide. Commercially available products of Polyquaternium-67 include SoftCat Polymer SL-30 (manufactured by The Dow Chemical Company).

[0033] The content of this component (C) in the hair wash composition is preferably 0.03% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, from the viewpoints of improving smoothness and lathering properties during hair washing and of achieving appropriate viscosity properties, and is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, and even more preferably 1.0% by mass or less, from the viewpoints of formulation viscosity and ease of production. Furthermore, from the same viewpoints, the content of component (C) is preferably 0.03% by mass or more and 3.0% by mass or less, more preferably 0.05% by mass or more and 2.0% by mass or less, and even more preferably 0.1% by mass or more and 1.0% by mass or less.

[0034] The components (C1) and (C2) may each be used alone or in combination of two or more. The hair wash composition of the present invention may contain a cationic polymer (C') other than component (C), as long as it does not affect the foaming and smoothness of hair during washing. The content of component (C') in the hair wash composition of the present invention is preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less.

[0035] The above-mentioned components (A) to (C) are essential components in the hair wash composition of the present invention. From the viewpoint of improving lathering properties and smoothness during hair washing, the total amount of these components (A) to (C) in the hair wash composition is preferably 3.0% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and preferably 32% by mass or less, more preferably 25% by mass or less, even more preferably 20% by mass or less. From the same viewpoint, the total amount of components (A) to (C) is preferably 3.0% by mass or more and 32% by mass or less, more preferably 10% by mass or more and 25% by mass or less, even more preferably 15% by mass or more and 20% by mass or less.

[0036] <Component (D): Surfactant other than components (A) and (B)> The hair wash composition of the present invention may further contain a surfactant other than components (A) and (B) as component (D) for the purpose of enhancing the favorable properties of foaming and smoothness during hair washing. Component (D) is an optional component. Examples of the component (D) used in the present invention include anionic surfactants other than the component (A), nonionic surfactants other than the component (B), amphoteric surfactants, and cationic surfactants. One type of component (D) can be used alone, or two or more types can be used in combination. From the same viewpoint as above, it is preferable that component (D) contains one or more surfactants selected from the group consisting of nonionic surfactants and amphoteric surfactants other than component (B). Examples of nonionic surfactants other than component (B) include alkyl polyglycosides, polyoxyalkylene alkyl ethers, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid glyceryls, sorbitan fatty acid esters, polyoxyalkylene sorbitol fatty acid esters, (poly)ethylene glycol fatty acid esters, polyoxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, monoalkyl glyceryl ethers, monoalkenyl glyceryl ethers, fatty acid monoalkanolamides, and higher alcohols, with polyoxyethylene fatty acid glyceryls and fatty acid monoalkanolamides being preferred. Specific examples of polyoxyethylene fatty acid glyceryls include coconut oil fatty acid PEG-7 glyceryl, and specific examples of fatty acid monoalkanolamides include cocamide MEA. Examples of amphoteric surfactants include betaine surfactants and amine oxide surfactants, and are preferably betaine surfactants. Specific examples of betaine surfactants include lauryl hydroxysultaine and lauramidopropyl betaine. When component (D) is contained, its content in the hair wash composition is preferably 1.0% by mass or more, more preferably 3.0% by mass or more, more preferably 5.0% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less. From the same viewpoints as above, the content of component (D) is preferably 1.0% by mass or more and 15% by mass or less, more preferably 3.0% by mass or more and 15% by mass or less, and even more preferably 5.0% by mass or more and 10% by mass or less.

[0037] <Aqueous medium> The hair wash composition of the present invention contains an aqueous medium. The aqueous medium is preferably composed mainly of water, and may further contain an aqueous medium other than water. Examples of the aqueous medium other than water include lower alcohols such as ethanol and isopropyl alcohol, and low-molecular-weight diols and triols having 6 or less carbon atoms, such as 1,3-butylene glycol, glycerin, ethylene glycol, propylene glycol, diethylene glycol, and dipropylene glycol. The water content in the aqueous medium is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and is preferably 100% by mass or less.

[0038] The content of the aqueous medium in the hair wash composition is preferably 50% by mass or more, more preferably 55% by mass or more, even more preferably 60% by mass or more, and still more preferably 65% ​​by mass or more, from the viewpoint of appropriate viscosity properties of the hair wash composition and good solubility of other components, and is preferably 90% by mass or less, more preferably 85% by mass or less, and even more preferably 80% by mass or less, from the viewpoint of freedom in formulation. Furthermore, from these viewpoints, the content of the aqueous medium is preferably 50% by mass or more and 90% by mass or less, more preferably 55% by mass or more and 85% by mass or less, even more preferably 60% by mass or more and 80% by mass or less, and still more preferably 65% ​​by mass or more and 80% by mass or less.

[0039] The hair wash composition of the present invention may contain other components in addition to the above-mentioned components as appropriate, provided that the purpose of the present invention is not impaired. Examples of such components include antioxidants, polymers, antidandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, moisturizers, ceramides, fragrances, colorants, UV absorbers, pH adjusters, and other components typically incorporated into hair wash compositions.

[0040] The form of the hair wash composition of the present invention is not particularly limited, and it may be in any form such as liquid, foam, gel, paste, or cream, but is preferably in liquid, gel, or cream form.

[0041] The hair wash composition of the present invention has a viscosity and pH suitable for its form and method of use. The viscosity of the hair wash composition of the present invention is preferably 200 mPa s or more, more preferably 2000 mPa s or more, and even more preferably 4000 mPa s or more, from the viewpoints of lathering ability, smoothness during hair washing, and ease of use, and is preferably 70000 mPa s or less, more preferably 50000 mPa s or less, from the viewpoint of ease of handling as a hair wash composition. The viscosity of this hair wash composition is the viscosity at 30°C, and can be measured, for example, with a Brookfield viscometer, specifically by the method described in the examples.

[0042] From the viewpoints of safety and antiseptic properties, the pH of the hair wash composition of the present invention is preferably from 3.0 to 8.0, more preferably from 3.5 to 7.5, even more preferably from 3.7 to 7.0, and still more preferably from 3.8 to 6.5. The pH of this hair wash composition is the value at 25°C when diluted to 5% (20 times by mass) with ion-exchanged water, simulating the pH at the time of application to hair, and can be specifically measured by the method described in the Examples.

[0043] [Method for producing hair cleanser composition] The method for producing the hair wash composition of the present invention is not particularly limited. For example, the composition can be produced by blending components (A) to (C), and optionally component (D) and other components, using a known method, and mixing them using a known stirring device or the like. In this process, the components may be mixed simultaneously, or a mixture of water-soluble components and a mixture of oil-soluble components may be prepared separately, and the blended components may be uniformly dissolved and then mixed to form the hair wash composition. For example, the hair wash composition is preferably prepared by the following procedure. First, a mixture of water-soluble components and a mixture of oil-soluble components are prepared separately. Specifically, a mixture of components (A), (D), and other water-soluble components, and a mixture of component (B) and other oil-soluble components are separately prepared. Next, these mixtures are heated to form homogeneous mixed solutions, and then component (C) and other cationic polymers are added to the water-soluble component mixture and dispersed, followed by cooling. The oil-soluble components are gradually added to the water-soluble mixture while maintaining the heating temperature, and mixed. After mixing, the mixture is cooled to room temperature (25°C) to prepare the hair wash composition. By preparing the composition in this manner, a hair wash composition can be obtained that has good foaming properties and also provides excellent smoothness during hair washing. [Example]

[0044] The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to the scope of the examples. Measurements and evaluations in the examples were carried out by the following methods.

[0045] <Viscosity> Approximately 100 mL of the hair wash composition obtained in each example was filled into a 110 mL transparent glass container, sealed, and allowed to stand at 30°C for at least 1 hour. After this, the viscosity was measured using a Brookfield viscometer TVM (TV-10, manufactured by Toki Sangyo Co., Ltd.) (rotor No. 3, 12 rpm, 1 minute later). When the viscosity was too high to be measured using the above-mentioned device, the viscosity was measured using a Brookfield viscometer TVR with a helical stand (TVB-10, manufactured by Toki Sangyo Co., Ltd.) (rotor TC, 10 rpm, 1 minute later).

[0046] <ph> The pH of the hair wash composition obtained in each example was measured at 25°C using a pH meter (F-51, manufactured by Horiba, Ltd.) For measuring the pH of the hair wash composition, an aqueous dispersion obtained by diluting the hair wash composition with purified water to 5% was used.

[0047] <Foaming ability (foaming when washing hair)> A hair tress (prepared from chemically untreated hair of a Japanese woman) measuring approximately 20 g and 25 cm in length was wetted with tap water and then washed with hot water at 35 to 40°C using a plain shampoo of the following composition. 0.5 mL of each hair cleanser composition was applied to the washed hair tress. The tress was then lightly held between the palms of both hands and rubbed together, repeating this motion for 30 strokes to create a lather. The lather immediately after lathering was placed in a beaker, and the lather volume (mL) was calculated from the foam volume. This procedure was repeated three times, and the average lather volume is shown in Table 1. Comparative Example 1 was used as a reference, and a lather ratio was calculated relative to this ratio, which is also shown in Table 1 as the "lathering ratio." A lathering ratio of 1.25 or higher was considered good.

[0048] [Plain shampoo composition] *The amount of active ingredient is the amount of active ingredient (mass%). Polyoxyethylene (2.0) sodium lauryl ether sulfate (*C1): 47.2 Lauric acid diethanolamide (*C2): 2.5 Sodium benzoate: 1.1 Sodium chloride: 1.2 Ion-exchanged water: 86.6 Total:100.0 (*C1) 47.2% by mass of "Emeral 227" (active ingredient amount 27% by mass) manufactured by Kao Corporation (*C2) Aminone C-11S (Kao Corporation), active ingredient content 100% by mass

[0049] <Smoothness after washing> A hair tress (prepared from chemically untreated hair of a Japanese woman) measuring approximately 20 g and 25 cm in length was wetted with tap water and then washed with the plain shampoo of the above composition using hot water at 35 to 40°C. 0.5 mL of each example hair cleanser composition was applied to the washed hair tress. The tress was then lightly held between the palms of both hands and rubbed together, repeating this motion for 30 strokes to create a lather. The lathered hair tress was then placed in a combing force measuring device (Utsunomiya Seiki Co., Ltd., "KOT-0303"), and a comb (10 pins, 2 mm in diameter, spaced 4 mm apart in a straight line) was inserted through the top of the tress. The load (gf) applied when the comb was passed through the hair to the ends at a speed of 31.3 cm / s was measured. The load was detected at 250 points at equal intervals (1 mm intervals) on a 25 cm long hair bundle, and the maximum value was taken as the "combing force." This operation was repeated 20 times, and the average value was taken as the "smoothness during hair washing (combing force)." The smaller the "smoothness during hair washing (combing force)," the smoother the hair could be combed. The result of Comparative Example 1 was used as the standard (reference), and a standard ratio relative to this was calculated and shown in Tables 1 and 2 as the "standard smoothness ratio during hair washing." A standard smoothness ratio during hair washing of 0.75 or less was considered "good."

[0050] [Examples 1 to 11, Comparative Examples 1 to 5] (Preparation and Evaluation of Hair Cleansing Compositions) Component (A), sodium lauroylmethylalanine, cocamide MEA, sodium benzoate, and water listed in Tables 1 and 2 were heated to 80°C and dissolved with stirring to obtain a mixture of water-soluble components. Subsequently, component (C) and polyquaternium-10 were dispersed in water and then added to the mixture of water-soluble components and stirred. Furthermore, succinic acid, potassium hydroxide, and lauryl hydroxysultaine were added, stirred, and cooled to below 50°C. Separately from this solution, component (B) and coconut oil fatty acid PEG-7 glyceryl were mixed, heated to 60°C, and stirred to obtain a mixture of oil-soluble components. The mixture of oil-soluble components was added to the mixture of water-soluble components and stirred, and then lauramidopropyl betaine and fragrance were added and stirred at below 40°C to obtain a hair wash composition.

[0051] The resulting hair wash compositions of each example were evaluated for lathering ability and smoothness during hair washing using the methods described above. The results are shown in Tables 1 and 2. The blending amount (mass %) of each component shown in the table is the amount of active ingredient.

[0052] [Table 1]

[0053] [Table 2]

[0054] The ingredients listed in the table are as follows: *1: Emar 227-PH11 (Kao Corporation) *2: Emar 125A (Kao Corporation) *3: Sunsoft No. 760-C (Taiyo Kagaku Co., Ltd.) *4: Sunsoft o.707BS (manufactured by Taiyo Kagaku Co., Ltd.) *5: SOFCARE KG-101W (Kao Corporation) *6: Soft Cat Polymer SL-30 (manufactured by The Dow Chemical Company) *7: Alanon ALE (Kawaken Fine Chemicals Co., Ltd.) *8: Amizol CME (Kawaken Fine Chemicals Co., Ltd.) *9: Amphitheater 20HD (Kao Corporation) *10: Cetiol HE-JP (manufactured by BASF Japan Ltd.) *11: Amphithor 20AB (Kao Corporation) *12: Kachisero M-80 (Kao Corporation) *13: Sodium benzoate 35% (Aioi Chemisciences Co., Ltd.) *14: Succinic acid (manufactured by Nippon Shokubai Co., Ltd.) *15: Liquid caustic potash (48%) (Occidental Chemical Co., USA)

[0055] Tables 1 and 2 show that the hair wash compositions of the present invention (Examples 1 to 11) were excellent in both lathering ability and smoothness during hair washing. On the other hand, the comparative examples that did not contain at least some of the essential components (A) to (C) of the present invention were insufficient in at least either lathering ability or smoothness during hair washing. [Industrial Applicability]

[0056] According to the present invention, it is possible to provide a hair wash composition that has good foaming properties and is excellent in feel during use, such as smoothness during hair washing.< / ph>

Claims

1. The following components (A) to (C): (A) a sulfate-based anionic surfactant, (B) monoglyceryl fatty acids, and (C) a cationic polymer which is at least one selected from the group consisting of the following components (C1) and (C2): A hair wash composition comprising: (C1) A cationic group-containing copolymer which is a copolymer of a monomer mixture containing the following monomers (c1-1), (c1-2) and (c1-3): Monomer (c1-1) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (1): 【Chemistry 1】 (In the formula, R １ represents a hydrogen atom or a methyl group, and R ２ represents a hydrogen atom, a linear or branched alkyl group or an alkenyl group having 1 to 4 carbon atoms, R ３ represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms. Monomer (c1-2) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (2): 【Chemistry 2】 (In the formula, R １ represents the same group as above, and R ４ and R ５ each independently represents an alkyl group or an alkenyl group having 1 to 4 carbon atoms, R ６ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; Y １ is -O-, -NH-, -CH ２ - or -O-CH ２ represents a CH(OH)- group, and Y １ Ga-CH ２ When -, Z １ represents a single bond or a linear or branched divalent saturated hydrocarbon group having from 1 to 3 carbon atoms; Y １ Ga-CH ２ When not -, Z １ represents a linear or branched divalent saturated hydrocarbon group having 1 to 4 carbon atoms; and Q represents a conjugate base of an acid. Monomer (c1-3) Crosslinkable monomer having two or more reactive unsaturated groups (C2) A hydrophobic cationized hydroxyethyl cellulose having a main chain derived from an anhydroglucose represented by the following general formula (3), in which the average number of moles of cationized ethyleneoxy groups per anhydroglucose unit is 0.01 or more and 3.0 or less, and the average number of moles of ethyleneoxy groups is 0.5 or more and 4.0 or less: 【Transformation 3】 (In general formula (3), R ７ , R ８ and R ９ are each independently represented by the following general formula (4): 【Chemistry 4】 and n is the average degree of polymerization of anhydroglucose and is a number of 50 to 5,000. In general formula (4), Y ２ and Y ３ is a hydrogen atom on one side and a group represented by the following general formula (5) 【Transformation 5】 p represents the number of ethyleneoxy groups contained in the general formula (4), and q represents the number of cationized ethyleneoxy groups (—CH(Y ２ )-CH(Y ３ )-O-), each of which is 0 or a positive integer. When neither p nor q is 0, the order of addition of the cationized ethyleneoxy group and the ethyleneoxy group does not matter, and when p and / or q is 2 or greater, either a block bond or a random bond may be used. When a plurality of substituents represented by general formula (4) are present in a molecule, the values ​​of p and q may be different among the substituents, but at least one of them has a q of 1 or greater. In general formula (5), R １０ ~R １２ each independently represents a linear or branched alkyl group having 1 to 18 carbon atoms; X － represents an anionic group. １２ At least one of the groups is a linear or branched alkyl group having 8 to 18 carbon atoms.

2. The hair wash composition according to claim 1, wherein the content of the component (B) is from 0.5% by mass to 15% by mass.

3. The hair wash composition according to claim 1, wherein the content of the component (C) is 0.03% by mass or more and 3.0% by mass or less.

4. The hair wash composition according to claim 1, wherein the content of the component (A) is 1.0% by mass or more and 20% by mass or less.

5. 2. The hair wash composition according to claim 1, wherein the component (C1) is an N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer.

6. 2. The hair wash composition according to claim 1, wherein the component (C2) is a polymer of a quaternary ammonium salt obtained by addition reaction of hydroxyethyl cellulose with a trimethylammonium-substituted epoxide and a lauryldimethylammonium-substituted epoxide.