JP7624692B2 - Hair treatment composition and hair treatment method - Google Patents

Description

The present invention relates to a hair treatment composition for hair treatment and a hair treatment method for hair treatment.

As a treatment for improving the feel of hair, a single agent is widely used. Also known is a multi-agent hair treatment agent that improves the feel of hair by applying two or more agents. When using a multi-agent hair treatment agent, there are various needs such as softness, luster, smoothness, firmness, manageability, moisturizing, and elasticity of the hair after use. For example, Patent Document 1 discloses a multi-agent hair treatment agent for improving the softness of hair. This multi-agent hair treatment agent comprises a pretreatment agent containing an anionic acrylic polymer and a posttreatment agent containing a cationic surfactant and a higher alcohol, and has the effect of improving the softness of hair when the posttreatment agent is applied and the moisturizing feel of the hair after treatment.

JP 2018-090519 A

Multi-component hair treatments give hair a moisturized feel by applying the oily ingredients contained in the post-treatment agent to the hair. For this reason, conventional multi-component hair treatments have been developed with pre-treatment agents developed to allow the oily ingredients in the post-treatment agent to act effectively on the hair. However, there is a problem in that applying too many oily ingredients can result in a loss of uniformity in the treatment effect on the entire hair.

The object of the present invention is to provide a hair treatment composition for treatment in which the first and second agents are applied to the hair in layers, and which provides a uniform treatment effect.

After extensive research into the above problem, the inventor discovered that by applying to hair a first agent containing a nonionic surfactant, a specific ionic surfactant, and an oily component in a specific mass ratio, and a second agent containing an oily component in layers, the first agent washes away the excess oily component of the second agent, allowing the first agent to apply the oily component of the second agent evenly to the entire hair, thus arriving at the present invention.

The hair treatment composition of the present invention is a hair treatment composition for treatment which has a first agent and a second agent, and which is applied to hair by overlapping the first agent and the second agent, wherein the first agent contains (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms, and when the first agent further contains (D1) an oily component, the ratio of the sum of the content of the component (A) and the content of the component (B) to the content of the component (D1) ((A+B)/D1) is 0.05 or more and the ratio of the contents of the component (A) and the component (B) (A/B) is 0.025 to 50, and the second agent contains (C) a surfactant and (D2) an oily component.
This hair treatment composition can suppress the excessive treatment effect of the oily component (D2) contained in the second agent, and can provide a uniform treatment effect to the entire hair. The nonionic surfactant (A) and the ionic surfactant (B) having only one hydrocarbon group having 8 or more carbon atoms contained in the first agent are considered to have the effect of spreading the oily component (D2) contained in the second agent over the entire hair, while washing away the excess oily component (D2). In the hair treatment composition of the present invention, when the first agent contains the oily component (D1), the sum of the contents of the components (A) and (B) is 0.05 or more relative to the content of the component (D1), so that the components (A) and (B) contained in the first agent are not only used to emulsify the oily component (D1), but also have the effect of spreading the oily component (D2) contained in the second agent applied over the entire hair and washing away the oily component (D2) applied in excess in the second agent.
When the ratio (A/B) of the contents of the (A) component and the (B) component is 0.025 or more, the effect of imparting a uniform treatment effect to the entire hair is improved, and the moisturizing feeling and the smoothness of the hair are also improved. When the ratio (A/B) is 50 or less, the effect of imparting a uniform treatment effect to the entire hair is improved, and the moisturizing feeling and the smoothness of the hair are also improved.

In one embodiment of the hair treatment composition of the present invention, the component (B) is an amphoteric surfactant.
This feature makes it possible to more effectively achieve the effect of the present invention, which is to provide a uniform treatment effect over the entire hair.

In one embodiment of the hair treatment composition of the present invention, the component (A) is a nonionic surfactant having an HLB of 14 or more.
This feature makes it possible to more effectively achieve the effect of the present invention, which is to provide a uniform treatment effect over the entire hair.

One embodiment of the hair treatment composition of the present invention is characterized in that the second agent is applied after the first agent is applied.
This feature can further enhance the effect of the present invention, which is to provide a uniform treatment effect to the entire hair, as well as to improve the moisturizing feeling and smoothness of the hair.

In one embodiment of the hair treatment composition of the present invention, the first agent is in the form of a foam on the hair.
This feature makes it possible to more effectively achieve the effect of the present invention, that is, to provide a uniform treatment effect to the entire hair.

In one embodiment of the hair treatment composition of the present invention, the component (D1) in the first agent contains (d1) an amino-modified silicone.
This feature can further enhance the effect of the present invention, that is, the ability to provide a uniform treatment effect to the entire hair, and can also further enhance the effect of improving the moisturizing feeling.

In one embodiment of the hair treatment composition of the present invention, the component (D2) in the second agent contains (d1) an amino-modified silicone and (d2) a dimethyl silicone oil.
This feature can further enhance the effect of the present invention, which is to provide a uniform treatment effect to the entire hair, as well as to improve the moisturizing feeling and smoothness of the hair.

The hair treatment method of the present invention is a hair treatment method for treatment in which a first agent and a second agent are applied to hair in layers, the first agent contains (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group with 8 or more carbon atoms, and when it further contains (D1) an oily component, the ratio of the sum of the content of the (A) component and the content of the (B) component to the content of the (D1) component ((A+B)/D1) is 0.05 or more, and the ratio of the content of the (A) component to the content of the (B) component (A/B) is 0.025 to 50, and the second agent contains (C) a surfactant and (D2) an oily component.

The present invention provides a hair treatment composition for treatment in which the first and second agents are applied to the hair in layers, and which provides a uniform treatment effect.

[Hair Treatment Composition]
The hair treatment composition for treatment and the hair treatment method for treatment of the present invention will be described below. The hair treatment composition of the present invention is a hair treatment composition having a first agent and a second agent. The hair treatment composition of the present invention may contain other agents in addition to the first agent and the second agent.
In this specification, unless otherwise specified, the content refers to the content in the first or second agent.

The hair treatment composition of the present invention is a hair treatment composition for treatment comprising a first agent and a second agent, the first agent and the second agent being applied to hair in a layered manner, the first agent containing (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms, and the second agent containing (C) a surfactant and (D2) an oily component. When the first agent contains the oily component (D1), the ratio ((A+B)/D1) of the sum of the content of the component (A) and the content of the component (B) to the content of the component (D1) is 0.05 or more, and the ratio (A/B) of the content of the component (A) to the content of the component (B) is 0.025 to 50.
Here, "applying the first and second agents to the hair in layers" means that the first and second agents are applied at different times and are on the hair at the same time. In other words, it means that the first and second agents are applied to the hair separately without being mixed, and the previously applied agent is not washed off between the application of the first and second agents.

[Regarding the first agent]
The first agent is characterized by containing (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms. The components contained in the first agent are described below.

<(A) Nonionic Surfactant>
The nonionic surfactant is a surfactant having a nonionic hydrophilic group and a hydrophobic group. The nonionic hydrophilic group is not particularly limited, but may be, for example, a polyoxyethylene chain, or a hydroxyl group in glycerin or sorbitan. The number of carbon atoms of the fatty acid (hydrocarbon group) constituting the hydrophobic group is not particularly limited, but may be, for example, 8 or more, preferably 10 or more, and more preferably 12 or more. The upper limit of the number of carbon atoms is, for example, 35 or less, preferably 30 or less, more preferably 25 or less, and even more preferably 20 or less.

Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol tetra fatty acid esters, polyoxyethylene phytosterols, glycerin fatty acid esters, polyglycerin fatty acid esters, sucrose fatty acid esters, alkyl polyglucosides, and polyoxyethylene glycerin fatty acid esters. Preferred are polyoxyethylene sorbitan fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene sorbitol tetra fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene polyoxypropylene alkyl ethers, and more preferred are polyoxyethylene sorbitan fatty acid esters, polyglycerin fatty acid esters, and polyoxyethylene sorbitol tetra fatty acid esters.

The HLB value of the nonionic surfactant is not particularly limited, but is preferably 10 or more, more preferably 12 or more, and even more preferably 14 or more. By containing a nonionic surfactant with an HLB value of 14 or more, when the second agent is washed away, the nonionic surfactant and water become more compatible with each other, and this has the effect of providing an excellent action of washing away the oily component (D2) applied in excess in the second agent. Note that "HLB" is an abbreviation for Hydrophile-Lipophile Balance, and is generally a parameter that indicates the relative strength of the hydrophilicity and lipophilicity of a surfactant molecule. The higher the HLB value, the stronger the hydrophilicity, and the smaller the HLB value, the stronger the lipophilicity. The HLB value is calculated from the well-known Griffin formula.

(Polyoxyethylene sorbitan fatty acid ester)
Polyoxyethylene sorbitan fatty acid ester is a compound obtained by adding ethylene oxide to sorbitan fatty acid ester. Examples include polyoxyethylene (20) sorbitan monococoate, polyoxyethylene (20) sorbitan monooleate, polyoxyethylene (20) sorbitan monostearate, polyoxyethylene (20) sorbitan trioleate, polyoxyethylene (6) sorbitan monooleate, polyoxyethylene (20) sorbitan monolaurate, polyoxyethylene (20) sorbitan isostearate, etc. Preferred are polyoxyethylene (20) sorbitan monococoate (PEG-20 sorbitan cocoate), polyoxyethylene (20) sorbitan monooleate (polysorbate 80), polyoxyethylene (20) sorbitan monostearate (polysorbate 60), and polyoxyethylene (20) sorbitan isostearate (PEG-20 sorbitan isostearate).
The number of moles of polyoxyethylene added to the polyoxyethylene sorbitan fatty acid ester is not particularly limited, but is preferably 2 to 100. The lower limit of the number of moles of polyoxyethylene added to the polyoxyethylene sorbitan fatty acid ester is preferably 5 or more, more preferably 7 or more, even more preferably 10 or more, and particularly preferably 15 or more. The upper limit of the number of moles of polyoxyethylene added to the polyoxyethylene sorbitan fatty acid ester is preferably 50 or less, more preferably 40 or less, even more preferably 30 or less, and particularly preferably 25 or less.

(Polyglycerol fatty acid ester)
Polyglycerol fatty acid ester is a compound obtained by esterifying polyglycerol fatty acid obtained by dehydration condensation of glycerol. The average number of moles of polyglycerol chains is not particularly limited, but is, for example, 2 to 20 moles. The lower limit of the average number of moles of polyglycerol chains is preferably 5 or more. The upper limit of the average number of moles of polyglycerol chains is preferably 15 or less, more preferably 10 or less.
The polyglycerol fatty acid ester is preferably polyglyceryl-6 laurate, polyglyceryl-10 laurate, or polyglyceryl-10 myristate.

(Polyoxyethylene sorbitol tetra fatty acid ester)
Polyoxyethylene sorbitol tetrafatty acid ester is a compound obtained by adding ethylene oxide to sorbitol and further esterifying it with a fatty acid. Examples include polyoxyethylene (30) sorbitol tetraoleate, polyoxyethylene (40) sorbitol tetraoleate, polyoxyethylene (60) sorbitol tetraoleate, polyoxyethylene (6) sorbitol hexastearate, and polyoxyethylene (6) sorbitol monolaurate. Polyoxyethylene (60) sorbitol tetraoleate (sorbeth-60 tetraoleate) is preferred.
The number of moles of polyoxyethylene added to polyoxyethylene sorbitol tetrafatty acid ester is not particularly limited, but is preferably 2 to 100. The lower limit of the number of moles of polyoxyethylene added to polyoxyethylene sorbitol tetrafatty acid ester is preferably 5 or more, more preferably 10 or more, even more preferably 20 or more, and particularly preferably 25 or more. The upper limit of the number of moles of polyoxyethylene added to polyoxyethylene sorbitol tetrafatty acid ester is preferably 90 or less, more preferably 80 or less, even more preferably 75 or less, and particularly preferably 70 or less.

(Polyoxyethylene alkyl ether)
Polyoxyethylene alkyl ether is a compound obtained by adding ethylene oxide to a higher alcohol. The number of moles of polyoxyethylene added in the polyoxyethylene alkyl ether is not particularly limited, but is preferably 2 to 100. The lower limit of the number of moles of polyoxyethylene added in the polyoxyethylene alkyl ether is preferably 5 or more, more preferably 8 or more, even more preferably 10 or more, and particularly preferably 15 or more. The upper limit of the number of moles of polyoxyethylene added in the polyoxyethylene alkyl ether is preferably 80 or less, more preferably 70 or less, even more preferably 65 or less, and particularly preferably 60 or less.

(Polyoxyethylene polyoxypropylene alkyl ether)
Polyoxyethylene polyoxypropylene alkyl ethers are compounds obtained by adding ethylene oxide or propylene oxide to higher alcohols, such as polyoxyethylene polyoxypropylene cetyl ether, polyoxyethylene polyoxypropylene decyl tetradecyl ether, and polyoxyethylene polyoxypropylene ethylhexyl ether.
The number of moles of polyoxyethylene added in the polyoxyethylene polyoxypropylene alkyl ether is not particularly limited, and is, for example, 2 to 100. The lower limit of the number of moles of polyoxyethylene added in the polyoxyethylene polyoxypropylene alkyl ether is preferably 5 or more, more preferably 8 or more, and even more preferably 10 or more. The upper limit of the number of moles of polyoxyethylene added in the polyoxyethylene polyoxypropylene alkyl ether is preferably 50 or less, more preferably 40 or less, even more preferably 35 or less, and particularly preferably 30 or less.
The number of moles of polyoxypropylene added in the polyoxyethylene polyoxypropylene alkyl ether is not particularly limited, and is, for example, 2 to 100. The lower limit of the number of moles of polyoxypropylene added in the polyoxyethylene polyoxypropylene alkyl ether is preferably 2 or more. The upper limit of the number of moles of polyoxypropylene added in the polyoxyethylene polyoxypropylene alkyl ether is preferably 50 or less, more preferably 40 or less, even more preferably 30 or less, and particularly preferably 20 or less.

The content of the nonionic surfactant (A) in the first agent is not particularly limited, but is, for example, 0.001 to 30% by mass. The lower limit of the content of the nonionic surfactant is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more. The upper limit of the content of the nonionic surfactant is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 2% by mass or less. By making the content of the nonionic surfactant 0.001 to 30% by mass, the effect of removing oily components is improved. This makes it possible to further exert the effect of the present invention, which is to provide a uniform treatment effect to the entire hair. In addition, the effect of improving the moisturizing feeling and the smoothness of the hair can be further exerted.

<(B) Ionic Surfactant Having Only One Hydrocarbon Group Having 8 or More Carbon Atoms>
An ionic surfactant is a surfactant having a hydrophilic group, either amphoteric, anionic, or cationic, and a hydrophobic group. The number of carbon atoms in the fatty acid (hydrocarbon group) constituting the hydrophobic group is 8 or more, preferably 10 or more. The upper limit of the number of carbon atoms is, for example, 35 or less, preferably 30 or less, more preferably 25 or less, and even more preferably 20 or less.

The ionic surfactant of component (B) of the present invention is characterized by having only one hydrocarbon group with 8 or more carbon atoms. This ionic surfactant assists the removal effect of component (A) of oily components (D2) and can turn the preparation into a foam. By turning the preparation into a foam, the first agent is applied evenly to the hair, so that the effect of the present invention of making the treatment effect uniform can be more effectively achieved. On the other hand, ionic surfactants having two or more hydrocarbons with 8 or more carbon atoms are inferior in the removal effect of oily components (D2) and cannot obtain the effect of the present invention.

In component (B), preferred ionic surfactants are amphoteric surfactants and anionic surfactants, and amphoteric surfactants are particularly preferred. By using an amphoteric surfactant, the effect of the present invention, which is to provide a uniform treatment effect to the entire hair, can be further exerted.

(Amphoteric surfactant)
Amphoteric surfactants are broadly classified into amino acid type amphoteric surfactants and betaine type amphoteric surfactants.
Specific examples of the amino acid type amphoteric surfactant include sodium N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine (sodium lauroamphoacetate), 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine (sodium cocoamphoacetate), sodium undecylhydroxyethylimidazolinium betaine, alkyldiaminoethylglycine hydrochloride, sodium N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine, sodium N-coconut oil fatty acid acyl-N'-carboxyethoxyethylenediamine ... glycine type amphoteric surfactants such as sodium lauryl-N'-carboxyethylethylenediamine disodium, N-coconut oil fatty acid acyl-N'-carboxymethoxyethyl-N'-carboxymethylethylenediamine disodium, sodium lauryl diaminoethylglycine, and palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium; aminopropionic acid type amphoteric surfactants such as sodium lauryl aminopropionate, sodium lauryl aminodipropionate, and triethanolamine lauryl aminopropionate; and the like.
Specific examples of betaine-type amphoteric surfactants include aminoacetic acid betaine-type amphoteric surfactants such as coconut oil alkyl betaine, lauryl dimethylaminoacetic acid betaine, myristyl dimethylaminoacetic acid betaine, stearyl dimethylaminoacetic 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.

The (B) component is preferably a betaine-type amphoteric surfactant, more preferably lauryl dimethylaminoacetic acid betaine (lauryl betaine), coconut oil alkyl betaine (coco betaine), isostearamidopropyl betaine, lauric acid amidopropyl betaine (lauramidopropyl betaine), or coconut oil fatty acid amidopropyl betaine (cocamidopropyl betaine).

(Anionic Surfactant)
Examples of anionic surfactants include fatty acid salts, metal soaps, polyoxyethylene alkyl ether carboxylates, acyl lactates, N-acyl sarcosine salts, N-acyl glutamates, N-acyl methyl alanines, N-acyl methyl taurines, alkanesulfonates, α-olefin sulfonates, α-sulfo fatty acid methyl ester salts, alkyl sulfosuccinates, acyl isethionates, alkyl sulfates, polyoxyethylene alkyl ether sulfates, fatty acid alkanolamide sulfates, monoacyl glycerin sulfates, monoalkyl phosphates, and polyoxyethylene alkyl ether phosphates. The counter ion of the anionic group of these surfactants may be, for example, any of sodium ions, potassium ions, and triethanolamine. Preferably, it is N-acyl methyl taurine salt.

More specifically, examples include sodium lauryl sulfate, sodium myristyl sulfate, potassium lauryl sulfate, ammonium lauryl sulfate, triethanolamine lauryl sulfate, sodium cetyl sulfate, sodium stearyl sulfate, sodium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene lauryl ether acetate, triethanolamine polyoxyethylene lauryl ether sulfate, ammonium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene stearyl ether sulfate, sodium coconut oil fatty acid methyl taurate, sodium stearoyl methyl taurate, triethanolamine dodecylbenzenesulfonate, sodium tetradecenesulfonate, sodium lauryl phosphate, polyoxyethylene lauryl ether phosphoric acid and its salts, N-lauroyl glutamate salts (such as sodium lauroyl glutamate), N-lauroyl methyl-β-alanine salts, N-acyl glycine salts, N-acyl glutamate salts, the higher fatty acids lauric acid, myristic acid, and salts of these higher fatty acids. One or more of these may be used. Particularly preferred is sodium methyl taurate of coconut oil fatty acid (Na methyl cocoyl taurate).

(Cationic Surfactant)
Examples of the cationic surfactant include alkyl quaternary ammonium salts such as monoalkyl-type quaternary ammonium salts, benzalkonium-type quaternary ammonium salts, and monoalkyl ether-type quaternary ammonium salts, amine salts such as alkylamine salts, fatty acid amide amine salts, ester-containing tertiary amine salts, and arcobel-type tertiary amine salts, cyclic quaternary ammonium salts such as alkylpyridinium salts and alkylisoquinolium salts, and benzethonium chloride, etc. Preferred are monoalkyl-type quaternary ammonium salts.

Examples of monoalkyl quaternary ammonium salts include lauryl trimethyl ammonium chloride, lauryl trimethyl ammonium bromide, alkyl (16,18) trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, cetyl trimethyl ammonium saccharin, stearyl trimethyl ammonium chloride, stearyl trimethyl ammonium bromide, behenyl trimethyl ammonium chloride, stearyl trimethyl ammonium saccharin, alkyl (28) trimethyl ammonium chloride, dipolyoxyethylene (2) oleyl methyl ammonium chloride, dipolyoxyethylene stearyl methyl ammonium chloride, polyoxyethylene (1) polyoxypolypropylene (25) diethyl methyl ammonium chloride, polyoxypolypropylene methyl diethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, behenyl trimethyl ammonium methyl sulfate, etc. Particularly preferred are stearyl trimethyl ammonium chloride (steartrimonium chloride), alkyl (16,18) trimethyl ammonium chloride, and cetyl trimethyl ammonium chloride.

The content of the ionic surfactant (B) having only one hydrocarbon group with 8 or more carbon atoms in the first agent is not particularly limited, but is, for example, 0.001 to 30% by mass. The lower limit of the content of the ionic surfactant of the component (B) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more. The upper limit of the content of the ionic surfactant of the component (B) is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 2% by mass or less. By making the content of the ionic surfactant of the component (B) 0.001 to 30% by mass, the effect of removing oily components is improved. This makes it possible to further exert the effect of the present invention, which is to provide a uniform treatment effect to the entire hair. In addition, the effect of improving the moisturizing feeling and the smoothness of the hair can be further exerted.

The ratio (A/B) of the contents of the (A) and (B) components in the first agent is 0.025 to 50. If A/B is less than 0.025, the effect of the present invention of being able to provide a uniform treatment effect to the entire hair is reduced. On the other hand, if A/B exceeds 50, the effect of removing oily components becomes too strong, and the effect of the present invention of being able to provide a uniform treatment effect to the entire hair is reduced. Furthermore, the moisturizing feeling and the ease of running your fingers through the hair are also deteriorated. The lower limit of A/B is preferably 0.05 or more, more preferably 0.1 or more, and even more preferably 0.2 or more. The upper limit of A/B is preferably 30 or less, more preferably 20 or less, and even more preferably 10 or less.

<(D1) Oil-based component>
The first agent may contain an oil component (D1). Examples of the oil component (D1) include silicone oil, higher alcohol, oils and fats, waxes, hydrocarbons, higher fatty acids, alkyl glyceryl ethers, esters, and fluorine oils. One or more of these oil components may be selected and used. Silicone oil, oils and fats, hydrocarbons, and esters are preferred, and silicone oil is particularly preferred.

Silicone oil is a synthetic polymer in which silicon with an organic group and oxygen are alternately linked by chemical bonds. Examples of silicone oil include (d2) dimethyl silicone oil, methylphenyl polysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, polyether-modified silicone, (d1) amino-modified silicone, betaine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, mercapto-modified silicone, carboxy-modified silicone, and fluorine-modified silicone. (d1) amino-modified silicone and (d2) dimethyl silicone oil are preferred, and (d1) amino-modified silicone is particularly preferred. By incorporating amino-modified silicone in the first agent, the effect of the present invention, which can provide a uniform treatment effect to the entire hair, is more clearly demonstrated.

(d1) Amino-modified silicone is a copolymer of dimethyl silicone oil and γ-(β-aminoethyl)aminopropylmethylsiloxane. Examples include aminopropylmethylsiloxane-dimethylsiloxane copolymer (INCI name: aminopropyl dimethicone), aminoethylaminopropylsiloxane-dimethylsiloxane copolymer (INCI name: amodimethicone), aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer (INCI name: trimethylsilylamodimethicone), etc. Preferred are amodimethicone, aminopropyl dimethicone, and biscetearyl amodimethicone.

(d2) Examples of dimethyl silicone oils include dimethylpolysiloxane (INCI name: dimethicone), highly polymerized dimethicone, low-polymerized dimethicone, dimethylpolysiloxane with hydroxyl terminal groups (INCI name: dimethiconol), highly polymerized dimethiconol, and low-polymerized dimethiconol.

Examples of higher alcohols include cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, arachyl alcohol, behenyl alcohol, lauryl alcohol, myristyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, and decyltetradecanol.

The oils and fats are triglycerides, that is, triesters of fatty acids and glycerin. Examples include olive oil, rosehip oil, camellia oil, shea butter, macadamia nut oil, almond oil, tea seed oil, camellia oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, beef tallow, cocoa butter, corn oil, peanut oil, rapeseed oil, rice bran oil, rice germ oil, wheat germ oil, pearl barley oil, grape seed oil, avocado oil, carrot oil, castor oil, linseed oil, coconut oil, mink oil, egg yolk oil, etc.

Waxes are esters of higher fatty acids and higher alcohols. Examples include beeswax, candelilla wax, carnauba wax, jojoba oil, lanolin, spermaceti, rice bran wax, sugarcane wax, palm wax, montan wax, cotton wax, bayberry wax, ivory wax, kapok wax, and shellac wax.

Hydrocarbons are compounds consisting of carbon and hydrogen. Examples include liquid paraffin, paraffin, microcrystalline wax, petrolatum, isoparaffins, ozokerite, ceresin, polyethylene, α-olefin oligomer, polybutene, synthetic squalane, squalene, hydrogenated squalane, limonene, and turpentine.

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 acid.

Examples of alkyl glyceryl ethers include batyl alcohol, chimyl alcohol, selachyl alcohol, and isostearyl glyceryl ether.

Esters are compounds obtained by the dehydration reaction of fatty acids with alcohols. For example, diisopropyl adipate, 2-hexyldecyl adipate, isopropyl myristate, myristyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, diisopropyl sebacate, isopropyl palmitate, 2-ethylhexyl palmitate, cetyl ethylhexanoate, butyl stearate, isocetyl isostearate, hexyl laurate, decyl oleate, fatty acids (C10-30) (cholesteryl/lanosyl) teryl), lauryl lactate, octyldodecyl lactate, lanolin acetate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, lanolin derivatives, octyldodecyl myristate, glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, pentaerythritol tetraisostearate, dimer dilinoleyl dimer dilinoleate, di(isostearyl/phytosteryl) dilinoleate, etc.

The content of the oil component (D1) in the first agent is not particularly limited, but is preferably 0.01 to 10 mass%. The lower limit of the oil component content is more preferably 0.05 mass% or more, even more preferably 0.1 mass% or more, and particularly preferably 0.2 mass% or more. The upper limit of the oil component content is more preferably 5 mass% or less, even more preferably 4 mass% or less, and particularly preferably 3 mass% or less.

The ratio ((A+B)/D1) of the sum of the contents of the (A) and (B) components in the first agent to the content of the (D1) component is 0.05 or more. The lower limit of (A+B)/D1 is preferably 0.1 or more, more preferably 0.3 or more, even more preferably 0.5 or more, and particularly preferably 1.0 or more. By making the sum of the contents of the (A) and (B) components relative to the content of the (D1) component 0.05 or more, the (A) and (B) components contained in the first agent are not only used to emulsify the (D1) oily component, but also have the effect of spreading the oily component contained in the second agent applied over the entire hair and washing away the oily component applied in excess in the second agent.

<Polyhydric alcohol>
Examples of polyhydric alcohols include glycols and glycerins. Examples of glycols include ethylene glycol, polyethylene glycol, highly polymerized polyethylene glycol, propylene glycol (PG), dipropylene glycol, polypropylene glycol, isoprene glycol, and 1,3-butylene glycol. Examples of glycerins include glycerin, diglycerin, and polyglycerin. Of these polyhydric alcohols, only one type may be contained alone, or two or more types may be contained in combination. By containing a polyhydric alcohol, the feel of the hair can be improved.

The content of polyhydric alcohol in the first agent is not particularly limited, but is preferably 0.1 to 20% by mass. The lower limit of the content of polyhydric alcohol is more preferably 0.5% by mass or more, even more preferably 1% by mass or more, and particularly preferably 2% by mass or more. The upper limit of the content of polyhydric alcohol is more preferably 15% by mass or less, even more preferably 10% by mass or less, and particularly preferably 8% by mass or less.

The pH of the first agent in the hair treatment composition of the present invention is not particularly limited, but is preferably 4 to 7. The pH of the first agent is measured at 25°C when the first agent is dissolved in water at a concentration of 10% by mass.

The state (form) of the solution of the first agent is not particularly limited, but may be, for example, a liquid (solubilized liquid, emulsion, suspension), gel, cream, etc. A liquid (solubilized liquid, emulsion, suspension) is preferable. By making it a liquid, the applicability of the first agent to hair is improved, and it can be applied evenly to the entire hair. This further enhances the effect of the present invention, which is to provide a uniform treatment effect to the entire hair. Note that the solubilized liquid is a transparent liquid in which the oily component is incorporated into fine micelles, the emulsion is a liquid in which droplets of the oily component are dispersed and the liquid is cloudy, and the suspension is a liquid in which fine particles are dispersed and the liquid is cloudy.

The viscosity of the first agent (25°C) is not particularly limited, but is preferably 20000 mPa·s or less. By adjusting the viscosity of the first agent to 20000 mPa·s or less, the applicability of the first agent to hair is improved, and the first agent can be applied evenly to the entire hair. This further enhances the effect of the present invention, which is to provide a uniform treatment effect to the entire hair.
In this specification, the viscosity is measured using a B-type viscometer (TV-10 model, manufactured by Toki Sangyo Co., Ltd.) The measurement conditions are as follows: temperature is adjusted to 25° C., and when the viscosity is less than 5000 mPa·s, the measurement is performed using a No. 3 rotor at a rotation speed of 12 rpm for 1 minute, when the viscosity is 5000 to 50000 mPa·s, the measurement is performed using a No. 4 rotor at a rotation speed of 12 rpm for 1 minute, and when the viscosity exceeds 50000 mPa·s, the measurement is performed using a No. 4 rotor at a rotation speed of 6 rpm for 1 minute.

The formulation when applied to the hair is not particularly limited, but is preferably liquid or foam, and is particularly preferably foam. Note that a foam formulation includes an embodiment in which the formulation is applied as a foam at the time of application, as well as an embodiment in which the formulation is applied to the hair as a liquid or mist and then lathered on the hair. This further enhances the effect of the present invention, which is to provide a uniform treatment effect to the entire hair.

[Regarding the second agent]
The second agent is characterized by containing a surfactant (C) and an oil component (D2). The components contained in the second agent are described below.

<(C) Surfactant>
The surfactant is blended for the purpose of emulsifying the oily component of the second agent, and may be any of cationic surfactants, anionic surfactants, amphoteric surfactants, and nonionic surfactants. It is preferable to contain a cationic surfactant from the viewpoint that it can form a cream when blended with the oily component. More preferably, it is a monoalkyl type quaternary ammonium salt, and even more preferably, it is stearyl trimethyl ammonium chloride (steartrimonium chloride) or behenyl trimethyl ammonium chloride (behentrimonium chloride).

The nonionic surfactant and the ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms are similar to the components (A) and (B) added to the first agent, and therefore a description thereof will be omitted.
Examples of the ionic surfactant having two or more hydrocarbon groups each having 8 or more carbon atoms include dialkyl-type quaternary ammonium salts and diacylglutamic acid lysine salts.
Examples of dialkyl-type quaternary ammonium salts include dialkyl(12-15)dimethylammonium chloride, dialkyl(12-18)dimethylammonium chloride, dialkyl(14-18)dimethylammonium chloride, dicocoyl dimethylammonium chloride, dicetyl dimethylammonium chloride, distearyl dimethylammonium chloride, and isostearyl lauryl dimethylammonium chloride.
Examples of diacylglutamic acid lysine salts include sodium dilauroylglutamic acid lysine.

The content of the surfactant (C) in the second agent is not particularly limited, but is, for example, 0.01 to 30% by mass. The lower limit of the content of the surfactant in the (C) component is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, and particularly preferably 2% by mass or more. The upper limit of the content of the surfactant in the (C) component is preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 8% by mass or less, and particularly preferably 5% by mass or less. By setting the content of the surfactant in the (C) component to 0.001 to 30% by mass, the oily component can be emulsified to prepare a cream-like second agent. This allows the effect of the present invention to be further enhanced, which is excellent in applicability to hair and can provide a uniform treatment effect to the entire hair because it assists in removing the oily component of the first agent. In addition, the effect of improving the moisturizing feeling and the smoothness of the hair can be further enhanced.

<(D2) Oily component>
Examples of oily components include silicone oils, higher alcohols, fats and oils, waxes, hydrocarbons, higher fatty acids, alkyl glyceryl ethers, esters, fluorine oils, etc. Among these oily components, one or more kinds may be used. Preferred are silicone oils, oils and fats, hydrocarbons, and esters, and particularly preferred are silicone oils.

Silicone oil is a synthetic polymer in which silicon with an organic group and oxygen are alternately linked by chemical bonds. Examples of silicone oil include (d2) dimethyl silicone oil, methylphenyl polysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, polyether modified silicone, (d1) amino modified silicone, betaine modified silicone, alkyl modified silicone, alkoxy modified silicone, mercapto modified silicone, carboxy modified silicone, and fluorine modified silicone.

(d1) Amino-modified silicone is a copolymer of dimethyl silicone oil and γ-(β-aminoethyl)aminopropylmethylsiloxane. Examples include aminopropylmethylsiloxane-dimethylsiloxane copolymer (INCI name: aminopropyl dimethicone), aminoethylaminopropylsiloxane-dimethylsiloxane copolymer (INCI name: amodimethicone), aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer (INCI name: trimethylsilylamodimethicone), etc. Preferred are amodimethicone, aminopropyl dimethicone, and biscetearyl amodimethicone.

The amino equivalent of the amino-modified silicone (d1) contained in the second agent is not particularly limited, but is, for example, 1000 g/mol or more.

The viscosity of the amino-modified silicone (d1) contained in the second agent is not particularly limited, but is, for example, 500 to 3000 mm ² /s.

The content of (d1) amino-modified silicone in the second agent is not particularly limited, but is preferably 0.1 to 30 mass%. The lower limit of the amino-modified silicone content is more preferably 0.5 mass% or more, even more preferably 1 mass% or more, and particularly preferably 2 mass% or more. The upper limit of the amino-modified silicone content is more preferably 15 mass% or less, even more preferably 10 mass% or less, and particularly preferably 8 mass% or less.

(d2) Examples of dimethyl silicone oils include dimethylpolysiloxane (INCI name: dimethicone), highly polymerized dimethicone, low-polymerized dimethicone, dimethylpolysiloxane with hydroxyl terminal groups (INCI name: dimethiconol), highly polymerized dimethiconol, and low-polymerized dimethiconol.

The degree of polymerization of dimethicone is not particularly limited, but is preferably 2000 or more. The degree of polymerization of dimethiconol is not particularly limited, but is preferably 2000 or more.

The content of (d2) dimethyl silicone oil in the second agent is not particularly limited, but is preferably 0.1 to 50 mass%. The lower limit of the content of dimethyl silicone oil is more preferably 0.5 mass% or more, even more preferably 1 mass% or more, and particularly preferably 2 mass% or more. The upper limit of the content of dimethyl silicone oil is more preferably 40 mass% or less, even more preferably 30 mass% or less, and particularly preferably 20 mass% or less.

In the second agent of the present invention, it is preferable to use (d1) amino-modified silicone and (d2) dimethyl silicone oil in combination. This makes it possible to further exert the effect of the present invention, which is to provide a uniform treatment effect to the entire hair. It also makes it possible to further exert the effect of improving the moisturizing feeling and smoothness of the hair.

The ratio (d1/d2) of the content of (d1) amino-modified silicone to (d2) dimethyl silicone oil is not particularly limited, but is preferably 0.1 to 10. The lower limit of d1/d2 is more preferably 0.25 or more, and even more preferably 0.5 or more. The upper limit of d1/d2 is more preferably 7.5 or less, and even more preferably 5 or less. By setting d1/d2 in this range, it is possible to achieve both a moisturizing feel and a smooth feel.

Examples of higher alcohols include cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, arachyl alcohol, behenyl alcohol, lauryl alcohol, myristyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, and decyltetradecanol.

The oils and fats are triglycerides, that is, triesters of fatty acids and glycerin. Examples include olive oil, rosehip oil, camellia oil, shea butter, macadamia nut oil, almond oil, tea seed oil, camellia oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, beef tallow, cocoa butter, corn oil, peanut oil, rapeseed oil, rice bran oil, rice germ oil, wheat germ oil, pearl barley oil, grape seed oil, avocado oil, carrot oil, castor oil, linseed oil, coconut oil, mink oil, egg yolk oil, etc.

Waxes are esters of higher fatty acids and higher alcohols. Examples include beeswax, candelilla wax, carnauba wax, jojoba oil, lanolin, spermaceti, rice bran wax, sugarcane wax, palm wax, montan wax, cotton wax, bayberry wax, ivory wax, kapok wax, and shellac wax.

Hydrocarbons are compounds consisting of carbon and hydrogen. Examples include liquid paraffin, paraffin, microcrystalline wax, petrolatum, isoparaffins, ozokerite, ceresin, polyethylene, α-olefin oligomer, polybutene, synthetic squalane, squalene, hydrogenated squalane, limonene, and turpentine.

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 acid.

Examples of alkyl glyceryl ethers include batyl alcohol, chimyl alcohol, selachyl alcohol, and isostearyl glyceryl ether.

Esters are compounds obtained by the dehydration reaction of fatty acids with alcohols. For example, diisopropyl adipate, 2-hexyldecyl adipate, isopropyl myristate, myristyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, diisopropyl sebacate, isopropyl palmitate, 2-ethylhexyl palmitate, cetyl ethylhexanoate, butyl stearate, isocetyl isostearate, hexyl laurate, decyl oleate, fatty acids (C10-30) (cholesteryl/lanosyl) teryl), lauryl lactate, octyldodecyl lactate, lanolin acetate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, lanolin derivatives, octyldodecyl myristate, glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, pentaerythritol tetraisostearate, dimer dilinoleyl dimer dilinoleate, di(isostearyl/phytosteryl) dilinoleate, etc.

The content of the oily component in the second agent is not particularly limited, but is preferably 0.1 to 60% by mass. The lower limit of the oily component is more preferably 1% by mass or more, and even more preferably 5% by mass or more. The upper limit of the oily component is more preferably 50% by mass or less, and even more preferably 40% by mass or less.

In the second agent, the ratio (C/D2) of the content of the surfactant (C) to the oil component (D2) is not particularly limited, but is preferably 0.01 to 5. The lower limit of C/D2 is more preferably 0.02 or more, and even more preferably 0.05 or more. The upper limit of C/D2 is more preferably 3 or less, even more preferably 2 or less, and particularly preferably 1 or less.

The pH of the second agent in the hair treatment composition of the present invention is not particularly limited, but is preferably 4 to 7. The pH of the second agent is measured at 25°C when the second agent is dissolved in water at a concentration of 10% by mass.

The state of the solution of the second agent (form) is not particularly limited, but it is preferably in cream form. By making it in cream form, the second agent is easier to apply to hair, and can be applied evenly to the entire hair. This further enhances the effect of the present invention, which is to provide a uniform treatment effect to the entire hair.

[Other ingredients]
In addition to the above-mentioned components, other components may be blended, if necessary, in the first or second agent in the hair treatment composition of the present invention.
Examples of the other components include water such as purified water, solvents, polymeric compounds, sugars, preservatives, chelating agents, stabilizers, pH adjusters, plant extracts, herbal extracts, vitamins, flavorings, antioxidants, and ultraviolet absorbing agents. These other components may be used alone or in combination of two or more.
It is also possible to add the above-mentioned components to the first and second agents together.

Examples of the solvent include organic solvents. Examples of the organic solvent include ethanol, isopropanol, benzyl alcohol, benzyloxyethanol, etc. These solvents may be used alone or in combination of two or more.
The content of the solvent is not particularly limited, but is preferably 0.1 to 10% by mass relative to the first or second agent.

The above-mentioned polymeric compounds include nonionic polymers, anionic polymers, cationic polymers, and amphoteric polymers. The weight-average molecular weight of the polymeric compounds can be 100,000 or more.

Examples of nonionic polymers include hydroxyethyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, methyl cellulose, dextrin, galactan, pullulan, highly polymerized polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, vinylpyrrolidone/vinyl acetate copolymer, vinylpyrrolidone/vinyl acetate/vinyl propionate copolymer (e.g., BASF, trade name "Ruviscol", etc.), dimethylhydantoin formaldehyde resin, poly(meth)acrylic acid, (meth)acrylic acid copolymer, poly(meth)acrylic acid ester, (meth)acrylic acid ester copolymer, poly(meth)acrylamide, (meth)acrylic acid amide copolymer, etc. These may be used alone or in combination of two or more.
The content of the nonionic polymer is not particularly limited, but is preferably 0.01 to 3% by mass relative to the first or second agent.

Examples of anionic polymers include xanthan gum, carrageenan, sodium alginate, gum arabic, pectin, and carboxyvinyl polymers. These may be used alone or in combination of two or more.
The content of the anionic polymer is not particularly limited, but is preferably 0.01 to 3% by mass relative to the first or second agent.

Examples of cationic polymers include cationic celluloses such as O-[2-hydroxy-3-(trimethylammonio)propyl] hydroxyethyl cellulose chloride, O-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydroxyethyl cellulose chloride, and hydroxyethyl cellulose dimethyl diallyl ammonium chloride; cationic guar gums such as O-[2-hydroxy-3-(trimethylammonio)propyl] guar gum chloride; cationic polysaccharides obtained by cationizing polysaccharides such as cellulose derivatives, natural gums, starches, and dextran, such as cationic dextran chloride hydroxypropyl trimethylammonium ether; N-[2-hydroxy-3-(trimethylammonio)propyl] hydrolyzed casein 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 keratin, N-[2-hydroxy-3-(trimethylammonio)propyl] chloride hydrolyzed wheat protein, N-[2-hydroxy-3-(trimethylammonio)propyl] chloride hydrolyzed conchiolin protein, N-[2-hydroxy-3-(stearyldimethylammonio)propyl] chloride hydrolyzed keratin, N-[2-hydroxy-3-(stearyldimethylammonio)propyl] chloride hydrolyzed collagen, salt N-[2-hydroxy-3-(stearyldimethylammonio)propyl] chloride hydrolyzed silk, N-[2-hydroxy-3-(stearyldimethylammonio)propyl] chloride hydrolyzed casein, N-[2-hydroxy-3-(stearyldimethylammonio)propyl] chloride hydrolyzed wheat protein, N-[2-hydroxy-3-(stearyldimethylammonio)propyl] chloride hydrolyzed conchiolin protein, N-[2-hydroxy-3-(lauryldimethylammonio)propyl] chloride [2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed keratin, chloride N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed collagen, chloride N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed silk, chloride N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed casein, chloride N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed wheat protein, chloride N-[2-hydroxy-3-(lauryldimethylammonio)propyl] hydrolyzed nmonio)propyl] hydrolyzed conchiolin, chloride N-[2-hydroxy-3-(coconut alkyl dimethylammonio)propyl] hydrolyzed soy protein, chloride N-[2-hydroxy-3-(coconut alkyl dimethylammonio)propyl] hydrolyzed casein, chloride N-[2-hydroxy-3-(coconut alkyl dimethylammonio)propyl] hydrolyzed collagen, chloride N-[2-hydroxy-3-(coconut alkyl dimethylammonio)propyl] hydrolyzed silk, chloride N-[ Cationic hydrolyzed proteins obtained by cationizing hydrolyzed proteins such as 2-hydroxy-3-(coconut alkyl dimethylammonio) propyl] hydrolyzed keratin, N-chloride [2-hydroxy-3-(coconut alkyl dimethylammonio) propyl] hydrolyzed conchiolin, etc.; cationized vinyl or acrylic polymers such as dimethyldiallylammonium chloride-acrylamide copolymer, β-methacryloxyethyltrimethylammonium-acrylamide copolymer, vinylpyrrolidone-N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate, polychlorinated dimethylmethylene piperidinium; polyglycol polyamine condensates such as N,N-dimethylaminoethyl methacrylic acid diethyl sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate; dimethyl adipionate-aminohydroxypropyl diethyl triamine copolymer; aminoethylaminopropyl-methyl polysiloxane copolymer, etc. Among these, dimethyldiallylammonium chloride-acrylamide copolymer, etc. are preferred. These cationic polymers may be used alone or in combination of two or more kinds.
The content of the cationic polymer is not particularly limited, but is preferably 0.01 to 3% by mass relative to the first or second agent.

Examples of amphoteric polymers include N-methacryloylethyl N,N-dimethylammonium α-N-methylcarboxybetaine-butyl methacrylate copolymer (trade name: Yukaformer AM-75; manufactured by Mitsubishi Chemical Corporation), hydroxypropyl acrylate-butylaminoethyl methacrylate-octylamide acrylate copolymer (trade name: Amphomer 28-4910; manufactured by National Starch Co.), dimethyldiallylammonium chloride-acrylic acid copolymer (trade name: Mercoat 280, 295; manufactured by Ondeo Nalco), dimethyldiallylammonium chloride-acrylamide-acrylic acid terpolymer (trade name: Mercoat Plus 3330, 3331; manufactured by Ondeo Nalco), acrylic acid-methyl acrylate-methacrylamidopropyltrimethylammonium chloride copolymer (trade name: Mercoat 2001; manufactured by Ondeo Nalco), and the like. These may be used alone or in combination of two or more kinds.
The content of the amphoteric polymer is not particularly limited, but is preferably 0.01 to 3% by mass relative to the first or second agent.

Examples of the sugars include trehalose, sorbitol, maltose, glycosyltrehalose, and N-acetylglucosamine. These may be used alone or in combination of two or more.

Examples of the preservatives include paraben, methylparaben, sodium benzoate, phenoxyethanol, etc. These may be used alone or in combination of two or more.

Examples of the chelating agent include edetic acid (ethylenediaminetetraacetic acid (EDTA)) and its salts, diethylenetriaminepentaacetic acid and its salts, and hydroxyethanediphosphonic acid (etidronic acid, HEDP) and its salts. These may be used alone or in combination of two or more.

Examples of the stabilizers include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, and tannic acid. These may be used alone or in combination of two or more.

Examples of the pH adjusters include malic acid, pyrrolidone carboxylic acid (PCA), succinic acid, citric acid, taurine, glutamic acid, tartaric acid, lactic acid, and arginine. These may be used alone or in combination of two or more.

Examples of the antioxidant include ascorbic acid, tocopherol, tocopherol acetate, and sulfites. These may be used alone or in combination of two or more.

[Hair treatment method]
The hair treatment method of the present invention is a hair treatment method for treatment in which a first agent and a second agent are applied to hair in layers, the first agent containing (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms, and the second agent containing (C) a surfactant and (D2) an oily component. When the oily component (D1) is contained, the ratio ((A+B)/D1) of the sum of the content of the component (A) and the content of the component (B) to the content of the component (D1) is 0.05 or more, and the ratio (A/B) of the content of the component (A) to the content of the component (B) is 0.025 to 50.

The hair treatment method for treatment of the present invention is a hair treatment method for adjusting or improving the conditioning of hair. It is preferable to include a step of washing the hair with a hair wash composition before the step of applying the first and second agents to the hair. This allows the effects of the present invention to be more effectively exhibited.

Applying to hair means the act of attaching the product to the hair, for example by applying it with a brush, comb, or gloved hands.

The hair treatment method of the present invention is characterized in that the first and second agents are applied to the hair in layers. In this case, it is preferable to apply the first agent to the hair before the second agent. This allows the first agent to better exert its effect of spreading the second agent over the entire hair and its effect of removing the oily components of the second agent. This further enhances the effect of the present invention, which is to provide a uniform treatment effect over the entire hair. It also further enhances the effect of improving the moisturizing feeling and smoothness of the hair.

The amount of the first and second agents to be applied is not particularly limited, but is determined appropriately depending on the length of the hair. For example, in the case of short hair (length not reaching the shoulders), the amount of the first agent to be applied is 4 to 8 g, and the amount of the second agent to be applied is 4 to 8 g. For example, in the case of long hair (length reaching the shoulders), the amount of the first agent to be applied is 12 to 16 g, and the amount of the second agent to be applied is 12 to 16 g.

The present invention will be described in detail below with reference to examples, but the scope of the present invention is not limited to these examples.

[Preparation of hair treatment composition]
The first and second agents of Examples 1 to 30 and Comparative Examples 1 to 8 were prepared according to the formulations shown in Tables 1 to 4. The following raw materials were used for the dimethyl silicone oils in the tables.
*1: "DOWSIL BY11-031" (Toray Dow Corning Silicone Co., Ltd., polymerization degree 2000 or more)
*2: "X-21-5613" (manufactured by Shin-Etsu Chemical Co., Ltd., polymerization degree 2000 or more)
*3: "BELSIL DM100" (manufactured by Wacker Asahi Kasei Silicone Co., Ltd., degree of polymerization less than 2000)
*4: "YF3800A" (manufactured by Momentive Performance Materials Japan, polymerization degree less than 2000)

[Preparation of damaged hair bundle]
Hair bundle samples (same human hair, hair diameter: 75 to 95 micrometers) were treated with "Promaster EX LT" (a bleaching agent manufactured by Hoyu Corporation) at 30°C for 30 minutes, then rinsed with water, shampooed, and dried with a hair dryer (bleaching treatment). Damaged hair bundles were prepared by performing the bleaching treatment.

[Hair treatment with hair treatment composition]
3 g of the first agent of Examples 1, 2, 4-30 and Comparative Examples 1-6 was evenly applied to the entire damaged hair bundle of 10 g prepared as described above. Then, 3 g of the second agent was evenly applied to the entire damaged hair bundle and washed with water. After rinsing off the second agent, the hair bundle was towel-dried and then dried with a hair dryer to obtain a treated hair bundle.
In Example 3, the order of the treatment with the first agent and the treatment with the second agent was reversed, and the treatment with the second agent was performed first, followed by the treatment with the first agent. The treatment conditions for the first agent and the second agent were not changed.
For Comparative Example 7, 3 g of the first agent and 3 g of the second agent were thoroughly mixed, and the entire amount was evenly applied to the entire damaged hair bundle, followed by rinsing with water.
In Comparative Example 8, the first agent was washed away by washing with water before applying the second agent.

[Evaluation method]
The treated hair strands treated with the hair treatment compositions (first and second agents) of Examples 1 to 30 and Comparative Examples 1 to 8 were evaluated for the treatment effect of evenness, moisturizing feel and smoothness. The evaluation methods are as follows.

<Uniform treatment effect>
The uniformity of the treatment effect was evaluated as follows in a sensory test by 10 panelists who are experts in hair feel: When the 10 panelists ran their fingers through the entire treated hair bundle, they selected either "the treated hair as a whole has a similar feel" or "there are some parts of the treated hair that have a different feel", and when 9 or more panelists chose "the treated hair as a whole has a similar feel", they were given a rating of "5", when 7-8 panelists chose a rating of "4", when 5-6 panelists chose a rating of "3", when 3-4 panelists chose a rating of "2", and when 2 or less panelists chose a rating of "1".
The evaluation results are shown in the "Uniformity" section of Tables 1 to 4.

<Moisturizing feeling of hair>
The moisturizing feel of the hair was evaluated by a sensory test conducted by 10 panelists who are experts in hair feel, as follows: The 10 panelists compared the damaged hair bundle with the treated hair bundle, and scored them according to the following three-level evaluation criteria: An average score of the 10 panelists was 2.8 or more, given a rating of "5", 2.5 or more but less than 2.8, given a rating of "4", 2.0 or more but less than 2.5, given a rating of "3", 1.5 or more but less than 2.0, given a rating of "2", and less than 1.5, given a rating of "1".
(Evaluation Criteria)
3: The feeling of moisture was greatly improved.
2: Improved moisturizing feeling.
1: Moisture sensation slightly improved.
The evaluation results are shown in the "Moisturizing Feeling" section of Tables 1 to 4.

<Hair that feels smooth>
The feel of hair was evaluated by a sensory test conducted by 10 panelists who are experts in hair feel, as follows: The 10 panelists compared the damaged hair bundle with the treated hair bundle, and rated it according to the following three-level evaluation criteria: An average of the 10 panelists' ratings of 2.8 or more was given a "5", 2.5 or more but less than 2.8 was given a "4", 2.0 or more but less than 2.5 was given a "3", 1.5 or more but less than 2.0 was given a "2", and less than 1.5 was given a "1".
(Evaluation Criteria)
3: The smoothness of the hair was greatly improved.
2: The smoothness of the hair improved.
1: The smoothness of the hair was slightly improved.
The evaluation results are shown in the section "Finger Run" in Tables 1 to 4.

The effects of the hair treatment composition are discussed with reference to Table 1. Comparing Example 1 with Comparative Examples 1 to 4, it can be seen that the inclusion of (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group in the first agent improves the uniformity of the treatment effect. In addition, the moisturizing feel and smoothness of the hair are also improved.

Comparing Example 1 and Comparative Example 5, if the second agent did not contain the oily component (D2), the moisturizing feeling and smoothness of the hair did not improve. In addition, no treatment effect was obtained, and naturally no uniformity was observed.

Comparing Examples 1 and 4 with Comparative Example 6, it can be seen that as "{(A) + (B)}/(D1)" increases, the uniformity of the treatment effect improves.

Comparing Example 1 with Comparative Examples 7 and 8, when the first and second agents were mixed and then applied to the hair, the effect of the present invention was not obtained. Also, when the first agent was washed off before the application of the second agent, the effect of the present invention was not obtained. It was found that the second agent spread evenly over the entire hair by applying the first and second agents on top of each other on the hair.
Comparing Example 1 and Example 3, it was found that the order of application of the first agent and the second agent was better when the first agent was applied first and then the second agent. It can be said that the effect of spreading the second agent over the entire hair is improved by applying the first agent first.

Comparing Example 1 and Example 2, it was found that the first agent provided a more uniform treatment effect when applied to the hair in foam form than when applied in liquid form.

With reference to Table 2, the types of (A) nonionic surfactants and (B) ionic surfactants having only one hydrocarbon group and the effects of the present invention will be examined. Comparing Examples 1 and 5 to 9, excellent effects were observed with all nonionic surfactants. Further examination showed that excellent effects were observed when the HLB was 14 or higher. Also, particularly excellent effects were observed with polyglycerin fatty acid esters and polyoxyethylene sorbitan fatty acid esters.

Comparing Examples 1 and 10 to 13, (B) all of the ionic surfactants having only one hydrocarbon group were found to be effective. Anionic surfactants and amphoteric surfactants were found to be more effective than cationic surfactants, with amphoteric surfactants being particularly effective.

Referring to Table 3, the effects of the present invention will be examined with respect to the amount of the oil component (D1) in the first agent, the nonionic surfactant (A), and the ionic surfactant (B) having only one hydrocarbon group added. Comparing Examples 1 and 14, it can be seen that blending the amino-modified silicone (d1) in the first agent improves the uniformity of the treatment effect and the moisturizing feeling.

Comparing Examples 1, 15, and 16, it was found that an excellent effect was achieved by setting the content of (A) the nonionic surfactant to 0.05 to 3 mass %. Comparing Examples 1, 17, and 18, it was found that an excellent effect was achieved by setting the content of (B) the ionic surfactant having only one hydrocarbon group to 0.2 to 1.5 mass %.
Furthermore, comparing Examples 1, 19, and 20, excellent effects were observed when the content ratio (A/B) of (A) the nonionic surfactant to (B) the ionic surfactant having only one hydrocarbon group was set to 0.025 to 50.

The effects of the present invention on the type of oily component in the second agent are examined with reference to Table 4. Comparing Examples 1 and 21 to 23, it is found that the use of highly polymerized dimethyl silicone oil (dimethicone or dimethiconol) improves the moisturizing feel and smoothness of the fingers.
Furthermore, when Example 1 is compared with Example 24, it is evident that the moist feeling is improved by using amodimethicone.

Comparing Examples 1, 25, and 26, it can be seen that the combined use of (d1) amino-modified silicone and (d2) dimethyl silicone oil improves the uniformity of the treatment effect, moisturizing feel, and smoothness of the hair.
Furthermore, comparing Examples 25 to 30, it can be seen that the incorporation of (d1) amino-modified silicone or (d2) dimethyl silicone oil improves the uniformity of the treatment effect. Furthermore, the incorporation of (d1) amino-modified silicone significantly improves the uniformity of the treatment effect, and also significantly improves the moisturizing feeling.

[Prescription Example]
The first agent A1 shown in Table 5, the first agent A2 shown in Table 6, and the first agent A3 shown in Table 7 were prepared. The second agent B1 shown in Table 8 and the second agent B2 shown in Table 9 were also prepared.

As shown in Table 10, the hair treatment compositions of Formulation Examples 1 to 6 were prepared by combining the first agents described in Tables 5 to 7 and the second agents described in Tables 8 and 9. Then, the hair treatment compositions of Formulation Examples 1 to 6 were used to evaluate damaged hair strands in the same manner as in Example 1.

Damaged hair strands treated with the hair treatment compositions of Formulation Examples 1 to 6 achieved excellent results in terms of the evaluation of the evenness of the treatment effect, the moisturizing feel, and the ease of running your fingers through the hair.

The hair treatment composition of the present invention can be used on human body hair, such as head hair, beard, eyebrows, and leg hair. It may also be used on the body hair of animals, such as pets.

The hair treatment composition of the present invention can be used in beauty salons or barber shops. It can also be used for self-treatment at home.

The hair treatment method of the present invention can be used on human body hair, such as head hair, beard, eyebrows, and leg hair. It can also be used on the body hair of animals, such as pets.

The hair treatment method of the present invention can be used in beauty salons or barber shops. It can also be used for self-treatment at home.

Claims (7)

A hair treatment composition for treatment comprising a first agent and a second agent, the first agent and the second agent being applied to hair in a layered manner,
The first agent contains (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms,
The component (B) is an amphoteric surfactant,
when the composition further contains an oil component (D1), the ratio ((A+B)/D1) of the content of the component (D1) to the sum of the content of the component (A) and the content of the component (B) is 0.05 or more,
The ratio (A/B) of the content of the (A) component to the content of the (B) component is 0.025 to 50,
The second agent contains (C) a surfactant and (D2) an oil component,
A hair treatment composition, comprising applying the first agent and then applying the second agent. A hair treatment composition for treatment comprising a first agent and a second agent, the first agent and the second agent being applied to hair in a layered manner,
The first agent contains (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms,
The component (B) is an amphoteric surfactant,
when the composition further contains an oil component (D1), the ratio ((A+B)/D1) of the content of the component (D1) to the sum of the content of the component (A) and the content of the component (B) is 0.05 or more,
The ratio (A/B) of the content of the (A) component to the content of the (B) component is 0.025 to 50;
The second agent contains (C) a surfactant and (D2) an oil component,
The hair treatment composition is characterized in that the first agent is in the form of a foam when applied to hair. A hair treatment composition for treatment comprising a first agent and a second agent, the first agent and the second agent being applied to hair in a layered manner,
The first agent contains (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms,
The component (B) is an amphoteric surfactant,
when the composition further contains an oil component (D1), the ratio ((A+B)/D1) of the content of the component (D1) to the sum of the content of the component (A) and the content of the component (B) is 0.05 or more,
The ratio (A/B) of the content of the (A) component to the content of the (B) component is 0.025 to 50,
The second agent contains (C) a surfactant and (D2) an oil component,
1. A hair treatment composition, wherein the component (D1) in the first agent contains (d1) an amino-modified silicone. A hair treatment composition for treatment comprising a first agent and a second agent, the first agent and the second agent being applied to hair in a layered manner,
The first agent contains (A) a nonionic surfactant and (B) an ionic surfactant having only one hydrocarbon group having 8 or more carbon atoms,
The component (B) is an amphoteric surfactant,
when the composition further contains an oil component (D1), the ratio ((A+B)/D1) of the content of the component (D1) to the sum of the content of the component (A) and the content of the component (B) is 0.05 or more,
The ratio (A/B) of the content of the (A) component to the content of the (B) component is 0.025 to 50;
The second agent contains (C) a surfactant and (D2) an oil component,
1. A hair treatment composition, comprising: the component (D2) in the second agent containing (d1) an amino-modified silicone and (d2) a dimethyl silicone oil. The hair treatment composition according to any one of claims 1 to 4, characterized in that the content of component (B) is 0.1% by mass or more and 2% by mass or less. The hair treatment composition according to any one of claims 1 to 5, characterized in that component (A) is a nonionic surfactant with an HLB of 14 or more. A hair treatment method for treatment, comprising applying the hair treatment composition described in any one of claims 1 to 6 to hair.