Hair Swelling Agent

Abstract

This invention provides a hair swelling agent that can effectively swell hair while suppressing damage to the hair. [Solution] The hair swelling agent consists of sugars. The sugars may include monosaccharides and sugar alcohols, and may contain two or more types of sugars, and may include mannitol as a sugar alcohol. When there are two or more types of sugars, and at least mannitol is included, and the mannitol content is S (mass%) and the content of sugars other than mannitol is T (mass%), the ratio of these (T / S) can be 100 or less.

Description

[Technical Field]

[0001] This invention relates to a hair swelling agent. More specifically, it relates to a hair swelling agent using sugar. [Background technology]

[0002] Traditionally, the process of swelling hair has been widely used. For example, during hair dyeing, hair is swollen to allow the dye to penetrate the hair shaft. Such hair swelling is disclosed in the following Patent Documents 1 to 5. In addition, techniques using sugar for specific effects on hair are disclosed in Patent Documents 6 to 8. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2008-545624 [Patent Document 2] Japanese Patent Publication No. 2015-511626 [Patent Document 3] Japanese Patent Publication No. 2022-054418 [Patent Document 4] Japanese Patent Publication No. 2024-519822 [Patent Document 5] Japanese Patent Publication No. 2009-084168 [Patent Document 6] Japanese Patent Publication No. 2016-169177 [Patent Document 7] Japanese Patent Publication No. 2020-125263 [Patent Document 8] Japanese Patent Publication No. 2023-143738 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] The above Patent Document 1 contains ammonia (Patent Document 1)

[0005] ) Patent Document 2 describes that urea (Patent Document 2

[0045] ) can be used for hair swelling, and Patent Document 3 describes that monoethanolamine, ammonium bicarbonate, sodium carbonate, and arginine (Patent Document 3

[0033] ) can be used for hair swelling. All of these are alkaline agents that exhibit alkalinity when soluble in water, but these alkaline agents have a strong effect on hair and cause significant damage to the hair. In addition, other components known to have a hair swelling effect include reducing agents having thiol groups, protein denaturants, and sulfites, but these components also cause damage to the hair equivalent to that of the alkaline agents mentioned above. Furthermore, as ingredients that provide a hair swelling effect, Patent Document 4 lists isopropyl alcohol, propylene carbonate, and ethylene carbonate (Patent Document 4

[0156] ), and Patent Document 5 lists lower carbonate, aromatic alcohol, and N-alkylpyrropidone (Patent Document 5

[0017] ). Although these ingredients are different from alkaline agents, they share the commonality of being ingredients that damage hair, even if not as much as alkaline agents, because they dissolve and remove hair-protecting components such as sebum. Thus, since most hair swelling formulations involve damage, there is a need for technology that can swell hair while suppressing damage.

[0005] On the other hand, as a technology that utilizes sugar for the purpose of affecting hair, Patent Document 6 uses sugar to enhance the adhesion of hair cosmetics to the hair and to more effectively impart firmness and body to the hair (Patent Document 6

[0015] ). Furthermore, Patent Document 7 discloses an aqueous hair treatment agent combining fatty acids and mannitol, and states that this combination provides the effect of maintaining smoothness or combability of the hair even under high humidity (Patent Document 7

[0009] ). Furthermore, Patent Document 8 discloses a hair cleansing agent composition that exhibits excellent performance from washing to rinsing and after washing, and contains a predetermined ratio of (A) a carbon-16 internal olefin sulfonate or a salt thereof and (B) a monosaccharide or sugar alcohol (Patent Document 8

[0006] and claim 1). However, there is no description or suggestion regarding the fact that it can be used for the purpose of suppressing damage to hair during action or swelling hair.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide a hair swelling agent capable of effectively swelling hair while suppressing damage to hair. [Means for Solving the Problems]

[0007] While studying an agent that can exhibit a swelling action while suppressing damage to hair, the present inventors found that sugar can exhibit a swelling action on hair. On the other hand, it was found that substantially no damage to hair due to swelling of hair by sugar was recognized. In addition, it was confirmed that the swelling of hair by sugar is sufficient for the active ingredient to penetrate into hair. That is, the inventors found that it exhibits excellent effects as a swelling agent for hair and completed the present invention.

[0008] The present invention includes the following. [1] A hair swelling agent characterized by consisting of sugar. [2] The hair swelling agent according to [1] above, wherein the sugar contains a monosaccharide. [3] The hair swelling agent according to [1] or [2] above, wherein the sugar contains a sugar alcohol. [4] The hair swelling agent according to any one of [1] to [3] above, wherein two or more kinds of the sugars are used. [5] The hair swelling agent according to [3] above, wherein the sugar alcohol contains mannitol. [6] The sugar is two or more kinds, contains at least mannitol, when the content of the mannitol is S (mass %), and the content of the sugar other than the mannitol is T (mass %), the hair swelling agent according to any one of [1] to [5] above, wherein the ratio (T / S) thereof is 80 or less. [Effects of the Invention]

[0009] According to the hair swelling agent of the present invention, while suppressing damage to hair, hair beneficial components can be penetrated into the hair.

Embodiments for Carrying out the Invention

[0010] Hereinafter, the present invention will be described in detail. Unless otherwise specified, “%” means “mass%”, “part” means “part by mass”, and the notation “X to Y” means “X or more and Y or less”. Regarding the names of some compounds, names according to the Cosmetic Ingredients Labeling List of the Japan Cosmetic Industry Federation or names according to INCI (INCI: International Nomenclature of Cosmetic Ingredient) are used. Furthermore, regarding the names of some compounds, for the polyoxyalkylene chain, the polyoxyethylene chain may be abbreviated as “POE” and the polyoxypropylene chain may be abbreviated as “POP”. In addition, the numbers in parentheses following these abbreviations represent the number of additional moles. Furthermore, (meth)acrylic acid represents acrylic acid or methacrylic acid.

[0011] [1] Hair swelling agent The hair swelling agent of the present invention is characterized by consisting of sugar.

[0012] As described above, the present inventors have found that sugar exhibits a swelling action on hair. A hair swelling agent means an agent that can increase the hair diameter after the action compared to the hair diameter before the action. Specifically, it is an agent having a swelling action higher than the hair swelling action by water. The type of sugar used as this hair swelling agent is not limited. For example, monosaccharides, disaccharides, trisaccharides, tetrasaccharides, oligosaccharides, polysaccharides, sugar alcohols, etc. can be used. These may be used alone or in combination of two or more.

[0013] Among the above, monosaccharides include trisaccharides such as glyceraldehyde; tetrasaccharides such as erythrulose and erythrose; pentoses such as ketotriose, ribulose, xylulose, ribose, arabinose, xylose, lyxose, and deoxyribose; hexoses such as glucose, mannose, galactose, fructose, sorbose, allose, altrose, gross, idose, talose, fucose, fuucrose, rhamnose, psicose, and tagatose; and heptasaccharides such as mannoheptulose and sedoheptulose. These may be used individually or in combination of two or more. Among these, tetrasaccharides, pentoses, and hexoses are preferred from the viewpoint of their swelling effect on hair, and hexoses are even more preferred.

[0014] Among the disaccharides mentioned above, examples include sucrose, lactulose, maltose, trehalose, cellobiose, isomaltose, genthiobiose, and isomaltulose. These may be used individually or in combination of two or more. Among the above, examples of trisaccharides include maltotriose, melegitose, and raffinose. These may be used individually or in combination of two or more. Among the above, stachyose is an example of a tetrasaccharide. These can be used individually or in combination of two or more.

[0015] Among the above, examples of oligosaccharides include fructooligosaccharides, galactooligosaccharides, mannan-oligosaccharides, lactulose-fructose oligosaccharides, isomaltoligosaccharides, xylooligosaccharides, soybean oligosaccharides, and nigero-oligosaccharides. These may be used individually or in combination of two or more. Among the above, examples of polysaccharides include starch, amylose, amylopectin, glycogen, dextrin, cellulose (crystalline cellulose, carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxypropylcellulose, etc.), curdlan, paramylon, chitin, dextran, carrageenan, heparin, alginic acid, hyaluronic acid, pectin, xylan, glucomannan, levan, glucan, and fructan. These may be used individually or in combination of two or more.

[0016] Among the above, examples of sugar alcohols include monosaccharide alcohols such as mannitol, sorbitol, xylitol, erythritol, treitol, isomalt, arabinitol, ribitol, iditol, galactitol, boremitol, perseitol, glycerol, allitol, and talitol; and disaccharide alcohols such as maltitol and lactitol. These may be used individually or in combination of two or more. Among these, sorbitol, mannitol, maltitol, erythritol, xylitol, and lactitol are preferred from the viewpoint of their swelling effect on hair, and sorbitol, mannitol, maltitol, and erythritol are even more preferred.

[0017] Furthermore, derivatives of the sugar alcohols mentioned above, as well as their salts, can also be used as sugar alcohols. Of these, derivatives of sugar alcohols refer to sugar alcohols that have undergone structural changes, and specifically include compounds in which at least one of the substituents (e.g., hydroxyl groups) of the sugar alcohol is replaced with another substituent. Examples of other substituents include hydrogen atoms, halogen atoms, alkyl groups, alkenyl groups, alkynyl groups, aryl groups, amino groups, and cyano groups. These may be used individually or in combination of two or more. Furthermore, examples of cations constituting salts of sugar alcohols and / or derivatives of sugar alcohols include alkali metal ions such as Na, K, and Li, and ammonium ions (-NH3). These may be used individually or in combination of two or more.

[0018] Among the various sugars mentioned above, monosaccharides and / or sugar alcohols are preferred from the viewpoint of their swelling effect on hair. Furthermore, the inclusion of sugar alcohols is preferable from the viewpoint of obtaining a stronger effect in improving hair manageability and hair smoothness. Furthermore, when using monosaccharides, among the monosaccharides mentioned above, tetrasaccharides, pentoses, and hexoses are preferred, and hexoses are even more preferred. Furthermore, when using sugar alcohols, among the sugar alcohols mentioned above, sorbitol, mannitol, maltitol, erythritol, xylitol, and lactitol are preferred, and sorbitol, mannitol, maltitol, and erythritol are even more preferred.

[0019] While sugars may be used individually, it is preferable to use two or more sugars in combination from the viewpoint of their swelling effect on hair. Specifically, examples include combinations of sorbitol and mannitol, sorbitol and maltitol, sorbitol and erythritol, mannitol and maltitol, mannitol and erythritol, and maltitol and erythritol. These may be used individually or in combination of two or more sugars. Among these, the sugar is preferably a combination of two or more sugars including mannitol. For example, this could be a combination of sorbitol and mannitol, a combination of mannitol and maltitol, or a combination of mannitol and erythritol.

[0020] When a product contains two or more sugars, including mannitol, if the mannitol content is denoted as S (mass%) and the content of sugars other than mannitol is denoted as T (mass%), the ratio of these (T / S) is preferably 80 or less from the viewpoint of its swelling effect on hair. This ratio (T / S) can be further set to 75 or less, 70 or less, 60 or less, 50 or less, 40 or less, 30 or less, 20 or less, 15 or less, and 10 or less. On the other hand, its lower limit is not limited, but is usually 0.01 or higher, can be 0.03 or higher, and can be further set to 0.05 or higher, 0.07 or higher, 0.15 or higher, 0.5 or higher, 1 or higher, 2 or higher, 3 or higher, 4 or higher, and 5 or higher. The above upper and lower limits can be any combination of each other. Therefore, for example, it can be 0.01~75, 0.03~70, 0.05~60, 0.07~50, 0.15~40, 0.50~30, 1~20, 2~15, 3~15, 4~10, 5~10, etc.

[0021] Among the above combinations, the combination of sorbitol and mannitol is particularly preferable from the viewpoint of swelling effect on hair. Although sorbitol and mannitol, among sugars, exhibit a swelling effect on hair when used individually, a better synergistic effect can be obtained when sorbitol and mannitol are used in combination compared to when they are used individually. Furthermore, when used in combination, sorbitol is thought to contribute more significantly to the effect of improving hair manageability, and mannitol is thought to contribute more significantly to the effect of improving hair smoothness. In addition, the combination of sorbitol and mannitol is also superior in that it improves formulation stability.

[0022] The hair swelling agent of the present invention can be used together with other components other than sugar. In the present invention, "together" means applying the hair swelling agent and the other component to the hair simultaneously, applying the hair swelling agent to the hair first and then applying the other component to the swollen hair, and applying the other component to the hair first and then applying the hair swelling agent to the hair to which the other component has been applied. These can be done using only one type or using two or more types in combination.

[0023] Other ingredients are not limited to those mentioned above, but examples include ingredients that exert an effect on the hair by penetrating it. When other ingredients are used together with the hair swelling agent of the present invention, the penetration of the other ingredients is improved by the swelling of the hair, thereby enhancing the effects obtained by the other ingredients. Examples of other ingredients include hair repair ingredients (ingredients that repair hair), color fading inhibitors (ingredients that inhibit the fading of dyed hair), hair protection ingredients (ingredients that protect hair), and hair texture improving ingredients (ingredients that improve the texture of hair). These may be used individually or in combination of two or more.

[0024] Of the above, hair repair ingredients are ingredients that provide a repairing effect to hair. Repairing effects include improving hair shine, improving hair strength, improving the smoothness of the hair surface, improving the manageability of the hair, preventing protein loss from the hair, reducing hair frizz, improving hair elasticity and resilience, and improving hair manageability. These may be used individually or in combination of two or more. Examples of hair repair ingredients include peptides, amino acids and their derivatives, vitamins and their derivatives, plant extracts, and polyphenols. These may be used individually or in combination of two or more.

[0025] Of the above, peptides are compounds having a structure in which multiple amino acids are linked together via peptide bonds. In other words, peptides are compounds having a structure composed of multiple amino acid residues. The amino acid residues that make up a peptide are structures that correspond to one unit of the amino acids that make up the peptide, and their types are not limited, and include α-amino acid residues, β-amino acid residues, γ-amino acid residues, and δ-amino acid residues. These amino acid residues may be natural or unnatural, and furthermore, if they are optically active, they may be L-isomers or D-isomers.

[0026] The origin of the peptide is not limited; it can be any peptide, but for example, it can be obtained by hydrolyzing a protein. That is, it can be obtained as a protein hydrolysate or as part thereof. Protein hydrolysates (also called "hydrolyzed proteins") are obtained by hydrolyzing proteins, and therefore usually exist as a mixture of various peptides and proteins. Protein hydrolysates can be used as a mixture without isolating the required peptide, or the required peptide can be isolated (i.e., purified) from the protein hydrolysate and used. The method of peptide isolation is not limited; for example, purification by gel filtration, purification by molecular membrane, etc., can be used. One of these methods may be used alone, or two or more may be used in combination.

[0027] The types of proteins are not limited and include animal proteins, plant proteins, chemically synthesized proteins obtained through chemical synthesis, their hydrolysates (hydrolyzed proteins), cationized hydrolyzed proteins, anionized hydrolyzed proteins, etc. These may be used individually or in combination of two or more.

[0028] Examples of animal proteins include keratin, collagen, silk, conchiolin, elastin, fibroin, casein, and gelatin. These may be used individually or in combination of two or more.

[0029] Examples of plant-based proteins include those obtained from plants such as soybeans, wheat, barley, oats, almonds (including almond seeds, etc.), corn, rice (including rice germ, rice bran, etc.), and potatoes. These may be used individually or in combination of two or more.

[0030] Hydrolyzed proteins include those obtained by hydrolyzing the various proteins mentioned above with acids, alkalis, enzymes, etc. Examples include hydrolyzed collagen, hydrolyzed silk, hydrolyzed keratin, hydrolyzed casein, hydrolyzed conchiolin, and hydrolyzed soy protein. These may be used individually or in combination of two or more. Among these, at least one of hydrolyzed collagen, hydrolyzed silk, and hydrolyzed keratin is preferred from the viewpoint of repair effect.

[0031] Cationic hydrolyzed proteins include components obtained by cationizing hydrolyzed proteins with a denaturing agent, and components obtained by hydrolyzing pre-denatured cationized proteins. Examples of cationized hydrolyzed proteins include N-[2-hydroxy-3-(trimethylammonio)propyl]hydrolyzed keratin chloride, N-[2-hydroxy-3-(trimethylammonio)propyl]hydrolyzed collagen chloride, N-[2-hydroxy-3-(trimethylammonio)propyl]hydrolyzed silk chloride, N-[2-hydroxy-3-(trimethylammonio)propyl]hydrolyzed conchiolin chloride, N-[2-hydroxy-3-(stearyldimethylammonio)propyl]hydrolyzed keratin chloride, N-[2-hydroxy-3-(stearyldimethylammonio)propyl]hydrolyzed collagen chloride, N-[2-hydroxy-3-(stearyldimethylammonio)propyl]hydrolyzed silk chloride, N-[2-hydroxy-3-(stearyldimethylammonio)propyl]hydrolyzed conchiolin chloride, and N-[2-hydroxy-3-(lauryldimethylammonio)propyl Examples include N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed keratin, N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed collagen, N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed silk, N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed conchiolin, N-[2-hydroxy-3-(coconut oil alkyldimethylammonio)propyl] hydrolyzed soy protein, N-[2-hydroxy-3-(coconut oil alkyldimethylammonio)propyl] hydrolyzed collagen, N-[2-hydroxy-3-(coconut oil alkyldimethylammonio)propyl] hydrolyzed silk, N-[2-hydroxy-3-(coconut oil alkyldimethylammonio)propyl] hydrolyzed keratin, and N-[2-hydroxy-3-(coconut oil alkyldimethylammonio)propyl] hydrolyzed conchiolin. These may be used individually or in combination of two or more.

[0032] Furthermore, examples of the chemical modification components of the peptides mentioned above include peptide-based surfactants (ppt-based surfactants) such as cocoyl hydrolyzed collagen K, cocoyl hydrolyzed silk sodium, cocoyl hydrolyzed keratin K, lauroyl hydrolyzed silk sodium, and lauroyl silk amino acid sodium. These may be used individually or in combination of two or more.

[0033] Among the various peptides mentioned above, in the present invention, at least one of hydrolyzed collagen, hydrolyzed silk, hydrolyzed keratin, and hydrolyzed casein is preferred.

[0034] While the molecular weight of the peptide is not limited, from the viewpoint of penetration into hair, peptides with a mass-average molecular weight of 10,000 or less are preferred. The upper limit of the mass-average molecular weight of the peptide can be further set to 5,000 or less, 3,000 or less, and 1,000 or less. On the other hand, while the lower limit of the mass-average molecular weight of the peptide is not limited, from the viewpoint of repair effect and sustainability, it can be set to 100 or more, 200 or more, 250 or more, and 300 or more. The above upper and lower limits can be any combination. Therefore, the mass-average molecular weight of the peptide can be, for example, 100 to 10,000, 200 to 5,000, 250 to 3,000, 300 to 5,000, and 300 to 3,000. Furthermore, the mass-average molecular weight of the peptide is measured by gel permeation chromatography (GPC) using polyethylene glycol as the standard substance.

[0035] Of the above, dyes are components that contribute to hair coloring, and conventionally known dyes can be used. Specifically, these include oxidation dyes and direct dyes. These may be used individually or in combination of two or more. Of the above, the oxidation dye consists of at least one dye intermediate from among the dye intermediate and coupler. The dye intermediate is a component that develops color through oxidative polymerization in the presence of an oxidizing agent. The coupler is a component that develops color through oxidative polymerization together with the dye intermediate in the presence of an oxidizing agent.

[0036] Examples of dye intermediates include p-phenylenediamine, toluene-2,5-diamine (p-toluylenediamine), 2,2'-[(4-aminophenyl)imino]bisethanol, N-phenyl-p-phenylenediamine, 4,4'-diaminodiphenylamine, 2-hydroxyethyl-p-phenylenediamine, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, o-chlor-p-phenylenediamine, 4-amino-m-cresol, 2-amino-4-hydroxyethylaminoanisole, 2,4-diaminophenol, 1,2,4-trihydroxybenzene, o-aminophenol, p-aminophenol, and p-methylaminophenol. Furthermore, the dye intermediates include salts of the above compounds. These salts include acid addition salts. Examples of acid addition salts include hydrochloride salts, sulfate salts of inorganic acids, and acetate salts of organic acids. Only one dye intermediate may be used, or two or more may be used in combination.

[0037] Examples of couplers include 2,4-diaminophenoxyethanol, α-naphthol, 2,6-diaminopyridine, 5-amino-o-cresol, 5-(2-hydroxyethylamino)-2-methylphenol, resorcinol, catechol, pyrogallol, phloroglucin, gallic acid, hydroquinone, m-phenylenediamine, toluene-3,4-diamine, diphenylamine, 3,3'-iminodiphenyl, 1,5-dihydroxynaphthalene, tannic acid, o-aminophenol, m-aminophenol, p-aminophenol, and p-methylaminophenol. Furthermore, the couplers include salts of the above compounds. These salts include acid addition salts. Examples of acid addition salts include addition salts of inorganic acids such as hydrochloride and sulfate, and addition salts of organic acids such as acetate. Only one type of coupler may be used, or two or more types may be used in combination.

[0038] Of the above, o-aminophenol, p-aminophenol, and p-methylaminophenol can be used as both dye intermediates and couplers. For example, when these compounds are used as dye intermediates, other compounds exemplified as couplers can be used in combination. Similarly, when these compounds are used as couplers, other compounds exemplified as dye intermediates can be used in combination.

[0039] Examples of direct dyes among those mentioned above include ionic direct dyes and nonionic direct dyes. These may be used individually or in combination of two or more. Examples of ionic direct dyes include acid dyes and basic dyes. These may be used individually or in combination of two or more. Examples of nonionic direct dyes include HC dyes and disperse dyes. Direct dyes may be used individually or in combination of two or more.

[0040] Examples of acid dyes include Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 106, Red No. 201, Red No. 203, Red No. 220, Red No. 227, Red No. 230 (1), Red No. 504, Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Yellow No. 205, Orange No. 207, Orange No. 402, Green No. 3, Green No. 204, Green No. 401, Blue No. 1, Blue No. 2, Blue No. 202, Blue No. 204, Blue No. 404, Purple No. 401, Brown No. 201, Black No. 401, etc. Acid dyes may be used individually or in combination of two or more.

[0041] Examples of basic dyes include basic red dye, basic orange dye, basic yellow dye, basic green dye, basic blue dye, basic purple dye, and basic brown dye. A single basic dye may be used, or two or more may be used in combination. Examples of basic red dyes include basic red 1, basic red 2, basic red 22, basic red 46, basic red 51, basic red 76, and basic red 118. Examples of basic orange dyes include basic orange 1, basic orange 2, and basic orange 31. Examples of basic yellow dyes include basic yellow 11, basic yellow 28, basic yellow 40, basic yellow 57, and basic yellow 87. Examples of basic green dyes include basic green 1 and basic green 4. Examples of basic blue dyes include basic blue 3, basic blue 6, basic blue 7, basic blue 9, basic blue 26, basic blue 41, basic blue 47, basic blue 75, basic blue 77, basic blue 99, and basic blue 124. Examples of basic purple dyes include basic purple 1, basic purple 2, basic purple 3, basic purple 4, basic purple 14, and basic purple 16. Examples of basic tea dyes include basic tea 4, basic tea 16, and basic tea 17. These may be used individually or in combination of two or more.

[0042] Examples of HC dyes include HC red dye, HC orange dye, HC yellow dye, HC blue dye, and HC purple dye. HC dyes may be used individually or in combination of two or more. Examples of HC red dyes include HC Red 1, HC Red 3, HC Red 7, HC Red 10, HC Red 11, HC Red 13, HC Red 14, HC Red 17, HC Red 18, HC Red 19, HC Red 20, and HC Red 21. One type of HC red dye may be used, or two or more types may be used in combination. Examples of HC orange dyes include HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 6, and HC Orange 7. One type of HC orange dye may be used, or two or more types may be used in combination. Examples of HC yellow dyes include HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 7, HC Yellow 9, HC Yellow 11, HC Yellow 13, HC Yellow 16, HC Yellow 18, HC Yellow 6, HC Yellow 10, HC Yellow 12, HC Yellow 14, HC Yellow 15, and HC Yellow 19. One type of HC yellow dye may be used, or two or more types may be used in combination. Examples of HC blue dyes include HC Blue 2, HC Blue 5, HC Blue 6, HC Blue 8, HC Blue 9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Blue 14, HC Blue 15, HC Blue 16, HC Blue 18, HC Blue 19, and HC Blue 20. One type of HC blue dye may be used, or two or more types may be used in combination. Examples of HC purple dyes include HC Purple 1, HC Purple 2, HC Purple 3, and HC Purple 4. These may be used individually or in combination of two or more. HC purple dyes may be used individually or in combination of two or more.

[0043] In this specification, dyes whose names consist of "HC," "color name," and "number" in that order are referred to as HC dyes. For example, 2,2'-[(4-amino-3-nitrophenyl)imino]bisethanol hydrochloride (CAS RN: 94158-13-1) is included in the definition of HC dyes in this specification because its dye name is HC Red 13, which combines "HC," "color name (in this case, red)," and "number (in this case, 13)."

[0044] Examples of disperse dyes include Disperse Black 9, Disperse Blue 1, Disperse Blue 3, Disperse Blue 7, Disperse Brown 4, Disperse Orange 3, Disperse Red 11, Disperse Red 15, Disperse Red 17, Disperse Violet 1, Disperse Violet 4, and Disperse Violet 15. Disperse dyes may be used individually or in combination of two or more.

[0045] Other examples include nitro dyes such as 4-nitro-o-phenylenediamine, 2-nitro-p-phenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, picramic acid, picric acid and their salts, carotenoid pigments, anthraquinone pigments, flavonoid pigments (anthocyanin pigments, chalcone pigments, flavone pigments), porphyrin pigments, diketone pigments, betacyanin pigments, and azophyllon pigments. Specifically, examples of natural dyes include madder pigment, extracted carotene, cochineal pigment, lac pigment, red cabbage pigment, perilla pigment, purple corn pigment, elderberry pigment, boysenberry pigment, grape skin pigment, grape juice pigment, purple sweet potato pigment, safflower yellow pigment, safflower red pigment, sorghum pigment, onion pigment, cocoa pigment, sandalwood pigment, spirulina blue pigment, fluorophyllophyllum, bee red, red yeast rice pigment, indigo, gardenia pigment, turmeric pigment, annatto pigment, copper chlorophyllin sodium, paprika pigment, lac pigment, henna, rutin, and safflower red. These can be used individually or in combination of two or more.

[0046] Among the above, hair-protecting ingredients include glycyrrhizic acid, glycyrrhetinic acid, salicylic acid, and their derivatives, as well as their salts. These may be used individually or in combination of two or more. Among these, the use of glycyrrhizic acid and / or its salts is preferred. Examples of cations constituting glycyrrhizinate include alkali metal ions such as K and Na, and ammonium ions (-NH3). These may be used individually or in combination of two or more. Among these, dipotassium glycyrrhizinate (glycyrrhizinate K2) is particularly preferred.

[0047] Among the above, amino acids (amino acids, amino acid derivatives, and their salts) and amino acid-like components can be used as hair texture improving components. These may be used individually or in combination of two or more. Examples of such components include taurine, glycine, betaine, alanine, leucine, serine, threonine, cysteine, cystine, methionine, ornithine, lysine, arginine, aspartic acid, asparagine, glutamic acid, glutamine, tyrosine, phenylglycine, and tryptophan. These may be used individually or in combination of two or more.

[0048] Furthermore, although the hair swelling agent of the present invention consists of sugar, a hair treatment agent can be obtained by incorporating the hair swelling agent of the present invention. That is, a hair treatment agent can be made characterized by containing sugar as a hair swelling component. In this case, the aforementioned hair repair components, dyes, hair protection components, hair texture improving components, etc., can be incorporated into the hair treatment agent as needed.

[0049] The amount of hair swelling agent (sugar) contained in a hair treatment agent is not limited, but the lower limit can be 50% by mass or more, further 55% by mass or more, further 60% by mass or more, further 65% by mass or more, further 70% by mass or more, and further 75% by mass or more. On the other hand, the upper limit for the amount of hair swelling agent (sugar) contained in a hair treatment agent can be 99.9% by mass or less, further 95% by mass or less, further 94% by mass or less, further 93% by mass or less, further 92% by mass or less, further 91% by mass or less, and further 90% by mass or less. The upper and lower limits mentioned above can be any combination of them. For example, they can be 50-99.9% by mass, 55-95% by mass, 60-94% by mass, 65-93% by mass, 70-92% by mass, 75-91% by mass, and 75-90% by mass. As will be described later, the formulation of the hair swelling agent is not limited, but it can be in solid form, and similarly, the formulation of the hair treatment agent is not limited, but it can be in solid form. The above content is particularly suitable when the formulation of the hair treatment agent is in solid form.

[0050] When a hair treatment agent contains a hair swelling agent made of sugar and other components, it is preferable that the total content of the hair swelling agent and other components be 50% by mass or more, when the total content of the hair treatment agent is considered as 100% by mass. By having 50% by mass or more, the hair swelling effect can be exerted more effectively compared to when it is less than 50% by mass, while the effects of the other components on the hair can be effectively exerted. The lower limit of the total content of hair swelling agents and other components can be further set to 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, 75% by mass or more, and 80% by mass or more. On the other hand, the upper limit of the total content of hair swelling agents and other components can be set to 99.9% by mass or less, 95% by mass or less, 94% by mass or less, 93% by mass or less, 92% by mass or less, 91% by mass or less, and 90% by mass or less, from the viewpoint of more effectively exerting the hair swelling effect while effectively exerting the effects of the other components on the hair. The upper and lower limits mentioned above can be any combination of each other. For example, they can be 50-99.9% by mass, 55-95% by mass, 60-94% by mass, 65-93% by mass, 70-92% by mass, 75-91% by mass, and 80-90% by mass. Furthermore, similar to the explanation of the amount of hair swelling agent contained in the hair treatment agent described above, the total amount of the hair swelling agent and other ingredients is particularly suitable when the hair treatment agent is in solid form.

[0051] Furthermore, while the hair swelling agent and other ingredients may be included in the hair treatment agent in any quantity ratio, the amount of the hair swelling agent relative to the total amount of the hair treatment agent (amount of hair swelling agent / total amount of hair treatment agent) should be M A (As a percentage by mass), the content of other ingredients relative to the total hair treatment agent (mass of other ingredients / total mass of hair treatment agent) is M B (Assuming mass %), M A / M B From the viewpoint of achieving both hair swelling and the effects of other components on the swollen hair, it is preferable that the amount of hair swelling agent be equal to or greater than that of the other components. A / M B The lower limit of is further M A / M B > 1 is preferred, and M A / M B ≧2 is more preferred, and M A / M B ≧5 is even more preferred. Also, from the perspective of the hair swelling effect, M A / M B ≧6.5 is preferred, and M A / M B ≧8.0 is more preferred. In particular, M A / M B ≧9.0 can be achieved. On the other hand, the upper limit of M A / M B is not limited, but usually, M A / M B <50, and M A / M B ≦30 is preferred, and M A / M B ≦25 is more preferred, and M A / M B ≦22 is even more preferred, and M A / M B ≦18 is particularly preferred. In particular, M A / M B ≦15 can be achieved. The above upper and lower limits can be combined in various ways. Therefore, for example, 1 <M A / M B <50 can be achieved, and further 2 ≦ M A / M B ≦30 can be achieved, and further 5 ≦ M A / M B ≦25 can be achieved, and further 6.5 ≦ M A / M B ≦22 can be achieved, and further 8.0 ≦ M A / M B ≦18 can be achieved, and further 9.0 ≦ M A / M B ≦15 can be achieved.

[0052] Hair treatment agents may contain, in addition to the above, other ingredients such as bulking agents, stabilizers, antioxidants, preservatives, plant extracts, vitamins, fragrances, colorants, and UV absorbers. These may be used individually or in combination of two or more. Furthermore, they may contain at least one ingredient selected from those listed in the "Standards for Ingredients of Quasi-Drugs" (published June 2006, Yakuji Nippo Co., Ltd.). These may be used individually or in combination of two or more.

[0053] Examples of bulking agents include gelatin, polyvinylpyrrolidone, and salts (sulfates, citrates, stearic acid, phosphates, silicates, carbonates, etc.). These may be used individually or in combination of two or more.

[0054] Examples of stabilizers include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbiturates, uric acid, and tannic acid. These may be used individually or in combination of two or more.

[0055] Examples of antioxidants include ascorbic acid (L-ascorbic acid) and anhydrous sodium sulfite. These may be used individually or in combination of two or more.

[0056] Examples of preservatives include phenoxyethanol, methylparaben, ethylparaben, propylparaben, isopropylparaben, butylparaben, isobutylparaben, and sodium benzoate. These may be used individually or in combination of two or more.

[0057] The plant extracts include avocado extract, hydrangea extract, aloe extract, apricot extract, apricot kernel extract, ginkgo extract, fennel extract, turmeric extract, scutellaria extract, phellodendron bark extract, St. John's wort extract, orange extract, seaweed extract, chamomile extract, chamomile extract, licorice extract, gardenia extract, bamboo grass extract, grapefruit extract, mulberry extract, cranberry extract, burdock extract, bamboo grass extract, hawthorn extract, sansho pepper extract, mallow extract, rehmannia extract, perilla extract, linden extract, peony extract, ginger extract, and Examples include birch extract, horsetail extract, sage extract, hawthorn extract, thyme extract, tea extract, clove extract, houttuynia cordata extract, hibiscus extract, witch hazel extract, parsley extract, loquat extract, loofah extract, safflower extract, peppermint extract, linden extract, hop extract, pine extract, horse chestnut extract, soapberry extract, eucalyptus extract, yuzu extract, coix seed extract, mugwort extract, lychee extract, lavender extract, apple extract, lemon extract, astragalus extract, rose extract, rosemary extract, and Roman chamomile extract. These can be used individually or in combination of two or more.

[0058] Furthermore, the other components may themselves be in solid form (powder, granules, lump, molded body, tablet, etc.) or liquid form. Similarly, the other components may be included in the hair treatment in any way, for example, in solid form (powder, granules, lump, molded body, tablet, etc.) or in liquid form (dissolved in a solvent, etc.). When the other components are in solid form, the penetration of the other components can usually be promoted by applying a composition in which the other components are dispersed or dissolved in a liquid in which sugar is dissolved to the hair. That is, by applying a liquid containing sugar and other components to the hair, the swelling effect of the sugar on the hair can be more effectively exerted, and the penetration of the other components into the swollen hair can be promoted.

[0059] The dosage form (dosage form at 25°C) of the hair swelling agent of the present invention is not limited and may be solid or liquid. Of these, from the viewpoint of preservation, a solid state (at room temperature (25°C)) is preferred. Examples of solid states include powder, granules, lumps, molded bodies, tablets, etc. Furthermore, these states may be present individually or in a mixture thereof. Similarly, the formulation of the hair treatment agent mentioned above (form at 25°C) is not limited and may be solid or liquid. Of these, from the viewpoint of preservation, a solid state (at room temperature (25°C)) is preferred. Examples of solid states include powder, granules, lumps, molded bodies, tablets, etc. Furthermore, these states may be present individually or in a mixture thereof. The method of using the hair swelling agent of the present invention will be described later.

[0060] If the hair swelling agent of the present invention is in solid form, it can be made easier to apply to hair by dissolving it separately in a solubilizer or the like. In other words, its properties can be changed to a liquid or the like. Examples of solubilizing agents include water, alcohol, and ether. These may be used individually or in combination of two or more. When using alcohol, examples of alcohols include monohydric alcohols, polyhydric alcohols, and ether alcohols. These may be used individually or in combination of two or more. Examples of monohydric alcohols include aliphatic alcohols with 5 or fewer carbon atoms, such as ethanol, n-propanol, and isopropanol; and aromatic alcohols, such as benzyl alcohol, 2-phenylethyl alcohol, phenylpropanol, and phenyl glycol. These may be used individually or in combination of two or more.

[0061] Preferably, the polyhydric alcohol is a dihydric to hexahydric alcohol, and preferably a polyhydric alcohol with 2 to 6 carbon atoms. Specifically, examples include alkanediols, alkanetriols, and oxydialkanols. Among these, examples of alkanediols include ethanediol, propanediol, butanediol, and pentanediol. Furthermore, examples of ethanediols include ethylene glycol. Examples of propanediols include propane-1,2-diol (propylene glycol) and trimethylene glycol. Examples of pentanediols include isopentyldiol. Furthermore, examples of alkanetriols include glycerin, butanetriol, pentanetriol, and 1,3-butylene glycol (BG). Furthermore, examples of oxydialkanols include oxydiethanol and oxydipropanol. Other examples include dipropylene glycol (DPG). These may be used individually or in combination of two or more. Examples of ether alcohols include ethoxydiglycol, methoxydiglycol, and diethylene glycol monobutyl ether. These may be used individually or in combination of two or more.

[0062] The hair swelling agent of the present invention is intended to swell hair and may be used alone or in combination with other agents, as described above. Among the embodiments of using this product alone, one example is using a hair swelling agent in combination with a hair repair agent for the purpose of repairing hair. Another example is using a hair swelling agent in combination with a dye for the purpose of preventing fading, touching up, etc.

[0063] Furthermore, when hair swelling agents are used in combination with other agents, they can be used as pre-treatment agents, post-treatment agents, or mixtures when dyeing, bleaching, and / or changing the shape of hair. These may be used individually or in combination of two or more agents. In other words, as a pre-treatment agent, one embodiment is to apply the hair swelling agent of the present invention to the hair before applying these formulations to the hair, for the purpose of suppressing hair damage caused by dyeing, bleaching, and / or changing the shape of the hair. Furthermore, as a post-treatment agent, one embodiment involves applying the hair swelling agent of the present invention after applying these formulations to the hair, for the purpose of repairing hair damage caused by dyeing, bleaching, and / or changing the shape of the hair. Furthermore, as a mixed agent, it can be used in combination with hair dyes, bleaching agents, shape-changing agents, etc., for the purpose of suppressing hair damage associated with dyeing, bleaching, and / or changing the shape of the hair.

[0064] Furthermore, when the hair swelling agent of the present invention is used in combination with other agents, examples of other agents include treatments, system treatments, hair coloring compositions (oxidative hair dyes, color treatments, color shampoos, hair manicures, etc.), hair bleaching compositions (bleaching agents, etc.), and hair shape changing compositions (perming agents, hair straightening agents, curling agents, styling agents, etc.).

[0065] [2] How to use hair swelling agent The method of using the hair swelling agent of the present invention is characterized by comprising a dissolution step of dissolving the aforementioned hair swelling agent in a solubilizing agent.

[0066] As mentioned above, preferred embodiments of the hair swelling agent of the present invention include solid form (powder, granules, lump, molded body, tablet, etc.). While solid hair swelling agents can be used as is, it is preferable to dissolve them in a solubilizer before use. Dissolution makes the hair swelling agent liquid, making it easier to apply to hair compared to using it in powder form. In other words, it improves applicability and ease of spreading. Furthermore, making it liquid allows for more even adhesion to the hair.

[0067] The dissolution step is the step of dissolving the hair swelling agent in a solubilizer. In the method of using the hair swelling agent of the present invention, for example, (1) a solubilizer specifically for dissolving the hair swelling agent can be used. Alternatively, (2) a solubilizer contained in other liquid formulations can also be used. That is, (1) the hair swelling agent of the present invention can be dissolved in a dedicated solubilizer (a solubilizer intended to dissolve the hair swelling agent of the present invention, which substantially does not contain other target components) to make a liquid hair swelling agent. Furthermore, (2) the hair swelling agent of the present invention can be dissolved in a solubilizer contained in another liquid formulation (a solubilizer constituting another formulation such as an oxidative hair dye, a bleaching agent, or another hair swelling agent) to obtain another liquid formulation containing the hair swelling agent of the present invention. That is, an oxidative hair dye containing the hair swelling agent of the present invention, a bleaching agent containing the hair swelling agent of the present invention, a treatment agent containing the hair swelling agent of the present invention, etc. Furthermore, (3) the hair swelling agent of the present invention can be dissolved in a dedicated solubilizer to obtain a liquid hair swelling agent, which can then be mixed with other formulations to be used as a liquid formulation overall.

[0068] Examples of solubilators include water, alcohol, and ether. These may be used individually or in combination of two or more. When using alcohol, examples of alcohols include monohydric alcohols, polyhydric alcohols, and ether alcohols. These may be used individually or in combination of two or more. Examples of monohydric alcohols include aliphatic alcohols with 5 or fewer carbon atoms, such as ethanol, n-propanol, and isopropanol; and aromatic alcohols, such as benzyl alcohol, 2-phenylethyl alcohol, phenylpropanol, and phenyl glycol. These may be used individually or in combination of two or more.

[0069] Preferably, the polyhydric alcohol is a dihydric to hexahydric alcohol, and preferably a polyhydric alcohol with 2 to 6 carbon atoms. Specifically, examples include alkanediols, alkanetriols, and oxydialkanols. Among these, examples of alkanediols include ethanediol, propanediol, butanediol, and pentanediol. Furthermore, examples of ethanediols include ethylene glycol. Examples of propanediols include propane-1,2-diol (propylene glycol) and trimethylene glycol. Examples of pentanediols include isopentyldiol. Furthermore, examples of alkanetriols include glycerin, butanetriol, pentanetriol, and 1,3-butylene glycol (BG). Furthermore, examples of oxydialkanols include oxydiethanol and oxydipropanol. Other examples include dipropylene glycol (DPG). These may be used individually or in combination of two or more. Examples of ether alcohols include ethoxydiglycol, methoxydiglycol, and diethylene glycol monobutyl ether. These may be used individually or in combination of two or more.

[0070] As described above, the method of using the hair swelling agent of the present invention may include steps other than the dissolution step. Other steps include an application step in which the liquid hair swelling agent obtained through the dissolution step is applied to the hair. The application method in the application process is not limited, and various known application methods can be used. For example, (1) the liquid hair swelling agent can be applied to the hair using tools such as combs, brushes, or spatulas. Furthermore, (2) the liquid hair swelling agent can be applied to the hair using the user's hands. Furthermore, (3) the liquid hair swelling agent can be applied to the hair by spraying it as a mist, aerosol, foam, etc. In addition, (4) it can be applied by operations such as impregnation (dipping), coating, and penetration. These methods may be used individually or in combination of two or more. Furthermore, the application process may involve applying the product to hair that is wet with water or warm water, or to dry hair.

[0071] Furthermore, the liquid hair swelling agent applied to the hair may be rinsed off before applying other formulations. In other words, a rinsing step can be included. Moreover, the liquid hair swelling agent applied to the hair may be applied to other formulations (such as layering) without rinsing it off. In other words, a layering step can be included. Furthermore, while the liquid hair swelling agent applied to the hair may be rinsed off immediately, it is also possible to leave it on for an appropriate amount of time to allow component B to penetrate the hair (the time the agent applied to the hair is left on). In other words, a waiting step can be included. When leaving the device unattended, there is no limit to the duration, but it can be, for example, 1 minute or more, or even 3 minutes or more. On the other hand, usually an unattended time of 15 minutes or less is sufficient, and it can be 10 minutes or less. These upper and lower limits can be combined as appropriate. Therefore, for example, the unattended time can be 1 to 15 minutes, or 3 to 10 minutes. [Examples]

[0072] The present invention will be described in more detail below with reference to examples, but these examples are merely illustrative examples for explanatory purposes, and the present invention is not limited in any sense to these examples.

[0073] [1] Hair swelling agent (1) Preparation of hair swelling agent The components shown in Table 1 were mixed in the ratios (mass%) shown in Table 1 to obtain hair swelling agents (Experimental Examples 1-1 to 1-15). Each component is in powder form, and the resulting hair swelling agents are also in powder (solid) form. The other component is a bulking agent, which is magnesium sulfate. Furthermore, Experimental Example 15 is a sugar-free example (comparative product).

[0074] [Table 1]

[0075] (2) Preparation of hair bundles for evaluation Black Asian human hair (hair diameter: 75-95 μm, roundness 80% or more) was treated with a perming solution (Hoyu Co., Ltd., product name "B-Wave") (solution 1 at 30°C for 15 minutes, rinsed with water, solution 2 at 30°C for 15 minutes), and then rinsed with water. After that, it was shampooed and dried with a hairdryer. Then, it was treated with a bleaching agent (Hoyu Co., Ltd., product name "Promaster EX LT") (at 30°C for 30 minutes), and then rinsed with water. After that, it was shampooed and dried with a hairdryer. The bleaching treatment was repeated three times. Hair bundles damaged by these treatments were obtained and used as evaluation bundles.

[0076] (3) Application and evaluation of hair swelling For each of the hair swelling agents from Experimental Examples 1-1 to 1-14, 5g was dissolved in water to prepare a 5% aqueous solution of the hair swelling agent. Then, each hair swelling agent (Experimental Examples 1-1 to 1-14) obtained in [1](1) above was applied to the evaluation hair bundles prepared in (2) above, and the degree of swelling of each evaluation hair after 10 minutes from the start of immersion was measured by the method described below. Specifically, one hair strand was fixed onto a glass slide with double-sided tape from the evaluation hair bundle, and an image of the hair before swelling was acquired using an optical microscope. A hair treatment solution was dropped onto the hair, and it was allowed to swell for 10 minutes. An image of the hair after swelling was acquired using an optical microscope (at the same position as before swelling). The hair diameter was measured from the hair image data both before and after swelling, and the hair cross-sectional area was calculated from this hair diameter (since hair with a high degree of circularity was used, the hair cross-section was approximated as a perfect circle). The swelling rate was then calculated as swelling rate = (hair cross-sectional area after swelling) / (hair cross-sectional area before swelling). The obtained swelling rates were rejected at the quartile level, and a Tukey-Kramer test (n=20) was performed. The significance level was set at p<0.05. Similarly, the swelling rate was calculated when a liquid hair swelling agent, which is a 5% aqueous solution of the hair swelling agent used in Experimental Example 1-15 (comparative example without sugar), was applied. Then, the degree of improvement in swelling rate for Experimental Examples 1-1 to 1-14 compared to the swelling rate using the hair swelling agent in Experimental Examples 1-15 was calculated as a percentage ((swelling rate in each experimental example - swelling rate in Experimental Example 1-15) / swelling rate in Experimental Example 1-15 × 100), and the results are shown in Table 1.

[0077] (4) Evaluation of formulation stability 50g each of the hair swelling agents (Experimental Examples 1-1 to 1-15) prepared in [1](1) above was divided into two groups and placed in containers. One container was stored in a constant temperature bath at 25°C (equivalent to room temperature) for one month. The other container was stored in a constant temperature bath at 50°C for one month. After one month, the color and odor of the hair swelling agents (Experimental Examples 1-1 to 1-15) in each container removed from the constant temperature bath were compared by 10 panelists specializing in formulation evaluation. Each panelist then selected the score that best reflected their perception according to the following five-level evaluation criteria, and the average score (arithmetic mean) of the scores selected by the 10 panelists was calculated. The obtained average score was scored based on the "Average Score Evaluation Criteria" shown below and is listed in Table 1 as the evaluation score for formulation stability.

[0078] Evaluation Criteria for Formulation Stability "5": No discoloration or odor was observed. "4": Slight discoloration and odor are observed. "3": Discoloration and odor are observed, but within acceptable limits. "2": Discoloration and an unusual odor were observed, indicating a problem. "1": Significant discoloration and odor are observed, indicating a problem.

[0079] Evaluation criteria for average scores of formulation stability "5": The average score is 4.6 or higher. "4": The average score is between 3.6 and 4.6. "3": The average score is between 2.6 and 3.6. "2": The average score is between 1.6 and 2.6. "1": The average score is less than 1.6.

[0080] [2] Evaluation of the effects associated with hair swelling The swelling of the hair makes it easier for various ingredients to penetrate the hair. The changes that occur as a result of this improved penetration were evaluated using hydrolyzed collagen (a hair repair ingredient). Specifically, the changes in shine, manageability, and smoothness obtained in conjunction with the changes in the penetration of hydrolyzed collagen were evaluated.

[0081] (1) Preparation of hair bundles for evaluation In the same manner as described in [1](2) above, evaluation hair bundles were obtained by damaging black Asian hair.

[0082] (2) Preparation of a hair treatment agent containing a hair swelling agent The components shown in Table 2 were mixed in the ratios (mass%) shown in Table 2 to obtain hair treatment agents containing a hair swelling agent (Experimental Examples 2-1 to 2-23). ​​Each component is in powder form, and the resulting hair swelling agents are also in powder (solid) form. The other component is a bulking agent, which is magnesium sulfate. Furthermore, Experimental Example 2-23 is a sugar-free example (comparative product).

[0083] (3) Application of hair treatment agents The hair bundles for evaluation obtained in [2](1) above were treated with each of the hair treatment agents (Experimental Examples 2-1 to 2-23) obtained in [2](2) above. Specifically, 5g of each hair swelling agent from Experimental Examples 2-1 to 2-23 was dissolved in water to prepare a 5% aqueous solution of the liquid hair swelling agent. Then, the hair bundles for evaluation were immersed in each of the liquid hair swelling agents (Experimental Examples 2-1 to 2-23).

[0084] [Table 2]

[0085] (4) Evaluation of gloss improvement Ten panelists specializing in hair evaluation compared the shine of the evaluated hair bundles (2-1 to 2-22) with the comparison hair bundle (2-23). ​​After comparing the shine with the evaluation criteria for shine improvement (three levels), each panelist selected the score that best reflected their perception. The average score (arithmetic mean) of the scores selected by the ten panelists was then calculated. The resulting average score was then graded based on the "Evaluation Criteria for Average Score" shown below, and the resulting shine improvement scores are shown in Table 2. The comparison hair bundles are those to which the hair treatment agent from Experimental Example 2-23 was applied.

[0086] Evaluation criteria for improving shine "3": A significant improvement in shine is observed. "2": An improvement in shine is observed. "1": No change in shine is observed.

[0087] Evaluation criteria for average score improvement in gloss "5": The average score is 2.8 or higher. "4": The average score is between 2.5 and 2.8. "3": The average score is between 2.0 and 2.5. "2": The average score is between 1.5 and 2.0. "1": The average score is less than 1.5.

[0088] (5) Evaluation of coherence Ten panelists specializing in hair evaluation compared the obtained hair bundles (2-1 to 2-22) with a comparison hair bundle (2-23) (based on how well each bundle held together when touched from root to tip). They then selected the score that best reflected their perception based on the following three-level cohesion evaluation criteria. The average score (arithmetic mean) of the scores selected by the ten panelists was then calculated. The resulting average score was then graded based on the "Average Score Evaluation Criteria" shown below, and the cohesion evaluation scores are shown in Table 2. The comparison hair bundles are those to which the hair treatment agent from Experimental Example 2-23 was applied.

[0089] Criteria for evaluating coherence "3": The sense of cohesion has greatly improved. "2": The sense of cohesion has improved. "1": The sense of cohesion has slightly improved.

[0090] Evaluation criteria for the average score of a group "5": The average score is 2.8 or higher. "4": The average score is between 2.5 and 2.8. "3": The average score is between 2.0 and 2.5. "2": The average score is between 1.5 and 2.0. "1": The average score is less than 1.5.

[0091] (6) Evaluation of finger feel Ten panelists specializing in hair evaluation compared the obtained hair bundles for evaluation (2-1 to 2-22) with a comparison hair bundle (2-23) (based on how easily the hair bundles felt when runny in the fingers). They then selected the score that best reflected their perception based on the following three-level evaluation criteria for hair smoothness. Finally, the average score (arithmetic mean) of the scores selected by the ten panelists was calculated. The resulting average score was then graded based on the "Evaluation Criteria for Average Score" shown below, and the evaluation scores for hair smoothness are shown in Table 2. The comparison hair bundles are those to which the hair treatment agent from Experimental Example 2-23 was applied.

[0092] Criteria for evaluating finger-feel "3": The texture has become much smoother. "2": Improved smoothness of the fingers. "1": Slightly improved smoothness.

[0093] Evaluation criteria for average finger-smoothness "5": The average score is 2.8 or higher. "4": The average score is between 2.5 and 2.8. "3": The average score is between 2.0 and 2.5. "2": The average score is between 1.5 and 2.0. "1": The average score is less than 1.5.

Claims

1. A hair swelling agent characterized by being composed of sugars.

2. The hair swelling agent according to claim 1, comprising a monosaccharide as the aforementioned sugar.

3. The hair swelling agent according to claim 1, comprising a sugar alcohol as the aforementioned sugar.

4. The hair swelling agent according to claim 1, wherein the aforementioned sugars are two or more types.

5. The hair swelling agent according to claim 3, comprising mannitol as the sugar alcohol.

6. The aforementioned sugars are of two or more types, Contains at least mannitol, Let S (mass%) be the mannitol content. When the content of sugars other than mannitol is denoted as T (mass%), The hair swelling agent according to claim 1, wherein the ratio of these (T / S) is 80 or less.

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