JP7733966B2 - Multi-drug hair treatment agent and method of use thereof - Google Patents

Description

The present invention relates to a multi-component hair treatment agent that can change the texture of hair, such as softness, during treatment, and a method for using the same.

With regard to hair treatments and other hair treatment agents, not only single-component products but also multi-component products that combine multiple components with different formulations are known (e.g., Patent Document 1).

JP 2019-89814 A

In the case of multi-component hair treatments in which the first and second components are applied to the hair in that order, for example, if it were possible to change the texture of the hair, such as its softness, between the application of the first and second components, it is expected that expectations for improved hair repair and other finished results would increase. In particular, in beauty salons, if such a change in texture could be achieved during hair treatment, it is likely to raise expectations for both the hairdresser and the patient, and it would be desirable to provide a multi-component hair treatment that has the above-mentioned ability to change texture.

The present invention was made in consideration of the above circumstances, and its purpose is to provide a multi-component hair treatment agent that can change the texture of hair, such as softness, during treatment, and a method for using the same.

The multi-component hair treatment composition of the present invention contains at least a first component and a second component, and is applied to the hair in the order of the first component and the second component. The first component is an oil-in-water emulsion containing a higher alcohol and a cationic surfactant, and the second component is an oil-in-water emulsion containing a higher alcohol, a cationic surfactant, and at least one hydroxyalkyl cellulose (A) selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl ethyl cellulose, and hydroxypropyl methyl cellulose.

Furthermore, a method of using the multi-component hair treatment composition of the present invention is characterized in that, when using the multi-component hair treatment composition of the present invention, the first component is applied to wet hair, and then the second component is applied to the hair without rinsing off the first component.

The present invention provides a multi-component hair treatment agent that can change the texture of hair, such as softness, during treatment, and a method for using the same.

The multi-component hair treatment agent of the present invention is composed of a first component, which is an oil-in-water emulsion containing a higher alcohol and a cationic surfactant, and a second component, which is an oil-in-water emulsion containing a higher alcohol, a cationic surfactant, and at least one hydroxyalkyl cellulose (A) selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl ethyl cellulose, and hydroxypropyl methyl cellulose. By applying the first component to wet hair and then over-applying the second component without rinsing it off, it is possible to change the texture of the hair, such as its softness, from the state it was in after application of the first component.

The present invention will be described below based on an embodiment of the present invention.

[First Agent]
The first agent in the multi-component hair treatment composition of this embodiment is an oil-in-water emulsion containing a higher alcohol and a cationic surfactant.

Examples of higher alcohols that can be incorporated into the first agent include alcohols with 12 to 22 carbon atoms, such as cetanol, isocetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, octyldodecanol, and myristyl alcohol. The first agent may contain only one of these higher alcohols, or two or more of them may be used in combination.

There are no particular restrictions on the amount of higher alcohol in the first agent, so long as it is an amount that can turn the first agent into an oil-in-water emulsion. However, for example, if the first agent is to be in the form of a cream, which is a preferred dosage form, the amount is preferably 2% by mass or more, more preferably 4% by mass or more, and preferably 10% by mass or less, more preferably 8% by mass or less.

Examples of cationic surfactants that can be incorporated into the first agent include quaternary ammonium salts with alkyl chains containing 12 to 22 carbon atoms and tertiary amine salts with alkyl chains containing 12 to 22 carbon atoms. Examples of such salts include halogen salts and alkyl sulfates.

Examples of quaternary ammonium salts having an alkyl chain containing 12 to 22 carbon atoms include mono-long-chain alkyl quaternary ammonium salts (stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, etc.), di-long-chain alkyl quaternary ammonium salts (dicocyldimethylammonium chloride, etc.), and ethylene oxide (E.O.) adduct quaternary ammonium salts. Examples of tertiary amine salts having an alkyl chain containing 12 to 22 carbon atoms include fatty acid amidoamines, polyoxyethylene alkylamines (polyoxyethylene oleylamine, etc.), and polyoxyethylene fatty acid amides.

The first agent may contain only one of these cationic surfactants, or two or more of them may be used in combination.

There are no particular restrictions on the amount of cationic surfactant in the first agent, so long as it is an amount that can turn the first agent into an oil-in-water emulsion. However, for example, if the first agent is to be in the form of a cream, which is a preferred dosage form, the amount is preferably 1% by mass or more, more preferably 2% by mass or more, and is 5% by mass or less, preferably 4% by mass or less, and more preferably 3% by mass or less.

The first agent is an oil-in-water emulsion and contains water. There are no particular restrictions on the amount of water in the first agent, as long as it is within a range that results in the first agent being an oil-in-water emulsion, but for example, it is 60 to 90% by mass.

The first agent can also contain any of the various ingredients typically found in hair treatment agents. Examples of such optional ingredients include silicones, nonionic surfactants, polyhydric alcohols, ester oils, sugars, fats and oils, fatty acids, hydrocarbons, waxes, polymeric compounds, lower alcohols, amino acids, animal and plant oil extracts, substances derived from microorganisms, inorganic compounds, fragrances, and preservatives.

The first agent may contain hydroxyalkyl cellulose (A) and/or tamarind gum, but in this case, the amount of hydroxyalkyl cellulose (A) should be less than 0.02% by mass, and the amount of tamarind gum should be less than 0.1% by mass.

Examples of silicones include highly polymerized methylpolysiloxane, dimethiconol, polyether-modified silicones (such as polyoxyethylene-methylpolysiloxane copolymer and polyoxyethylene-polyoxypropylene-methylpolysiloxane copolymer), polyglycerin-modified silicones (such as polyglyceryl-3 disiloxane dimethicone), amino-modified silicones (such as aminoethylaminopropylsiloxane-dimethylsiloxane copolymer), and phenyl-modified silicones (such as methylphenylpolysiloxane). The amount of silicone in the first agent is, for example, 0.1 to 20% by mass.

Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol tetra fatty acid esters, glycerin fatty acid esters, alkyl glucosides, sorbitan fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, and sucrose fatty acid esters. The amount of nonionic surfactant in the first agent is, for example, 0.05 to 5% by mass.

Examples of polyhydric alcohols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, and butylene glycol. The amount of polyhydric alcohol in the first agent is, for example, 0.05 to 10% by mass or less.

Examples of ester oils include esters of straight-chain fatty acids such as isopropyl myristate and lower alcohols, esters of straight-chain fatty acids and higher straight-chain alcohols such as cetyl caprylate, esters of straight-chain fatty acids and branched alcohols such as 2-ethylhexyl palmitate, esters of branched fatty acids and lower alcohols such as isopropyl isostearate, esters of branched fatty acids and higher straight-chain alcohols such as cetyl ethylhexanoate, esters of fatty acids and polyhydric alcohols such as propylene glycol dicaprylate, and esters of branched fatty acids and branched alcohols such as 2-ethylhexyl isononanoate. The amount of ester oil in the first agent is, for example, 0.01 to 20% by mass or less.

The pH of the first agent is, for example, 3 to 11.

The first agent may be in the form of, for example, a liquid, lotion, cream, or gel.

When the first agent is in the form of a cream, which is a suitable formulation, its viscosity is, for example, 3,000 mPa·s or more and 40,000 mPa·s or less. The viscosity of the first and second agents referred to in this specification is the value measured after 60 seconds at 25°C using a Brookfield viscometer with a rotor selected according to the viscosity.

[Second Agent]
The second agent in the multi-component hair treatment composition of this embodiment is an oil-in-water emulsion containing a higher alcohol, a cationic surfactant, and a specific hydroxyalkyl cellulose (A).

The higher alcohol for the second agent can be one or more of the same higher alcohols listed above as examples that can be used for the first agent.

There are no particular restrictions on the amount of higher alcohol in the second agent, as long as it is an amount that can turn the second agent into an oil-in-water emulsion. However, for example, if the second agent is to be in the form of a cream, which is a preferred dosage form, the amount is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 6% by mass or less, more preferably 4% by mass or less.

The cationic surfactant for the second agent can be one or more of the same cationic surfactants listed above as examples that can be used for the first agent.

There are no particular restrictions on the amount of cationic surfactant in the second agent, as long as it is an amount that can turn the second agent into an oil-in-water emulsion. However, for example, if the second agent is to be in the form of a cream, which is a preferred dosage form, the amount is preferably 0.5% by mass or more, more preferably 1% by mass or more, and is 5% by mass or less, preferably 4% by mass or less, and more preferably 3% by mass or less.

The hydroxyalkyl cellulose (A) that can be incorporated into the second agent is selected from hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl ethyl cellulose, and hydroxypropyl methyl cellulose. Only one of these hydroxyalkyl celluloses (A) may be used, or two or more may be used in combination.

The amount of hydroxyalkyl cellulose (A) in the second agent is preferably 0.02% by mass or more, and more preferably 0.1% by mass or more, from the viewpoint of ensuring a better effect of improving the texture of the hair, such as softness, after application of the second agent compared to the state after application of the first agent. However, if the amount of hydroxyalkyl cellulose (A) in the second agent is too high, there is a risk of the viscosity increasing too much, so the amount of hydroxyalkyl cellulose (A) in the second agent is preferably 1.5% by mass or less, more preferably 1.0% by mass or less, and even more preferably 0.5% by mass or less.

It is preferable to incorporate tamarind gum into the second agent. This allows for greater changes in the texture of the hair, such as softness, after application of the second agent compared to the texture after application of the first agent.

To better ensure the above-mentioned effects of its use, the amount of tamarind gum in the second agent is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. However, since too much tamarind gum in the second agent may result in excessive viscosity, the amount of tamarind gum in the second agent is preferably 2% by mass or less, and more preferably 1.5% by mass or less.

The second agent is an oil-in-water emulsion and contains water. There are no particular restrictions on the amount of water in the second agent, as long as it is within a range that results in the second agent being an oil-in-water emulsion, but for example, it is 60 to 90% by mass.

The second agent can also contain any of the various ingredients typically found in hair treatment agents. Examples of such optional ingredients include silicones, nonionic surfactants, polyhydric alcohols, ester oils, sugars, fats and oils, fatty acids, hydrocarbons, waxes, polymeric compounds, lower alcohols, amino acids, animal and plant oil extracts, substances derived from microorganisms, inorganic compounds, fragrances, and preservatives.

The silicone in the second agent can be one or more of the same silicones listed above as examples that can be used in the first agent. The amount of silicone in the second agent is, for example, 0.1 to 20% by mass.

The nonionic surfactant in the second agent can be one or more of the same nonionic surfactants listed above as examples that can be used in the first agent. The amount of nonionic surfactant in the second agent is, for example, 0.05 to 5% by mass.

The polyhydric alcohol in the second agent can be one or more of the same polyhydric alcohols listed above as examples that can be used in the first agent. The amount of polyhydric alcohol in the second agent is, for example, 0.05 to 10% by mass.

The ester oil in the second agent can be one or more of the same ester oils listed above as examples that can be used in the first agent. The amount of ester oil in the second agent is, for example, 0.1 to 10% by mass.

The pH of the second agent is, for example, 3 to 11.

The second agent can be in the form of, for example, a liquid, lotion, cream, or gel.

When the second agent is in the form of a cream, which is a suitable dosage form, its viscosity is, for example, 3,000 mPa·s or more and 40,000 mPa·s or less.

[Configuration of multi-component hair treatment agent]
The multi-component hair treatment composition according to this embodiment may be composed of only the first and second components, but may also contain one or more other treatment components as necessary.

[Method of using the multi-component hair treatment agent]
The multi-component hair treatment composition according to this embodiment can be used, for example, by applying the first agent to wet hair and then applying the second agent to the hair without rinsing off the first agent (applying it over the first agent). When applying the first agent to the hair and when applying the second agent to the hair, for example, appropriate amounts of the first agent and the second agent can be taken in the hands and applied. Note that if the multi-component hair treatment composition contains other treatment agents in addition to the first and second agents, the second agent is applied to the hair after the application of the first agent, and the other treatment agent is applied to the hair before the application of the first agent or after the application of the second agent.

[Uses of multi-component hair treatment agents]
The multi-component hair treatment composition according to this embodiment can be used as a multi-component hair treatment to be applied to hair after washing with shampoo, and can also be used as a pre-treatment agent, intermediate treatment agent and post-treatment agent for hair transformation treatments such as permanent wave treatment and hair straightening treatment, and as a pre-treatment agent and post-treatment agent for color treatment.

The present invention will be described in detail below based on examples. However, the following examples do not limit the present invention. Note that although the blending amounts of each component of the first agent listed in Table 1 and the second agent listed in Table 2 below are in parts by mass, the parts by mass will be omitted and only the numerical values representing the blending amounts will be shown.

Examples 1 and 2 and Comparative Examples 1 to 4
First, a first agent was prepared using stearyl alcohol, cetanol, stearyltrimethylammonium chloride, dicocoyldimethylammonium chloride, aminoethylaminopropylsiloxane-dimethylsiloxane copolymer emulsion, isopropanol, and purified water according to the composition shown in Table 1. The resulting first agent was an oil-in-water emulsion with a pH of 7.96 and a viscosity of 7060 mPa s.

Next, the second agents of Examples 1 and 2 and Comparative Examples 1 to 4 were prepared using stearyl alcohol, cetanol, stearyltrimethylammonium chloride, dicocoyldimethylammonium chloride, hydroxyethyl cellulose, stearoxyhydroxypropylmethylcellulose, cationized cellulose, tamarind gum, methylpolysiloxane, aminoethylaminopropylsiloxane-dimethylsiloxane copolymer emulsion, dipropylene glycol, 2-ethylhexyl isononanoate, isopropanol, and purified water, with the compositions shown in Table 2. The resulting second agents were all oil-in-water emulsions, with pH and viscosity values shown in Table 2.

These second agents were then combined with the first agent to obtain the multi-agent hair treatment agents of Examples 1 and 2 and Comparative Examples 1 to 4.

For the multi-component hair treatment agents of the Examples and Comparative Examples, the degree of change in hair texture (softness) after applying the first component to hair and then applying the second component (change in hair texture) was evaluated using the following method.

Several hair strands (7g per strand) were taken from the same individual, and each was washed with shampoo and then rinsed with water. 0.2g of the first agent of the multi-component hair treatment product was then taken in the palm of one hand and applied evenly to each strand, followed by 0.2g of the second agent being taken in the palm of one hand and applied evenly over the first agent.

When using the multi-component hair treatment agents of the Examples and Comparative Examples, six expert evaluators evaluated the degree of change in hair texture (softness) after application of the second component compared to the texture after application of the first component, and assigned a score according to the following criteria:

<Evaluation criteria>
Hair softness is significantly improved after applying the second agent: 3 points
Hair feels softer after applying the second agent: 2 points
After applying the second agent, hair softness is slightly improved: 1 point
There was almost no change in hair softness between application of the first and second agents: 0 points.

The scores of all evaluators were then totaled to evaluate the ability of each multi-component hair treatment product to change the texture of hair after application of the second component compared to application of the first component. The evaluation results are also shown in Table 2.

The "aminoethylaminopropylsiloxane-dimethylsiloxane copolymer emulsion" in Table 1 is an aqueous dispersion containing 40% by mass of aminoethylaminopropylsiloxane-dimethylsiloxane copolymer, an amino-modified silicone. Furthermore, the "cationized cellulose" in Table 2 is O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride (polyquaternium-10).

As shown in Table 2, the multi-component hair treatment agents of Examples 1 and 2, which have a second agent containing hydroxyalkyl cellulose (A) along with a higher alcohol and a cationic surfactant, were able to effectively change the texture (softness) of hair after application of the second agent from that after application of the first agent. Furthermore, the multi-component hair treatment agent of Example 1, which contained tamarind gum in addition to hydroxyalkyl cellulose (A) in the second agent, showed a greater change in texture after application of the second agent from that after application of the first agent than the multi-component hair treatment agent of Example 2, which did not contain tamarind gum in the second agent.

On the other hand, the multi-component hair treatment agent of Comparative Example 1, which had a second agent with the same composition as the first agent; the multi-component hair treatment agent of Comparative Example 2, which had a second agent containing tamarind gum but no hydroxyalkyl cellulose (A); the multi-component hair treatment agent of Comparative Example 3, which had a second agent containing stearoxyhydroxypropylmethylcellulose instead of hydroxyalkyl cellulose (A); and the multi-component hair treatment agent of Comparative Example 4, which had a second agent containing cationic cellulose instead of hydroxyalkyl cellulose (A), showed only a small change in hair texture after application of the second agent compared to application of the first agent, and were inferior to the multi-component hair treatment agents of Examples 1 and 2.

Claims (3)

A multi-component hair treatment agent comprising at least a first agent and a second agent, wherein the first agent is applied, and then the second agent is applied to hair without rinsing off the first agent,
the first agent is an oil-in-water emulsion containing a higher alcohol and a cationic surfactant, but not containing at least one hydroxyalkyl cellulose (A) selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl ethyl cellulose, and hydroxypropyl methyl cellulose ;
the second agent is an oil-in-water emulsion containing a higher alcohol, a cationic surfactant, and at least one hydroxyalkyl cellulose (A) selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl ethyl cellulose, and hydroxypropyl methyl cellulose;
A multi-component hair treatment composition, characterized in that the first and second components contain one or more cationic surfactants selected from the group consisting of stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, di-long-chain alkyl quaternary ammonium salts having an alkyl chain with 12 to 22 carbon atoms, ethylene oxide (E.O.) adduct quaternary ammonium salts having an alkyl chain with 12 to 22 carbon atoms, and tertiary amine salts having an alkyl chain with 12 to 22 carbon atoms. The multi-component hair treatment agent according to claim 1, wherein the second component further contains tamarind gum. A method for using the multi-component hair treatment composition according to claim 1 or 2, comprising:
A method for using a multi-component hair treatment agent, characterized in that the first component is applied to wet hair, and then the second component is applied to the hair without rinsing off the first component.