Shampoo composition and hair treatment kit

Abstract

To provide a shampoo composition to be used after hair dyeing treatment with an oxidation dye or a direct dye, the shampoo composition capable of effectively preventing the outflow of the dye from the hair while retaining foaming performance and cleaning power.SOLUTION: A shampoo composition contains (A) a protein hydrolysate with a high constituent ratio of hydrophobic amino acid residues, (B) an ampholytic surfactant and (C) an anionic surfactant. When the total amount of the composition is 100 mass%, the content of component (C) is 10 mass% or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a shampoo composition and a hair treatment kit. More specifically, the present invention relates to a shampoo composition and a hair treatment kit comprising the shampoo composition and an oxidative hair dye composition or a hair dye composition. [Background technology]

[0002] Shampoos containing various surfactants often contain various protein hydrolysates to provide hair conditioning effects and repair damaged hair. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-47147 [Patent Document 2] Japanese Patent Publication No. 63-150212 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-280326

[0004] The aforementioned Patent Document 1 relates to a shampoo composition for use on dyed hair, which contains one or more surfactants selected from anionic surfactants and amphoteric surfactants, arginine and / or a salt thereof, and has a pH of 4 to 7. While Example 5 shows the incorporation of keratin hydrolyzate, the origin and type of the raw keratin are unknown, and the effects of incorporating keratin hydrolyzate are not described or suggested. The shampoo composition is said to condition hair after dyeing, inhibit color changes, and improve color retention.

[0005] The aforementioned Patent Document 2 relates to a shampoo composition containing, as essential ingredients, (A) an anionic or amphoteric surfactant, (B) a specific chelating agent, and (C) a peptide or its derivative with an average molecular weight of 400 to 10,000 used as a calcium deposit inhibitor. An example is given in which keratin hydrolysate with a weight-average molecular weight of 1500 is blended as the aforementioned component (C) (Table 3). However, while feather keratin is exemplified as the keratin, the specific type of feather keratin is unknown. Furthermore, this shampoo composition is said to have excellent cleansing and foaming properties, as well as excellent conditioning effects for hair damaged by permanent waving or other treatments. The purpose of the inclusion of component (C) is to prevent calcium deposition from tap water on damaged hair during shampooing, and there is no mention of its relationship with hair dyes or hair coloring agents used in combination with the aforementioned component (A).

[0006] The aforementioned Patent Document 3 describes a hair dyeing pretreatment method in which a keratin hydrolyzate having a number-average molecular weight of 300 to 1000, obtained by hydrolyzing keratin derived from animal hair, including feathers, is impregnated into hair as a liquid, and then an acid-containing liquid is applied to repolymerize the keratin hydrolyzate. This method is expected to provide a hair conditioning effect and also improve dyeability with hair dyes. Therefore, the present invention does not relate to shampoos, and in particular has no connection with shampoo compositions used after hair dyeing. Furthermore, the keratin hydrolyzate-containing liquid and acid-containing liquid may contain various surfactants as optional ingredients, but the examples contain only cationic surfactants. DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0007] In shampoo compositions containing various surfactants, anionic surfactants and amphoteric surfactants are often used in combination. Shampoos that use these surfactants in combination are said to have excellent cleansing properties as well as excellent foaming, foam retention, and foam quality. Hereinafter, the term "foam performance" refers collectively to foam-related properties such as foaming, foam retention, and foam quality. The reason why the shampoo containing both anionic and amphoteric surfactants has excellent cleansing and foaming properties is thought to be due to the compounding effect of the anionic and amphoteric surfactants, as well as a certain interaction between them. However, research by the present inventors has revealed that when such shampoos are used on dyed hair, there are problems such as loss of dye from the hair (color fading) and a corresponding change in the dyed color (discoloration) to a non-negligible extent.

[0008] Therefore, the technical problem to be solved by the present invention is to solve the problems of color fading, etc., in a shampoo used after hair dyeing with an oxidation hair dye or hair dye, while maintaining the excellent foaming performance and cleansing properties of a shampoo. In the process of investigating means for solving the above problem, the present inventors focused on the following two points, and have completed the present invention.

[0009] First, the color fading of oxidative dye polymers and direct dyes during shampooing after hair dyeing is considered to be a cleansing phenomenon similar to the removal of dirt such as dust and sebum from the hair. However, oxidative dye polymers are embedded in the hair, while direct dyes are ionically bonded to the hair surface, making them more difficult to remove from the hair than simply adhering dirt or sebum. In other words, it may be possible to weaken the cleansing power of a shampoo to a level where "dirt is sufficiently removed from the hair, but the dye color is less likely to fade." To achieve this, it is conceivable to reduce the amount of anionic surfactants, which are the main factor in cleansing power, to be included.

[0010] Second point of view: If the amount of anionic surfactant is reduced according to the first point of view, the excellent foaming performance of the shampoo will be significantly impaired. Therefore, we investigated ways to compensate for the reduction in the amount of anionic surfactant by adding an anionic component with foaming properties, and as a result, we arrived at keratin hydrolysate derived from waterfowl feathers. The addition of this hydrolyzate improved foam performance. Furthermore, the shampoo's excellent foam performance and cleansing ability were well balanced, suggesting that a certain degree of interaction occurs between the hydrolyzate and the amphoteric surfactant, as occurs with anionic surfactants. Furthermore, unlike typical protein hydrolyzates, this hydrolyzate has the advantage of being composed of a high proportion of hydrophobic amino acid residues, which means it has a high affinity with hair and is expected to penetrate easily into the hair. [Means for solving the problem]

[0011] (First invention) The first invention of the present application, which aims to solve the above-mentioned problems, is a shampoo composition containing (A) a protein hydrolysate having a high proportion of hydrophobic amino acid residues, (B) an amphoteric surfactant, and (C) an anionic surfactant, wherein the content of component (C) is 10% by mass or less when the total amount of the composition is taken as 100% by mass. Regarding this first invention, it is known that keratin derived from waterfowl feathers is a protein with a high proportion of hydrophobic amino acid residues, and this is presumed to be related to the free movement of waterfowl on or underwater.

[0012] (Second Invention) In the second invention of the present application for solving the above problems, the component (A) in the shampoo composition of the first invention is a keratin hydrolysate derived from waterfowl feathers.

[0013] (Third Invention) In a third invention of the present application for solving the above problems, the content of component (C) in the shampoo composition of the first or second invention is 0.1% by mass or more.

[0014] (Fourth Invention) In the fourth invention of the present application for solving the above-mentioned problems, the mass ratio (A) / [(B)+(C)] of the content of component (A) to the total content of component (B) and component (C) in the shampoo composition according to any one of the first to third inventions is within the range of 0.001 to 1.5.

[0015] (Fifth Invention) In a fifth invention of the present application for solving the above problems, the shampoo composition according to any one of the first to fourth inventions further contains (D) taurine.

[0016] (Sixth Invention) In a sixth aspect of the present invention for solving the above problems, the shampoo composition according to any one of the first to fifth aspects has a pH in the range of 3-7.

[0017] (7th invention) The seventh invention of the present application, which aims to solve the above-mentioned problems, is a hair treatment kit comprising an oxidative hair dye composition or a hair dye composition containing a direct dye, and a shampoo composition according to any one of the first to sixth inventions.

[0018] The shampoo composition according to the seventh invention is used as a shampoo after hair dyeing using an oxidative hair dye composition or a hair dye composition. The oxidative hair dye composition or hair dye composition and the shampoo composition may both be packaged as a kit product that is clearly visible from the outside, but the two may also be packaged and sold separately from the outside, but be linked as a kit in their product descriptions, etc. [Effects of the Invention]

[0019] (Effects of the first invention) The shampoo composition of the first invention contains (B) an amphoteric surfactant and (C) anionic surfactant as surfactants, and the content of component (C) is 10% by mass or less when the total amount of the composition is taken as 100% by mass. This ensures that the shampoo has sufficient cleansing properties to sufficiently remove dirt such as dust and sebum, while significantly suppressing dye fading. Moreover, the reduction in foaming performance, such as foaming ability, caused by the anionic surfactant content being 10% by mass or less is compensated for by the incorporation of component (A).

[0020] (Effects of the second invention) There are no specific limitations on the type of component (A), but keratin hydrolysate derived from waterfowl feathers is particularly preferred.

[0021] (Effects of the third invention) If the content of component (C) is too low, there are concerns from the viewpoint of achieving both excellent foaming performance and cleansing properties in the shampoo composition, so it is more preferable that the content of component (C) is 0.1 mass % or more.

[0022] (Effect of the fourth invention) A mass ratio (A) / [(B)+(C)] within the range of 0.001 to 1.5 is particularly preferred in that it provides both excellent foaming performance and cleansing properties in the shampoo composition and also inhibits color fading of the dye during shampooing.

[0023] (Effect of the fifth invention) When the shampoo composition further contains (D) taurine, the effect of the first invention is further enhanced. This is thought to be because the incorporation of taurine promotes the astringent action of hair and prevents the outflow of dye (color fading).

[0024] (Effect of the sixth invention) If the pH of the shampoo composition is 3 or higher, the color of the hair is less likely to change after dyeing. If the pH of the shampoo composition is 7 or lower, the hair that has swollen due to dyeing will contract, preventing the dye from flowing out.

[0025] (Effect of the seventh invention) It is convenient for customers to provide a hair treatment kit in which a shampoo composition to be used after hair dyeing with an oxidative hair dye composition or a hair dye composition is combined with the oxidative hair dye composition or a hair dye composition. BEST MODE FOR CARRYING OUT THE INVENTION

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments for carrying out the present invention will be described, including the best mode thereof. The technical scope of the present invention is not limited to the following embodiments.

[0027] [Shampoo composition] The shampoo composition of the present invention contains a protein hydrolyzate having a high proportion of hydrophobic amino acid residues as component (A), an amphoteric surfactant as component (B), and an anionic surfactant in an amount of 10% by mass or less, based on 100% by mass of the total amount of the composition, as component (C). Preferably, the shampoo composition further contains taurine as component (D). These components are described in detail below.

[0028] The method of using the shampoo composition is not particularly limited, and it can be used as a normal shampoo, but it is preferably used as a shampoo immediately after or after a certain period of time has passed after hair dyeing with the oxidative hair dye composition or hair dye composition. It can also be used after rinsing or treatment after hair dyeing with the oxidative hair dye composition or hair dye composition. In this case, the type of direct dye contained in the hair dye composition is not limited, but it is more preferable that the hair dye composition contains an ionic direct dye such as an acid dye or a basic dye.

[0029] The formulation of the shampoo composition can be selected from various known formulations, such as liquid, emulsion, cream, gel, paste, spray mist, aerosol foam, etc. Liquid and gel forms are particularly preferred.

[0030] The pH of the shampoo composition is not limited, but for the reasons described in the section "Effects of the Sixth Invention," a pH of 3 to 7 is preferred, with a pH of 4 to 6 being particularly preferred. As described above as the seventh invention, the shampoo composition can also be provided as a hair treatment kit in combination with an oxidative hair dye composition or a hair dye composition containing a direct dye.

[0031] Key Components of Shampoo Compositions (Component (A)) A particularly preferred protein hydrolysate having a high proportion of hydrophobic amino acid residues (component A) is keratin hydrolysate derived from waterfowl feathers. "Waterfowl" refers to birds that can move on or under freshwater or saltwater, and includes a variety of waterfowl such as ducks, geese, cormorants, little grebes, swans, penguins, and gulls. Due to their behavioral characteristics, these waterfowl are thought to have a genetic trait in which the keratin in their feathers has a high proportion of hydrophobic amino acid residues.

[0032] The molecular weight of the keratin hydrolysate derived from waterfowl feathers is not particularly limited, but an excessively large molecular weight, such as an average molecular weight exceeding 10,000, may make it difficult to penetrate into hair, as described in the "Second Perspective" section. A suitable molecular weight, for example, is a number average molecular weight measured by gel permeation chromatography (GPC) of about 200 to 4,000, more preferably about 300 to 3,000, and particularly preferably about 400 to 2,000. Keratin hydrolysates also include salt forms. The content of component (A) in the shampoo composition is not limited, but is preferably in the range of 0.01 to 10% by mass, particularly preferably 0.3 to 5% by mass, and even more particularly preferably 0.2 to 1% by mass, assuming the total amount of the composition to be 100% by mass.

[0033] ((B) component) Examples of the amphoteric surfactant that is component (B) include amino acid type amphoteric surfactants and betaine type amphoteric surfactants.

[0034] Examples of amino acid amphoteric surfactants include glycine amphoteric surfactants such as N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium (sodium lauroamphoacetate), alkyldiaminoethylglycine hydrochloride, sodium lauryldiaminoethylglycine, and palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium, and aminopropionic acid amphoteric surfactants such as sodium laurylaminopropionate, sodium laurylaminodipropionate, and triethanolamine laurylaminopropionate. Among these, from the viewpoints of foam performance and detergency, aminopropionic acid amphoteric surfactants such as sodium laurylaminopropionate, sodium laurylaminodipropionate, and triethanolamine laurylaminopropionate are preferred, with sodium laurylaminopropionate being particularly preferred.

[0035] Specific examples of betaine-type amphoteric surfactants include aminoacetic acid betaine-type amphoteric surfactants such as lauryl dimethyl aminoacetic acid betaine, coconut oil alkyl betaine, myristyl dimethyl aminoacetic acid betaine, sodium stearyl dimethyl betaine, coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, ricinoleic acid amidopropyl betaine, and stearyl dihydroxyethyl betaine; and sulfobetaine-type amphoteric surfactants such as lauryl hydroxysulfobetaine. Among these, from the viewpoints of foam performance and detergency, aminoacetic acid betaine-type amphoteric surfactants such as lauryl dimethyl aminoacetic acid betaine, coconut oil alkyl betaine, myristyl dimethyl aminoacetic acid betaine, sodium stearyl dimethyl betaine, coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, ricinoleic acid amidopropyl betaine, and stearyl dihydroxyethyl betaine are preferred, with coconut oil fatty acid amidopropyl betaine and lauric acid amidopropyl betaine being particularly preferred.

[0036] The content of the amphoteric surfactant in the shampoo composition is not limited, but is preferably in the range of 0.1 to 30% by mass, particularly preferably in the range of 0.5 to 20% by mass, even more particularly preferably in the range of 1 to 15% by mass, and especially more particularly preferably 4 to 12% by mass, assuming the total amount of the composition to be 100% by mass.

[0037] ((C) component) The component (C) is an anionic surfactant. Examples of anionic surfactants include sodium lauryl sulfate, sodium cetyl sulfate, sodium polyoxyethylene (hereinafter abbreviated as POE) lauryl ether sulfate, ammonium POE lauryl ether sulfate, sodium lauroylmethyl-β-alanine, hydrogenated sodium coconut oil fatty acid glyceryl sulfate, sulfate ester salts of higher fatty acid alkylolamides, sulfated castor oil, lauryl phosphate, POE oleyl ether phosphate, tetradecene sulfonate, sulfonate salts of higher fatty acid esters, sodium coconut oil fatty acid methyl taurate, triethanolamine dodecylbenzenesulfonate, sodium sulfosuccinate, sodium lauroyl sarcosine, sodium N-lauroyl-L-glutamate, triethanolamine N-coconut oil fatty acid acyl-L-glutamate, and sodium POE lauryl ether acetate. Among these, from the viewpoints of foam performance and detergency, sodium lauryl sulfate, sodium cetyl sulfate, sodium POE lauryl ether sulfate, sodium lauroylmethyl-β-alanine, sodium coconut oil fatty acid methyl taurate, sodium N-lauroyl-L-glutamate, and N-coconut oil fatty acid acyl-L-glutamate triethanolamine are preferred, and sodium lauroylmethyl-β-alanine and N-coconut oil fatty acid acyl-L-glutamate triethanolamine are particularly preferred.

[0038] The content of the anionic surfactant in the shampoo composition is 10% by mass or less, more preferably 9% by mass or less, and particularly preferably 8% by mass or less, when the total amount of the composition is 100% by mass. On the other hand, the lower limit of the content is not particularly limited, but for the reasons described in the section "Effects of the Third Invention," it is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, particularly preferably 1% by mass or more, and even particularly preferably 5% by mass or more.

[0039] (Mass ratio of the contents of components (A) to (C)) The mass ratio (A) / [(B)+(C)] of the content of component (A) to the total content of components (B) and (C) in the shampoo composition is not limited, but is preferably within the range of 0.001 to 1.5, more preferably within the range of 0.003 to 1, and particularly preferably within the range of 0.005 to 0.7. It is preferably within the range of 0.001 to 1.0, more preferably within the range of 0.005 to 0.5, and particularly preferably within the range of 0.01 to 0.07.

[0040] ((D) component) Component (D) is taurine, an aminosulfonic acid. It is preferable for the shampoo composition to contain taurine for the reasons described above in the "Effects of the Fourth Invention" section. The taurine content in the shampoo composition can be determined as appropriate, but can be, for example, within the range of 0.01 to 5% by mass, and more preferably within the range of 0.05 to 3% by mass, assuming the total amount of the composition to be 100% by mass.

[0041] [Other ingredients in shampoo composition] In addition to the components (A) through (D) described above, the shampoo composition of the present invention may optionally or arbitrarily contain one or more of the following ingredients, so long as they do not impair the properties of the shampoo composition or the effects of the present invention: oily components, surfactants other than components (B) and (C), polymeric substances, protein hydrolysates other than component (A), pH buffer components, sugars, amino acids other than component (C), vitamins, ceramides, chelating agents, fragrances, disinfectants / preservatives, UV absorbers, propellants, thickeners, animal and plant extracts, etc. Specific examples of some of these ingredients are listed below.

[0042] (Oily ingredients) Examples of oily components include silicone derivatives, polyhydric alcohols, fats and oils, waxes, higher alcohols, higher fatty acids, alkyl glyceryl ethers, and esters.

[0043] Examples of silicone derivatives include dimethylpolysiloxane and its terminal hydroxy-modified derivatives (e.g., dimethiconol), poly(oxyethylene-oxypropylene)-butylene-methylpolysiloxane copolymer, polyether-modified silicone, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, amino-modified silicone, dimethicone / vinyldimethicone crosspolymer, betaine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, and the like, with poly(oxyethylene-oxypropylene)-butylene-methylpolysiloxane copolymer, dimethiconol, or polyether-modified silicone being particularly preferred.

[0044] Examples of polyhydric alcohols include glycols, glycerins, alicyclic polyols, etc. Examples of glycols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, 1,3-butylene glycol, etc. Examples of glycerins include glycerin, diglycerin, polyglycerin, etc. Examples of alicyclic polyols include cyclopentane polyols and cyclohexane polyols such as inositol.

[0045] Examples of fats and oils include various vegetable oils, animal oils, etc. Examples of waxes include beeswax, candelilla wax, carnauba wax, jojoba oil, lanolin, etc. Examples of higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, arachyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, decyltetradecanol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, and lanolin alcohol.

[0046] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, hydroxystearic acid, 12-hydroxystearic acid, oleic acid, undecylenic acid, linoleic acid, ricinoleic acid, and lanolin fatty acids.

[0047] Examples of alkyl glyceryl ethers include batyl alcohol (monostearyl glyceryl ether), chimyl alcohol (monocetyl glyceryl ether), selachyl alcohol (monooleyl glyceryl ether), and isostearyl glyceryl ether.

[0048] Examples of esters include any monocarboxylic acid esters, dicarboxylic acid monoesters, and dicarboxylic acid diesters other than component (B). Examples include various monoesters of dicarboxylic acids such as oxalic acid, succinic acid, sebacic acid, and adipic acid. Other examples include various esters of monocarboxylic acids such as lactic acid, acetic acid, stearic acid, myristic acid, ricinoleic acid, octanoic acid, and isooctanoic acid.

[0049] (surfactant) The surfactant may be a cationic surfactant or a nonionic surfactant other than the components (B) and (C).

[0050] Examples of cationic surfactants include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, behenyltrimethylammonium methylsulfate, tri(polyoxyethylene)stearylammonium chloride, Quaternium-91 (INCI name), behenyltrimethylammonium chloride, distearyldimethylammonium chloride, lanolin fatty acid amide propylethyldimethylammonium ethyl sulfate, cetyltrimethylammonium bromide, stearyltrimethylammonium bromide, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, and N,N-di(acyloxy)-N-(hydroxyethyl)-N-methylammonium methosulfate.

[0051] Examples of nonionic surfactants include POE alkyl ethers, POE alkyl phenyl ethers, POE-polyoxypropylene alkyl ethers, POE sorbitan fatty acid esters, POE propylene glycol fatty acid esters, aliphatic alkanolamides such as coconut oil fatty acid monoethanolamide, POE alkyl glucoside, and polyoxyalkylene alkyl diethers.

[0052] (polymer material) Examples of polymeric substances include cationic polymers such as polyquaternium-4 and polyquaternium-10 (both INCI names), cationic cellulose, cationic guar gum, cationic starch, quaternized polyvinylpyrrolidone derivatives, and diallyl quaternary ammonium salt polymer derivatives.

[0053] Examples of the polymer include anionic polymers such as carboxyvinyl polymers, amphoteric polymers such as diallyl quaternary ammonium salt / acrylic acid copolymers, and cellulose derivatives such as hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and carboxymethyl cellulose salts.

[0054] (protein hydrolysate) Examples of the protein hydrolysates other than component (A) include proteins such as collagen, keratin derived from sources other than waterfowl feathers, elastin, fibroin, egg, silk, conchiolin, casein, and gelatin, and protein hydrolysates obtained by hydrolyzing proteins obtained from plants such as rice, wheat, barley, oat, soybean, pea, almond, Brazil nut, potato, and corn with acid, alkali, enzyme, etc.

[0055] (pH buffer component) Examples of pH buffer components include volatile alkaline components such as glycolic acid, lactic acid, malic acid, citric acid, tartaric acid, succinic acid, ammonia, and morpholine; alkanolamines such as monoethanolamine and triethanolamine; amino alcohols such as 2-amino-2-methyl-1-propanol and 2-amino-2-methyl-1,3-propanediol; and basic amino acids such as L-arginine, L-lysine, and L-histidine. [Example]

[0056] Examples of the present invention will be described below together with corresponding comparative examples, but the technical scope of the present invention is not limited by these examples and comparative examples.

[0057] [Preparation of Examples and Comparative Examples] Shampoo compositions according to Examples 1 to 23 shown in Tables 1 to 3 at the end of this document and shampoo compositions according to Comparative Examples 1 to 7 shown in Table 4 at the end of this document were prepared according to conventional methods. For the components listed in the "Component Name" column of each table, those that are components (A) to (D) of the present invention are indicated by "(A)" to "(D)" in the left margin.

[0058] In the table, the ingredient labeled "(A) Hydrolyzed Keratin Powder" with its average molecular weight (number average molecular weight by GPC method) is a product manufactured by Toyo Feather Industries Co., Ltd., with an average molecular weight of 750 being "Keratide TK-B" and an average molecular weight of 1440 being "Keratide SH-Q." The ingredient labeled "Hydrolyzed Keratin Powder (Wool)" is a product manufactured by Seiwa Kasei Co., Ltd. under the trade name "Promois WK-HQ." The ingredient labeled "Preservative" is specifically phenoxyethanol.

[0059] In each table, the numerical values ​​indicating the content of each component are expressed in mass %, and the "appropriate amount" of tartaric acid (pH adjuster) or L-arginine (pH adjuster) means the amount appropriate for adjusting the pH value of the shampoo composition of the corresponding Example or Comparative Example to the value shown in the "pH" column. The pH was measured using a 10% aqueous solution of the shampoo composition using a pH-METER F-22 manufactured by HORIBA.

[0060] Although the numerical values ​​of the mass ratio (A) / [(B)+(C)] described in the fourth aspect of the present invention are not shown for the shampoo compositions of Examples 1 to 23 shown in Tables 1 to 3, these values ​​will be listed below along with the notation of each Example. Most of the numerical values ​​are approximate, including rounding.

[0061] (Example 1: 0.031), (Example 2: 0.006), (Example 3: 0.019), (Example 4: 0.06), (Example 5: 0.13), (Example 6: 0.31), (Example 7: 0.63), (Example 8: 0.063), (Example 9: 0.05), (Example 10: 0.042), (Example 11: 0.033), (Example 12: 0.029), (Example 13: 0.023), (Example 14: 0.05), (Example 15: 0.042), (Example 16: 0.036), (Example 17: 0.029), (Example 18: 0.026), (Example 19: 0.031), (Example 20: 0.031), (Example 21: 0.031).

[0062] [Evaluation of Examples and Comparative Examples] (cleanability) Evaluation method Ten panelists used each of the shampoo compositions according to Examples 1 to 23 and Comparative Examples 1 to 7 shown in Tables 1 to 4 on their hair in the usual manner, and evaluated the cleansing properties of each composition using the "refreshing feeling" after use as an indicator.

[0063] Evaluation criteria If 7 or more panelists answered that the cleaning ability was good, the rating was 5, if 6 panelists answered 4, if 5 panelists answered 3, if 2 to 4 panelists answered 2, and if 0 to 1 panelists answered 1. The evaluation results are shown in the "cleanability" column of each table.

[0064] (foam performance) Evaluation method Ten panelists used each of the shampoo compositions according to Examples 1 to 23 and Comparative Examples 1 to 7 shown in Tables 1 to 4 on hair in the usual manner, and evaluated whether the foam performance was good or not, including an overall evaluation of foaming, foam retention, and foam quality.

[0065] Evaluation criteria If 7 or more panelists answered that the foam performance was good, the product was ranked 5, if 6 panelists answered 4, if 5 panelists answered 3, if 2 to 4 panelists answered 2, and if 0 to 1 panelists answered 1. The evaluation results are shown in the "Foam performance" column of each table.

[0066] (Color retention: oxidation dye) Evaluation method Strands of black hair approximately 10 cm in length were prepared, and each strand was bleached twice using the standard method using Hoyu Co., Ltd.'s bleaching agent "Beauteen Base Up Bleach," and then dyed using Hoyu Co., Ltd.'s hair color agent "Promaster R9 / 8" to create test hair strand samples. A test hair bundle sample was washed five times in accordance with a conventional method using the shampoo compositions of Examples 1 to 23 and Comparative Examples 1 to 7 shown in Tables 1 to 4, followed by rinsing with warm water. The hair bundle sample was then subjected to a drying treatment in which it was dried with a hair dryer.

[0067] Evaluation criteria For each of the hair bundle samples according to each Example and Comparative Example, which had been shampooed five times, 10 panelists evaluated whether the color retention was good or not compared to before shampooing. If 7 or more panelists answered "good color retention," the rating was "5," if 6 panelists answered "4," if 5 panelists answered "good color retention," the rating was "3," if 2 to 4 panelists answered "2," and if 0 to 1 panelists answered "1." The results of the evaluation are shown in the "Color retention (oxidation dye)" column in each table.

[0068] (Color retention: hair dye) Evaluation method Strands of black hair approximately 10 cm in length were prepared, and each strand was bleached twice using Hoyu Corporation's bleaching agent "Beauteen Base Up Bleach" in the usual manner. Two test hair strand samples were then created by dyeing each strand using Hoyu Corporation's hair dye "Glamage Hair Manicure Strawberry Red," which contains an acidic dye, and Hoyu Corporation's hair dye "Beauteen Point Color Cream Fire Red," which contains a basic dye. As shown in Table 5, two test hair bundle samples were washed five times using the shampoo compositions of Example 1 and Comparative Example 1 according to a conventional method, followed by rinsing with warm water. The hair bundle samples were then subjected to a drying treatment using a hair dryer.

[0069] Evaluation criteria For each of the two hair bundle samples washed with the shampoo compositions of Example 1 and Comparative Example 1, 10 panelists evaluated whether the color retention was good or not compared to before shampooing. If 7 or more panelists answered "good color retention," the result was ranked "5," if 6 panelists answered "4," if 5 panelists answered "good color retention," the result was ranked "3," if 2 to 4 panelists answered "2," and if 0 to 1 panelists answered "1." The results of the evaluations are shown in the "Color retention (acid dyes)" and "Color retention (basic dyes)" columns of Table 5.

[0070] [Table 1]

[0071] [Table 2]

[0072] [Table 3]

[0073] [Table 4]

[0074] [Table 5] [Industrial Applicability]

[0075] According to the present invention, there is provided a shampoo composition to be used after hair dyeing with an oxidative dye or a direct dye, which effectively prevents the dye from escaping from the hair while maintaining foaming properties and cleansing properties.

Claims

1. A shampoo composition comprising (A) a keratin hydrolysate derived from waterfowl feathers, (B) an amphoteric surfactant, and (C) an anionic surfactant, wherein the content of component (C) is 10% by mass or less when the total amount of the composition is 100% by mass.

2. 2. The shampoo composition according to claim 1, wherein the content of component (C) is 0.1% by mass or more.

3. 3. The shampoo composition according to claim 1, wherein the mass ratio (A) / [(B)+(C)] of the content of the component (A) to the total content of the component (B) and the component (C) is within the range of 0.001 to 1.

5.

4. The shampoo composition according to any one of claims 1 to 3, further comprising (D) taurine.

5. 5. The shampoo composition according to claim 1, which has a pH in the range of 3 to 7.

6. A hair treatment kit comprising an oxidation hair dye composition or a hair dye composition containing a direct dye, and the shampoo composition according to any one of claims 1 to 5.

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