Hair detergent composition

Abstract

To provide a hair detergent composition that uses hydrophobic silica and effectively attaches and remains on hair after washing, while having excellent storage stability.SOLUTION: Provided is a hair detergent composition comprising the following components (A) to (C): (A) an anionic surfactant; (B) one or more polymers selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, the polymer having a cationization density of 5.5 meq / g or less; and (C) hydrophobic silica having an average primary particle diameter of 5 nm or more and 100 nm or less; the mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) being 3 or more and 400 or less.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Particles formed from carbonates, silica, and the like have been used in various detergent compositions and contribute to achieving desired effects. For example, Patent Document 1 discloses a personal cleansing composition containing a cleansing surfactant, anionic particles, and a cationic polymer, and aims to enhance the adhesion and retention of particles as a beneficial agent to a surface treated with the composition by forming a complex aggregate of the anionic particles and the cationic polymer. Patent Document 2 discloses a hair washing composition having an emulsion structure containing hydrophobic inorganic particles, an oil-soluble dispersant, an aqueous solvent, a surfactant, and a hair washing component, and aims to provide sufficient foaming washing and impart volume, firmness, and strength to the hair after washing by fixing the hydrophobic inorganic particles in the hair. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2005-518426 [Patent Document 2] JP 2015-221786 A Summary of the Invention [Problem to be solved by the invention]

[0004] In this context, it is known that in order for a hair cleansing composition to impart a good feeling of increased volume to washed hair while maintaining this effect for a sufficient period, it is effective for particles to adhere to and remain on the hair, as described in the above patent documents. However, when particles are blended into a composition in an attempt to increase the adhesion and retention of the particles on hair, there is a problem that unnecessary sedimentation occurs in the composition over time, compromising stability, and none of the above patent documents have yet addressed this issue.

[0005] That is, the present invention relates to a hair cleansing composition which uses a specific hydrophobic silica and allows it to effectively adhere to and remain on hair after washing, while also having excellent storage stability. [Means for solving the problem]

[0006] Therefore, the present inventors have conducted various studies and have found that by containing hydrophobic silica having a limited average primary particle size in a specific mass ratio together with an anionic surfactant and a specific type of polymer showing a specific value of cationization density, it is possible to obtain a hair cleansing composition which effectively enhances the adhesion and residual ability of the hydrophobic silica to hair, imparts excellent firmness and body to hair as well as a long-lasting feeling of increased volume, and which maintains excellent storage stability of the composition itself.

[0007] Therefore, the present invention provides the following components (A) to (C): (A) Anionic surfactant (B) A polymer which is one or more selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, and has a cationization density of 5.5 meq / g or less. (C) Hydrophobic silica having an average primary particle size of 5 nm or more and 100 nm or less The present invention provides a hair cleansing composition comprising the above-mentioned components, wherein the mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) is 3 or more and 400 or less. Effect of the Invention

[0008] The hair cleansing composition of the present invention, when applied to hair, can impart excellent elasticity and body to the washed hair, effectively lift the roots of the hair, and provide a long-lasting voluminous feel. It can also effectively inhibit unwanted precipitation of hydrophobic silica, and maintain excellent storage stability for a long period of time. Therefore, it is possible to impart a natural, light finish to washed hair without excessive stickiness and to increase the freedom in styling, making it a highly practical hair cleansing composition. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will be described in detail below. The hair cleansing composition of the present invention contains an anionic surfactant as component (A). By containing such component (A), good cleansing properties, foaming properties and foam quality can be ensured. In the hair cleansing composition of the present invention, the hydrophobic part of component (A) is well adsorbed to the surface of the hydrophobic silica of component (C) to form micelle-like particles. Furthermore, these particles are associated with the polymer chains of component (B), and the dispersibility of component (C) in the composition can be effectively increased, and the storage stability of the composition itself can be effectively increased. In addition, when the hair cleansing composition of the present invention is applied to hair, during the process of dilution with water from washing to rinsing, a complex (coacervate) is gradually formed in which the micelle-like particles containing components (A) and (C) and component (B) gradually aggregate. This complex is effectively deposited on the hair surface, and since the complex exhibits excellent residual properties on the hair surface after drying, it becomes possible to effectively and sustainably impart a sense of firmness, resilience, and increased volume to the hair.

[0010] In addition, since component (A) adsorbs to the surface of component (C) and imparts a moderate negative charge, it effectively suppresses unnecessary adhesion and excessive aggregation of the micelle-like particles containing component (C) due to electrostatic repulsion, and thus suppresses unnecessary precipitation of the micelle-like particles containing component (C), thereby contributing to ensuring long-lasting storage stability. In addition, it allows component (C) to remain uniformly on the hair surface, which contributes to effectively imparting a sense of elasticity, strength, and volume to the hair.

[0011] Specific examples of the component (A) include one or more selected from sulfate salts, sulfonate salts, carboxylate salts, and N-acylamino acid salts. More specifically, the sulfate salt may be one or more selected from alkyl sulfate salts, alkenyl sulfate salts, polyoxyalkylene alkyl ether sulfate salts, polyoxyalkylene alkenyl ether sulfate salts, and polyoxyalkylene alkyl phenyl ether sulfate salts. The number of carbon atoms in the alkyl or alkenyl group constituting the sulfate salt is preferably 6 or more, more preferably 8 or more, and even more preferably 10 or more, and is preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less. Among such sulfates, one or more selected from alkyl sulfates and polyoxyalkylene alkyl ether sulfates are preferred, and polyoxyalkylene alkyl ether sulfates are more preferred.

[0012] More specifically, the sulfonate may be one or more selected from internal olefin sulfonate, α-olefin sulfonate, alkylbenzene sulfonate, alkenylbenzene sulfonate, alkane sulfonate, and aminoethyl sulfonate. Among such sulfonates, one or more selected from internal olefin sulfonates and α-olefin sulfonates are preferred, and the number of carbon atoms of the internal olefin sulfonates and α-olefin sulfonates is preferably 10 or more, more preferably 12 or more, and is preferably 22 or less, more preferably 18 or less.

[0013] More specifically, the carboxylate may be one or more selected from polyoxyalkylene alkyl ether carboxylates, polyoxyalkylene alkyl ether acetates, hydroxyalkanesulfonates, and fatty acid salts. The number of carbon atoms in the alkyl or alkane group constituting the carboxylate, or the number of carbon atoms in the fatty acid residue, is preferably 8 or more, more preferably 10 or more, and is preferably 22 or less, more preferably 18 or less. Among these carboxylates, polyoxyalkylene alkyl ether carboxylates are preferred, and those having an average added mole number of oxyethylene groups of 1-11 are more preferred, and those having an average added mole number of 2-6 are even more preferred.

[0014] More specifically, the N-acylamino acid salt may be one or more selected from N-acylglutamate, N-acylsarcosine salt, N-acylalanine salt, N-acylmethylalanine salt, and acylglycine salt. The number of carbon atoms in the acyl group constituting the N-acylamino acid salt is preferably 6 or more, more preferably 10 or more, and preferably 22 or less, more preferably 20 or less. Among such N-acylamino acid salts, N-acylalanine salts and N-acylmethylalanine salts are preferred, and N-acylmethylalanine salts are more preferred.

[0015] These salts include one or more selected from alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, other inorganic salts such as aluminum and zinc, ammonium salts, organic amine salts such as monoethanolamine, diethanolamine and triethanolamine, basic amino acid salts such as arginine salt, lysine salt, histidine salt and ornithine salt, etc. Among these, alkali metal salts and organic amine salts are preferred.

[0016] From the viewpoint of effectively increasing storage stability and the adsorption of component (C) to the hair surface, component (A) preferably contains one or more selected from sulfate ester salts, sulfonate salts, and carboxylate salts, and more preferably contains at least a sulfate ester salt. Furthermore, the content of sulfate ester salts in 100% by mass of component (A) is preferably 50% by mass or more, more preferably 80% by mass or more, and even more preferably 100% by mass.

[0017] The content of component (A) in the hair cleanser composition of the present invention is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, and even more preferably 10% by mass or more, from the viewpoint of cleansing ability, foaming ability, and foam quality, and from the viewpoint of ensuring good storage stability. Also, the content of component (A) in the hair cleanser composition of the present invention is preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 25% by mass or less, and even more preferably 21% by mass or less, from the viewpoint of effectively imparting a feeling of firmness and resilience and a feeling of increased volume to hair. And, the content of component (A) in the hair cleanser composition of the present invention is preferably 1 to 50% by mass, more preferably 3 to 30% by mass, even more preferably 5 to 25% by mass, and even more preferably 10 to 21% by mass.

[0018] The hair cleansing composition of the present invention contains, as component (B), one or more polymers selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, which have a cationization density of 5.5 meq / g or less. Such component (B) forms micelle-like particles by connecting to an end of a part of the component (A) adsorbed on the surface of component (C), and can effectively increase the dispersibility of component (C) in the composition and can effectively increase the storage stability of the composition itself, and can also suppress the occurrence of unnecessary squeaking during rinsing after application to hair. The term "cationic polymer" refers to a polymer having a substituent that becomes cationic when dissolved in water, and the term "amphoteric polymer" refers to a polymer having both a substituent that becomes cationic and a substituent that becomes anionic when dissolved in water.

[0019] A cationic polymer having a galactomannan skeleton is a cationic polymer in which a quaternary nitrogen-containing group is introduced into a galactomannan polysaccharide, and can be obtained, for example, by reacting a galactomannan polysaccharide with a cationizing agent. More specifically, the cationic polymer having a galactomannan skeleton and a cationization density of 5.5 meq / g or less can be one or more selected from cationized guar gum, cationized tara gum, cationized locust bean gum, and cationized fenugreek gum.

[0020] For example, commercially available cationized guar gum products include Jaguar series such as Jaguar C-13S, Jaguar C-14S, Jaguar C-14SK, and Jaguar C-17 (manufactured by Solvay, guar hydroxypropyltrimonium chloride). Commercially available cationized tara gum products include Catinal CTR-100 and Catinal CTR-200 (both manufactured by Toho Chemical Industry Co., Ltd., Caesalpinia spinosa hydroxypropyltrimonium chloride). Commercially available cationized locust bean gum products include Catinal CLB-100 (manufactured by Toho Chemical Industry Co., Ltd., locust bean hydroxypropyltrimonium chloride). Commercially available cationized fenugreek gum products include Catinal CF-100 (manufactured by Toho Chemical Industry Co., Ltd.). Among such cationic polymers having a galactomannan skeleton, cationic guar gum is preferred.

[0021] More specifically, the acrylic cationic polymer having a cationization density of 5.5 meq / g or less and the acrylic amphoteric polymer having a cationization density of 5.5 meq / g or less can be one or more selected from a diallyl quaternary ammonium salt-acrylamide copolymer, a diallyl quaternary ammonium salt-acrylic acid copolymer, a diallyl quaternary ammonium salt-acrylamide-acrylic acid copolymer, a methacrylamide alkyl quaternary ammonium salt-acrylic acid-acrylic acid ester copolymer, a methacryloyloxyalkyl quaternary ammonium salt-acrylamide copolymer, and a methacrylamide alkyl quaternary ammonium salt-acrylic acid-acrylamide copolymer.

[0022] Among such acrylic cationic polymers and acrylic amphoteric polymers, one or more selected from diallyl quaternary ammonium salt-acrylamide copolymers, diallyl quaternary ammonium salt-acrylic acid copolymers, diallyl quaternary ammonium salt-acrylamide-acrylic acid copolymers, and methacrylamide alkyl quaternary ammonium salt-acrylic acid-acrylic acid ester copolymers are preferred. Examples of commercially available products include MERQUAT 550, MERQUAT 740 (INCI name: Polyquaternium-7, diallyl quaternary ammonium salt-acrylamide copolymer, manufactured by Lubrizol Advanced Materials), MERQUAT 280N (INCI name: Polyquaternium-22, diallyl quaternary ammonium salt-acrylic acid copolymer, manufactured by Lubrizol Advanced Materials), MERQUAT 3331PR (INCI name: Polyquaternium-39, acrylamide-acrylic acid-dimethyldiallylammonium chloride copolymer liquid, manufactured by Lubrizol Advanced Materials), and MERQUAT 2001 (INCI name: Polyquaternium-47, diallyl quaternary ammonium salt-acrylamide-acrylic acid copolymer, methacrylamide alkyl quaternary ammonium salt-acrylic acid-acrylic acid ester copolymer, manufactured by Lubrizol Advanced Materials).

[0023] The cationization density of component (B) is 5.5 meq / g or less, preferably 4.5 meq / g or less, and preferably 1.0 meq / g or more, from the viewpoint of forming micelle-like particles well together with components (A) and (C) and exhibiting excellent residual properties of the complex on hair.

[0024] The content of component (B) in the hair cleanser composition of the present invention is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, and even more preferably 0.3% by mass or more, from the viewpoint of effectively imparting a feeling of firmness and resilience to hair and from the viewpoint of no squeaking during rinsing. Also, the content of component (B) in the hair cleanser composition of the present invention is preferably 3% by mass or less, more preferably 1% by mass or less, even more preferably 0.7% by mass or less, and even more preferably 0.4% by mass or less, from the viewpoint of ensuring good storage stability. And the content of component (B) in the hair cleanser composition of the present invention is preferably 0.005 to 3% by mass, more preferably 0.01 to 1% by mass, even more preferably 0.1 to 0.7% by mass, and even more preferably 0.3 to 0.4% by mass.

[0025] From the viewpoints of improving storage stability and improving the effect of imparting firmness, elasticity and volume to hair, the mass ratio of the content of component (A) to the content of component (B) ((A) / (B)) is preferably 5 or more, more preferably 10 or more, even more preferably 20 or more, and even more preferably 30 or more, and is preferably 1000 or less, more preferably 800 or less, even more preferably 500 or less, and even more preferably 300 or less. The mass ratio of the content of component (A) to the content of component (B) ((A) / (B)) is preferably 5 to 1000, more preferably 10 to 800, even more preferably 20 to 500, and even more preferably 30 to 300.

[0026] The hair cleansing composition of the present invention contains hydrophobic silica having an average primary particle size of 5 nm or more and 100 nm or less as component (C). Such component (C) has high static friction and excellent residual property on the hair surface, and can prevent excessive aggregation. Such component (C) can form a form associated with micelle-like particles and polymer chains together with components (A) and (B), and can suppress excessive aggregation and unnecessary precipitation of component (C) alone, ensuring highly sustained storage stability, and effectively increasing the adsorption and residual property of component (C) on the hair surface, thereby imparting excellent elasticity, body, and volume to hair. The term "hydrophobic silica" refers to silica particles having a contact angle with water of 90° to 180°. The contact angle with water is a value measured using a contact angle meter (for example, "DM500" manufactured by Kyowa Interface Science Co., Ltd.).

[0027] Specifically, preferred examples of component (C) include particles of silica whose surface has been subjected to a hydrophobic treatment. As the hydrophobic treatment on the surface of silica, from the viewpoint of suppressing excessive aggregation or unnecessary precipitation and ensuring excellent storage stability, silane treatment or silicone treatment is preferred, silane treatment is more preferred, and alkylsilane treatment is even more preferred.More specifically, the hydrophobic silica particles subjected to such treatment are preferably one or more selected from dimethylsilylated silica, trimethylsilylated silica, and dimethylpolysiloxane-modified silica, more preferably one or two selected from dimethylsilylated silica and trimethylsilylated silica, and even more preferably dimethylsilylated silica.

[0028] The average primary particle size of component (C) (average particle size of the primary particles) is from 5 nm to 100 nm, and from the viewpoint of imparting excellent firmness, strength and volume to hair, it is preferably from 10 nm to 50 nm. The term "primary particle" refers to a single particle that is the smallest independent unit without aggregation. The average primary particle size is a value measured by measuring the particle sizes of 200 randomly selected particles using a transmission electron microscope and calculating the average of the primary particle sizes. Here, from the viewpoints of excellent residual properties on the hair surface and effectively imparting firmness, elasticity and volume to the hair, the number of particles having a particle diameter of 100 nm or more among 200 randomly selected particles is preferably 50 or less, more preferably 30 or less, even more preferably 10 or less, still more preferably 5 or less, or it is even more preferable that there are substantially no particles having a particle diameter of 100 nm or more among 200 randomly selected particles.

[0029] The specific surface area of ​​component (C) is preferably 30 to 400 m 2 / g, more preferably 50 to 350 m 2 / g, and more preferably 90 to 300m 2 The specific surface area is a value measured by the BET method.

[0030] Although component (C) does not aggregate excessively by itself, a part of the primary particles of component (C) may aggregate moderately by itself and be present in the composition as aggregates. The average particle size of such aggregates is preferably 50 nm or more, more preferably 100 nm or more, and preferably 1000 nm or less, more preferably 500 nm or less.

[0031] The content of component (C) in the hair cleanser composition of the present invention is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more, from the viewpoint of effectively imparting a feeling of firmness and resilience and a feeling of increased volume to hair. Also, the content of component (C) in the hair cleanser composition of the present invention is preferably 4% by mass or less, more preferably 3% by mass or less, even more preferably 2% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of ensuring good storage stability. And, the content of component (C) in the hair cleanser composition of the present invention is preferably 0.05 to 4% by mass, more preferably 0.1 to 3% by mass, even more preferably 0.3 to 2% by mass, and even more preferably 0.5 to 1% by mass.

[0032] The hair wash composition of the present invention may further contain particles other than component (C). Specific examples of such particles other than component (C) include one or more types of inorganic particles selected from alumina, talc, kaolin, clay, bentonite, mica, zirconium oxide, magnesium oxide, titanium oxide, zinc oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, etc., and these particles whose surfaces have been subjected to a hydrophobic treatment. The mass ratio of the content of particles other than component (C) to the content of component (C) (particles other than component (C) / component (C)) is, from the viewpoint of suppressing excessive aggregation and unnecessary sedimentation and ensuring excellent storage stability, preferably 0.4 or less, more preferably 0.2 or less, even more preferably 0.1 or less, and still more preferably 0.05 or less.

[0033] The mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) is, from the viewpoints of ensuring good storage stability and imparting excellent elasticity, strength and volume to hair, 3 or more, preferably 4 or more, more preferably 5 or more, and 400 or less, preferably 200 or less, more preferably 100 or less, and even more preferably 70 or less. The mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) is 3 or more and 400 or less, preferably 4 to 200, more preferably 4 to 100, and even more preferably 5 to 70.

[0034] When the hair cleansing composition of the present invention is applied to hair, the average particle size of a complex (coacervate) in which the micelle-like particles containing components (A) and (C) and component (B) gradually agglomerate is, from the viewpoint of imparting excellent elasticity and volume to the hair, preferably 1 μm or more, more preferably 5 μm or more, and preferably 30 μm or less, and more preferably 10 μm or less.

[0035] The hair cleansing composition of the present invention may further contain an amphoteric surfactant (D) from the viewpoints of cleansing properties, foaming properties and foam quality, and of maintaining excellent storage stability of the composition itself. Component (D) may specifically be one or more selected from carbobetaine and sulfobetaine, more specifically one or more selected from carbobetaine and sulfobetaine having an alkyl group, alkenyl group or acyl group having 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms. Among these, one or more selected from lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, lauric acid amidopropyl hydroxysulfobetaine, and lauryl sulfobetaine are preferred, and one or two selected from lauric acid amidopropyl betaine and lauric acid amidopropyl hydroxysulfobetaine are more preferred.

[0036] From the viewpoints of cleansing ability, foaming ability and foam quality, the content of component (D) in the hair cleanser composition of the present invention is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more. From the viewpoint of ensuring excellent storage stability, the content of component (D) in the hair cleanser composition of the present invention is preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less. The content of component (D) in the hair cleanser composition of the present invention is preferably 0.1 to 20% by mass, more preferably 0.5 to 10% by mass, and even more preferably 1 to 5% by mass.

[0037] The hair cleansing composition of the present invention may further contain a nonionic surfactant (E) from the viewpoints of cleansing properties, foaming properties and foam quality, and of maintaining excellent storage stability of the composition itself.

[0038] Specific examples of the component (E) include one or more selected from polyoxyalkylene alkyl ethers, fatty acid alkanolamides, alkyl glycosides, and alkyl glyceryl ethers. More specifically, the polyoxyalkylene alkyl ether may be one in which the alkyl group has 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms. Of these, polyoxyethylene alkyl ether is preferred, and the average number of moles of oxyethylene groups added is more preferably 3 to 50, and even more preferably 4 to 16. The fatty acid alkanolamides include mono- or dialkanolamides having a fatty acid with 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms. The alkyl glycoside may have an alkyl group having 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms. The alkyl glyceryl ether may be one in which the alkyl group has 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms. Among these, fatty acid alkanolamides are more preferred.

[0039] From the viewpoints of cleansing ability, foaming ability and foam quality, the content of component (E) in the hair cleanser composition of the present invention is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more. From the viewpoint of ensuring excellent storage stability, the content of component (E) in the hair cleanser composition of the present invention is preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less. The content of component (E) in the hair cleanser composition of the present invention is preferably 0.1 to 20% by mass, more preferably 0.5 to 10% by mass, and even more preferably 1 to 5% by mass.

[0040] The hair cleansing composition of the present invention generally contains an aqueous medium from the viewpoint of dispersing or dissolving each component of the composition well while adjusting the content thereof to an appropriate level, and adjusting the composition to an appropriate viscosity. Examples of the aqueous medium include water; 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, and propylene glycol, and water is preferred. It is also preferred that the composition further contains water. Examples of water include ion-exchanged water and distilled water. The content of the aqueous medium in the hair cleansing composition of the present invention is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and preferably 95% by mass or less, more preferably 90% by mass or less, even more preferably 85% by mass or less. The content of the aqueous medium in the hair cleansing composition of the present invention is preferably 50 to 95% by mass, more preferably 60 to 90% by mass, even more preferably 70 to 85% by mass.

[0041] The viscosity of the hair cleanser composition of the present invention at 30°C is preferably 500 to 20,000 mPa·s, more preferably 500 to 10,000 mPa·s, and even more preferably 1,000 to 5,000 mPa·s, from the viewpoints of ensuring good storage stability, effectively enhancing cleaning performance by providing a sufficient amount of foam, and enhancing applicability to the application site. Thus, the hair cleanser composition of the present invention can exhibit excellent storage stability even if it is in the low viscosity range (1,000 to 5,000 mPa·s). The viscosity here means a value measured by a Brookfield type viscometer.

[0042] In addition to the above-mentioned components, the hair cleanser composition of the present invention may contain other components commonly used as cosmetic raw materials, provided that the effects of the present invention are not impaired. Examples of such components include polyhydric alcohols, texture improvers, thickeners, fragrances, ultraviolet absorbers, visible light absorbers, chelating agents, antioxidants, colorants, preservatives, pH adjusters, viscosity adjusters, pearlescent luster agents, wetting agents, etc.

[0043] The hair cleansing composition of the present invention may be in any form of liquid, milky lotion, cream or foam.

[0044] The hair cleansing composition of the present invention can be produced by a method including the following steps 1 to 3. Step 1: A step of dissolving component (A) in a part or all of an aqueous medium containing water to obtain a treated product 1. Step 2: Adding and mixing component (C) to the resultant treated product 1 to obtain mixture 2. Step 3: A step of adding an aqueous medium containing the remaining water and component (B) to the obtained mixture 2 and mixing them to obtain mixture 3. Furthermore, from the viewpoints of cleaning properties, foaming properties and foam quality, after step 3, step 4 may be included in which one or more types selected from components (D), (E) and (F) are added to the obtained mixture 3 and mixed.

[0045] The aqueous solvent used in step 1 may be an amount sufficient to mix components (A) and (C), and may be a part or all of the aqueous solvent contained in the hair cleanser composition. From the viewpoints of ease of production, sufficient mixing of components (A) and (C), and favorable formation of micelle-like particles, the amount of the aqueous solvent is preferably 0.5 to 4 times, and more preferably 1 to 3 times, the total amount of components (A) and (C). From the viewpoint of favorably forming micelle-like particles together with component (A) and component (C), it is preferable that surfactants other than component (A) and polymers containing component (B) are not substantially blended in steps 1 and 2. Here, "substantially not blended" means that the blending amount of surfactants other than component (A) and polymers containing component (B) is preferably 0.5% by mass or less, more preferably 0.1% by mass or less, and even more preferably 0.01% by mass or less, of the total amount of the treated material or mixture used in step 1 or step 2.

[0046] In steps 1 to 4, from the viewpoint of improving solubility and mixability, it is preferable to carry out a stirring operation. Furthermore, from the viewpoint of further improving the solubility and mixability of the blended components, it is preferable to carry out a heating operation, specifically, heating is preferably carried out to a range of 50 to 100° C., more preferably to a range of 60 to 90° C., and even more preferably to a range of 70 to 80° C. When heated, it is preferable to cool to 20 to 40° C., optionally with stirring.

[0047] Specifically, first, component (A) is dissolved in a part of an aqueous medium such as water to obtain a treated product 1 (step 1), and then component (C) is added to the treated product 1 and mixed to obtain a mixture 2 in which each component is uniformly dispersed (step 2). Next, the remaining aqueous medium is added to the obtained mixture 2, and the mixture is heated to 50 to 100°C. After that, component (B) is added and stirred until uniform, to obtain a mixture 3 (step 3). The mixture 3 thus obtained may be used as the hair cleansing composition of the present invention, or, if necessary, the components (D) to (F) and other components may be added to the mixture 3 thus obtained and mixed to dissolve or disperse each component uniformly (step 4).The mixture may then be cooled to 20 to 40°C with further stirring to use the mixture thus obtained as the hair cleansing composition of the present invention.

[0048] To wash hair with the hair cleanser composition of the present invention, specifically, for example, the hair may be moistened with water in advance, the hair cleanser composition of the present invention may be applied to the hair to wash it, and then the hair may be rinsed with water.

[0049] In this way, the hair cleanser composition of the present invention not only imparts excellent elasticity and body to washed hair, but also effectively lifts the roots of the hair, providing a sustained feeling of increased volume. It also effectively inhibits unwanted precipitation of hydrophobic silica, providing excellent storage stability over long periods of time. Therefore, by using the hair cleanser composition of the present invention, it is possible to provide a method for improving the firmness or stiffness of hair by washing the hair with the hair cleanser composition, optionally rinsing and then drying, or a method for increasing the volume of hair by washing the hair with the hair cleanser composition, optionally rinsing and then drying. Furthermore, preparing the hair cleanser composition of the present invention is also highly useful as a method for improving the storage stability of a hair cleanser composition containing hydrophobic silica, more specifically, as a method for suppressing precipitation of hydrophobic silica in a hair cleanser composition containing hydrophobic silica.

[0050] In relation to the above-mentioned embodiment, the present invention further discloses the following hair cleansing composition. [1] The following components (A) to (C): (A) Anionic surfactant (B) A polymer which is one or more selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, and has a cationization density of 5.5 meq / g or less. (C) Hydrophobic silica having an average primary particle size of 5 nm or more and 100 nm or less wherein the mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) is 3 or more and 400 or less. [2] The hair cleansing composition according to the above [1], wherein component (A) is one or more members selected from the group consisting of sulfate ester salts, sulfonate salts, carboxylate salts, and N-acylamino acid salts. [3] The hair cleanser composition according to [1] or [2] above, wherein the content of the sulfate ester salt in 100% by mass of component (A) is more preferably 50% by mass or more, even more preferably 80% by mass or more, and still more preferably 100% by mass. [4] The hair cleanser composition according to any one of the above [1] to [3], wherein the content of component (A) is preferably 1 mass% or more, more preferably 3 mass% or more, even more preferably 5 mass% or more, still more preferably 10 mass% or more, and preferably 50 mass% or less, more preferably 30 mass% or less, even more preferably 25 mass% or less, and even more preferably 21 mass% or less.

[0051] [5] The hair cleansing composition according to any one of the above [1] to [4], wherein the cationization density of component (B) is preferably 4.5 meq / g or less, and preferably 1.0 meq / g or more. [6] The hair wash composition according to any one of the above [1] to [5], wherein the content of component (B) is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.3% by mass or more, and preferably 3% by mass or less, more preferably 1% by mass or less, even more preferably 0.7% by mass or less, and even more preferably 0.4% by mass or less. [7] The hair wash composition according to any one of the above [1] to [6], wherein the mass ratio of the content of component (A) to the content of component (B) ((A) / (B)) is preferably 5 or more, more preferably 10 or more, even more preferably 20 or more, still more preferably 30 or more, and is preferably 1,000 or less, more preferably 800 or less, even more preferably 500 or less, and still more preferably 300 or less.

[0052] [8] The hair cleansing composition according to any one of the above [1] to [7], wherein component (C) is hydrophobic silica whose surface has been treated with a silane or silicone, preferably with a silane, more preferably with an alkylsilane. [9] The hair cleansing composition according to any one of the above [1] to [8], wherein the average primary particle size of component (C) is preferably from 10 nm to 50 nm.

[10] The hair wash composition according to any one of the above [1] to [9], wherein the content of component (C) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, and preferably 4% by mass or less, more preferably 3% by mass or less, even more preferably 2% by mass or less, and still more preferably 1% by mass or less.

[11] The hair wash composition according to any one of the above [1] to

[10] , wherein the mass ratio of the content of component (A) to the content of component (C) ((A) / (C)) is preferably 4 or more, more preferably 5 or more, and is preferably 200 or less, more preferably 100 or less, and even more preferably 70 or less.

[0053]

[12] The hair cleanser composition according to any one of the above [1] to

[11] , wherein when the hair cleanser composition of the present invention is applied to hair, the average particle size of a complex (coacervate) formed by gradually agglomerating micelle-like particles containing component (A) and component (C) with component (B) is preferably 1 μm or more, more preferably 5 μm or more, and preferably 30 μm or less, more preferably 10 μm or less.

[13] The hair cleanser composition according to any one of the above [1] to

[12] , further comprising an amphoteric surfactant (D), wherein the content of such component (D) is preferably 0.1 mass% or more, more preferably 0.5 mass% or more, even more preferably 1 mass% or more, and preferably 20 mass% or less, more preferably 10 mass% or less, and even more preferably 5 mass% or less.

[14] The hair cleanser composition according to any one of the above [1] to

[13] , further comprising a nonionic surfactant (E), wherein the content of such component (E) is preferably 0.1 mass% or more, more preferably 0.5 mass% or more, even more preferably 1 mass% or more, and preferably 20 mass% or less, more preferably 10 mass% or less, and even more preferably 5 mass% or less.

[15] The hair wash composition according to any one of the above [1] to

[14] , which has a viscosity at 30°C of preferably 500 to 20,000 mPa·s, more preferably 500 to 10,000 mPa·s, and even more preferably 1,000 to 5,000 mPa·s.

[16] The following components (A) to (C): (A) Anionic surfactant (B) A polymer which is one or more selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, and has a cationization density of 5.5 meq / g or less. (C) Hydrophobic silica having an average primary particle size of 5 nm or more and 100 nm or less and a mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) is 3 or more and 400 or less, the method for producing the hair cleanser composition comprising the following steps 1 to 3: Step 1: A step of dissolving component (A) in a part of an aqueous medium containing water to obtain a treated product 1 Step 2: Adding and mixing component (C) to the resultant treated product 1 to obtain mixture 2. Step 3: A step of adding an aqueous medium containing the remainder of water and component (B) to the obtained mixture 2 and mixing them to obtain mixture 3.

[17] A method for producing the hair wash composition according to

[16] above, comprising the step of adding, after step 3, one or more components selected from components (D), (E) and (F) to the mixture 3 obtained and mixing them.

[0054]

[18] A method for improving the firmness or stiffness of hair, comprising washing the hair with the hair cleansing composition according to any one of the above [1] to

[15] , optionally rinsing the hair, and then drying the hair.

[19] A method for adding volume to hair, comprising washing the hair with the hair cleansing composition according to any one of the above [1] to

[15] , optionally rinsing the hair, and then drying the hair.

[20] A method for improving storage stability in a hair wash composition containing the following components (A) to (C), comprising adjusting the mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) to be 3 or more and 400 or less: (A) Anionic surfactant (B) A polymer which is one or more selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, and has a cationization density of 5.5 meq / g or less. (C) Hydrophobic silica having an average primary particle size of 5 nm or more and 100 nm or less.

[21] A method for suppressing precipitation of hydrophobic silica in a hair wash composition containing the following components (A) to (C), comprising adjusting the mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) to be 3 or more and 400 or less: (A) Anionic surfactant (B) A polymer which is one or more selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, and has a cationization density of 5.5 meq / g or less. (C) Hydrophobic silica having an average primary particle size of 5 nm or more and 100 nm or less. EXAMPLES

[0055] The present invention will now be described in detail with reference to the following examples. In the tables, the content of each component is expressed as mass % unless otherwise specified.

[0056] [Examples 1 to 17, Comparative Examples 1 to 10] Each hair cleansing composition was prepared by the above-mentioned production method according to the formulation shown in Tables 1 to 3. Then, using the obtained hair cleansing composition, measurements and evaluations were carried out according to the following methods. The results are shown in Tables 1 to 3.

[0057] Viscosity measurement Each detergent composition was placed in a glass bottle and allowed to stand at 30° C., after which the viscosity was measured using a Brookfield viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.) (rotor No. 3, 12 rpm, 1 minute later).

[0058] <Evaluation of volume-up effect> For the evaluation, 170 hairs / cm2 were placed on a sheet measuring 6.5 x 6.5 cm in area, with 20 cm long hairs placed in the same direction at an angle of 60°. 2 A tress with hair transplantation at a density of 100x100mm was used. First, the tresses were washed with 1 g of each hair cleansing composition, rinsed with water, and then placed facing down so that the hair hung vertically. Next, the tresses were dried by blowing hot air from a hair dryer against the sides of the hair from a horizontal distance of 30 cm. Next, the dried tress was placed with the hair growth side facing upwards, and the height from the sheet surface to the top of the hair (the rising height of the hair roots) was measured when the entire hair was brushed in the opposite direction to the hair growth direction.

[0059] For a hair cleansing composition prepared in the same manner as in Example 1 except that component (C) was not added, the height from the sheet surface to the top of the hair was measured in the same manner and found to be 24 mm. By using this value as a reference value, it can be evaluated that the greater the measured values ​​obtained are, the easier it is for the roots of the hair to stand up and the greater the volume-increasing effect, and therefore the volume-increasing effect was expressed according to the following evaluation formula. Volume-increasing effect (%)=(height from the sheet surface to the top of the hair using each hair cleansing composition−reference value (24 mm)) / reference value (24 mm)×100

[0060] Evaluation of firmness and elasticity 1g of healthy hair (10cm long) was tied together, 0.2g of hair cleanser was applied to the bundle, lathered for 30 seconds, and then rinsed with running water for 10 seconds. The hair was then towel-dried and then dried with a hair dryer. Five expert panelists evaluated the firmness and resilience of the hair on a 5-point scale according to the following criteria. The evaluation results were shown as the average of the sensory evaluations by the five expert panelists.

[0061] Sensory evaluation 5 points: Firm and resilient 4 points: Somewhat firm and resilient 3 points: normal 2 points: Not very firm 1 point: No firmness

[0062] 《Storage stability》 The hair cleanser was poured into a cylindrical storage bottle having a body diameter of 5 cm and a height of 10 cm to a height of 9 cm, and the storage bottle was then stored for 30 days at 50° C. Next, the sedimentation of component (C) was observed from the side of the storage bottle, and the height (mm) from the bottom of the storage bottle to the top of the sedimented part was measured and evaluated according to the following criteria. A: No settling was observed (height 0 mm), and the stability over time was excellent. B: The height is less than 10 mm and the stability over time is somewhat excellent. C: The height is 10 mm or more, and the stability over time is poor.

[0063] [Table 1]

[0064] [Table 2]

[0065]

Table 3

Claims

1. The following components (A) to (C): (A) Anionic surfactant (B) One or more polymers selected from cationic polymers having a galactomannan skeleton, acrylic cationic polymers, acrylic amphoteric polymers, and mixtures thereof, and having a cationization density of 5.5 meq / g or less. (C) Hydrophobic silica having an average primary particle size of 5 nm or more and 100 nm or less wherein the mass ratio ((A) / (C)) of the content of component (A) to the content of component (C) is 3 or more and 400 or less.

2. 2. The hair cleanser composition according to claim 1, wherein the mass ratio ((A) / (B)) of the content of component (A) to the content of component (B) is 5 or more and 1,000 or less.

3. The hair cleansing composition according to claim 1 or 2, wherein component (A) comprises at least a sulfate ester salt.

4. The hair cleanser composition according to claim 1 or 2, wherein the content of component (B) is from 0.005% by mass to 3% by mass.

5. 3. The hair cleansing composition according to claim 1, wherein the component (C) is hydrophobic silica particles whose surface is treated with silane or silicone.