JP2022180975A - Hair-treating agent - Google Patents

Abstract

To provide a hair-treating agent which can suppress the generation of an unpleasant odor of the hair caused by hair dyeing or decoloring treatment while suppressing deterioration of strength of the hair (firmness/resilience, breaking resistance, combability) due to these hair treatments and further can be stably stored for a long time.SOLUTION: There is provided a hair-treating agent which comprises a carboxylic acid or its salt and an oxidizing agent, where the carboxylic acid is at least one of tartaric acid and malic acid, the hair-treating agent has a pH of 2.0 to 4.0 and the content of a carboxylic acid or its salt is 5.0 mass% or less.SELECTED DRAWING: None

Description

Applied for application of Article 30, Paragraph 2 of the Patent Act. Sample of hair treatment agent distributed by home delivery on June 5, 2020.

TECHNICAL FIELD The present invention relates to a hair treatment agent used in hair treatment such as dyeing treatment and bleaching treatment.

Hair modification treatments such as hair dyeing treatment, bleaching treatment, permanent wave treatment, and curly hair straightening treatment can change the desired lightness and color tone of the hair, but they also reduce the luster and manageability of the hair, resulting in various problems with the hair. damage.

Therefore, hair treatment agents have been proposed to reduce such hair damage. More specifically, an oxidative hair dye containing an alkaline agent containing a carbonate and a specific alkaline chelating agent such as ethylenediaminetetraacetic acid (EDTA) has been proposed. It is described that by using such an oxidative hair dye, it has less irritating odor, is less irritating, imparts good brightness to the hair, and ensures sufficient hair dyeing power (for example, patent Reference 1).

Further, it contains an alkaline agent, an oily component, a surfactant, an oxidizing agent, and a chelating agent, and the chelating agent contains at least one kind of gluconic acid or a salt thereof, and the blending amount is 0.002 to 0.2% by mass. Hair bleaches and oxidative hair dyes have been proposed that are less than By using such a hair bleaching agent and an oxidative hair dyeing agent, the emulsification stability, bleaching power, hair dyeing power, and texture are excellent, and stimulation and damage to the hair during treatment are sufficiently reduced. (see, for example, Patent Document 2).

Also, an oxidizing agent-containing composition used as a hair dye or hair bleaching/destaining agent by mixing with an agent containing an alkaline agent, comprising an oxidizing agent, phenoxyethanol, an aminocarboxylic acid-based chelating agent, and an acid An oxidizing agent-containing composition containing It is also stated that the use of such an oxidizing agent-containing composition can improve formulation stability and oxidizing agent stability (see, for example, Patent Document 3).

Japanese Patent No. 6196753 Japanese Patent No. 5914555 JP 2019-11293 A

However, in the oxidative hair dyes and the like described in Patent Documents 1 and 2, the above-mentioned chelating agent improves hair dyeing and bleaching power while reducing irritation and damage to hair during treatment. Due to these chelating agents, there is a problem that the strength of hair (firmness, stiffness, difficulty of cutting, combability) is lowered in bleaching treatment and the like.

In addition, in the oxidant-containing composition described in Patent Document 3, phenoxyethanol and a specific acid are used in combination to improve the formulation stability of the oxidant-containing composition and the stability of the oxidant. There is a problem that phenoxyethanol and a specific acid lower the strength of hair (tension/strength, difficulty of cutting, combability) in bleaching treatment and the like.

Therefore, the present invention has been made in view of the above problems, and suppresses the deterioration of hair strength (firmness, stiffness, difficulty of cutting, combing) due to hair dyeing treatment and bleaching treatment, and at the same time, To provide a hair treatment agent capable of suppressing generation of an unpleasant odor of hair caused by hair treatment of (1) and capable of being stably stored for a long period of time.

In order to achieve the above object, the hair treatment agent of the present invention comprises a carboxylic acid or a salt thereof and an oxidizing agent, wherein the carboxylic acid is at least one of tartaric acid and malic acid, It is characterized by having a pH of 2.0 to 4.0 and a carboxylic acid or salt thereof content of 5.0% by mass or less.

According to the present invention, it is possible to suppress a decrease in hair strength (tension/strength, difficulty of cutting, combability) due to hair dyeing or bleaching treatment, and at the same time, generate an unpleasant odor of hair caused by these hair treatments. can be suppressed. Moreover, it is possible to provide a hair treatment agent that can be stably stored for a long period of time.

Preferred embodiments of the present invention are described below. In addition, the present invention is not limited to the following embodiments, and can be appropriately modified and applied without changing the gist of the present invention.

The hair treatment agent of the present invention is used as a secondary agent for an oxidative hair dye or bleaching agent, and contains a carboxylic acid or a salt thereof and an oxidizing agent.

(Carboxylic acid or its salt)
As the carboxylic acid or its salt, at least one of tartaric acid and malic acid or its salt is used.

Since these carboxylic acids or their salts are highly reactive with the amino groups of keratin fibers, they permeate into the hair and form an elastic core inside the hair.・It suppresses the deterioration of stiffness, difficulty of cutting, and combability.

In addition, these carboxylic acids or salts thereof cause stimulating sulfur oxidation derived from the oxidation of protein, which is a hair component, or the amino acid of its structural unit, which is secondary to the oxidation reaction of the oxidative hair dye or bleaching agent. Since it can specifically adsorb to a compound and suppress its generation, it is possible to suppress generation of an unpleasant hair odor caused by hair dyeing or bleaching.

In addition, since the hair treatment agent of the present invention contains the above-mentioned carboxylic acid or a salt thereof, for example, when hydrogen peroxide is used as an oxidizing agent, the decomposition of hydrogen peroxide is suppressed. The stability of the hair treatment agent (that is, the stability of the oxidizing agent) is improved.

In the present invention, the amount of the carboxylic acid or its salt is 5.0% by mass or less with respect to the entire hair treatment agent, and the lower limit is preferably 0.001% by mass or more.

This is because if the carboxylic acid or its salt is less than 0.001% by mass, the aforementioned reduction in strength may not be sufficiently suppressed. On the other hand, when the amount is more than 5% by mass, the pH is too low, and it may become difficult to use it as an oxidative hair dye or bleaching agent. As a result, the three-dimensional structure of the hair may be changed and the strength may be lowered. In addition, due to the increase in concentration, the viscosity of the formulation decreases and the stability of emulsification decreases, resulting in non-uniformity of the formulation during use. This is because reaction odors during hair treatment and bleaching treatment and residual odors (unpleasant odors) after hair treatment may occur.

(Oxidant)
The oxidizing agent, which is the main ingredient of the hair treatment agent of the present invention, is not particularly limited as long as it is used in the second agent for hair coloring. Examples include hydrogen peroxide.

Moreover, from the viewpoint of suppressing hair damage and obtaining a sufficient hair dyeing effect, the amount of the oxidizing agent to be added to the entire hair treatment agent is preferably 1.5 to 9.0% by mass.

Moreover, from the viewpoint of suppressing a decrease in hair strength, the content ratio of the carboxylic acid or its salt to the oxidizing agent in the hair treatment agent is preferably 1:0.8 to 1:30000 on a mass basis. .

(salicylic acid)
Moreover, the hair treatment agent of the present invention may contain salicylic acid. By containing this salicylic acid, for example, when hydrogen peroxide is used as an oxidizing agent, the decomposition of hydrogen peroxide is reliably suppressed, and the stability of the hair treatment agent (that is, the stability of the oxidizing agent) is improved. will definitely improve.

In the present invention, the amount of salicylic acid to be added to the entire hair treatment agent is not particularly limited, but is preferably 0.001 to 3.0% by mass. This is because if salicylic acid is less than 0.001% by mass, the stability of the above hair treatment agent may not be sufficiently improved. On the other hand, when it is more than 3.0% by mass, crystallization of salicylic acid itself occurs over time, and stability may decrease.

Also, from the viewpoint of stably blending into the hair treatment agent, the content ratio of carboxylic acid or its salt and salicylic acid in the hair treatment agent should be 1:0.02 to 1:10 on a mass basis. preferable.

From the viewpoint of the stability of the hair treatment agent, the content ratio of salicylic acid and oxidizing agent is preferably 1:8 to 1:30000 on a mass basis.

(solvent)
The solvent (dispersion medium) used in the hair treatment agent of the present invention is not particularly limited, and for example, water is used. It can be included in water at concentrations that are harmless.

The form of the hair treatment agent of the present invention is not limited to a solution, and may be one in which the components added as necessary are suspended or emulsified.

(pH adjuster)
Moreover, the hair treatment agent of the present invention may contain a pH adjuster. This pH adjuster is not particularly limited as long as it is usually used in hair cosmetics. For example, sodium pyrophosphate, phosphoric acid, guanidine carbonate, sodium dihydrogen phosphate, trisodium phosphate, sesquicarbonate, arginine, sodium hydrogen carbonate, sodium carbonate, monoethanolamine, ammonia, 2-amino-2-methyl- 1-propanol, sodium hydroxide, tripotassium citrate, trisodium citrate, and diammonium hydrogen phosphate.

(pH)
The pH of the hair treatment agent of the present invention is set to 2.0 to 4.0 by the pH adjuster. For example, when using hydrogen peroxide as the oxidizing agent, the pH is set between 2.0 and 4.0.

(Preservative)
Moreover, the hair treatment agent of the present invention may contain a preservative. Stability of the hair treatment agent can be obtained by containing the preservative.

Examples of the preservative include benzoic acid, sodium benzoate, dehydroacetic acid, sodium dehydroacetate, paraben, phenoxyethanol, methylisothiazolinone and the like.

The amount of the preservative added to the entire hair treatment agent is preferably 0.01 to 0.3% by mass.

(other ingredients)
The hair treatment agent of the present invention may contain other ingredients such as oily ingredients (e.g., sphingolipids, ceramides, cholesterol derivatives, phytosterol derivatives, phospholipids, lanolin fatty acid derivatives, Perfluoropolyether, etc.), vegetable oils (eg, olive oil, shea butter, macadamia nut oil, etc.), waxes (eg, jojoba seed oil, carnauba wax, candelilla wax, beeswax, etc.), hydrocarbons (eg, liquid paraffin, light liquid isoparaffin, paraffin, microcrystalline wax, squalane, petrolatum, isododecane, isohexadecane, etc.), higher fatty acids (e.g., myristic acid, oleic acid, stearic acid, isostearic acid, branched fatty acids (C (carbon number) 14-28), hydroxy stearic acid, etc.), alcohols (e.g., cetanol, isostearyl alcohol, oleyl alcohol, hydrogenated rapeseed oil alcohol, cholesterol, sitosterol, 1,3-butylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, 1, 2-hexanediol, etc.), sugars and derivatives thereof (e.g., glucose, sucrose, D-sorbitol, maltose, trehalose, polyoxypropylene methyl glucoside, glyceryl glucoside, etc.), esters (e.g., isopropyl myristate, palmitic acid Cetyl, ethylhexyl palmitate, octyldodecyl oleate, glyceryl triisostearate, diethoxyethyl succinate, cetyl lactate, octyldodecyl lanolin fatty acid, etc.), silicones (e.g., dimethyl silicone, methylphenyl silicone, cyclic dimethyl silicone, polyether) modified silicone, alkyl-modified silicone, amino-modified silicone, dimethiconol, PCA dimethicone, etc.), amino acids and their derivatives (e.g., glutamic acid, aspartic acid, glycine, serine, methionine, trimethylglycine, sodium polyaspartate, sodium lysine dilauroyl glutamate) , N-lauroyl-L-lysine, etc.), PPT and proteins (for example, hydrolyzed silk, hydrolyzed wheat, hydrolyzed soybean, hydrolyzed collagen, hydrolyzed keratin, silylated hydrolyzed silk, silylated hydrolyzed wheat, cationized hydrolyzed silk, cationized hydrolyzed collagen, keratin, etc.), natural polymers (e.g. Ginate, mannan, gum arabic, tamarind gum, chitosan, carrageenan, mucin, shellac, hyaluronic acid, cationized hyaluronic acid, xanthan gum, dextrin, hydroxyethyl cellulose, cationized cellulose, guar gum, cationized guar gum, honey, etc.), Synthetic polymers (e.g., anionic polymers, cationic polymers, nonionic polymers, amphoteric polymers, polyethylene glycol, polypropylene glycol, polyoxypropylene diglyceryl ether, etc.), other anionic surfactants (e.g., , alkyl ether carboxylates, N-acyl glutamic acid, N-acyl methyl taurate salts, alkyl sulfosuccinates, alkyl ether sulfates such as sodium lauryl sulfate, etc.), other cationic surfactants (e.g., alkylamine salts, fatty acid amide amine salts, etc.), amphoteric surfactants (e.g., glycine-type amphoteric surfactants, aminopropionic acid-type amphoteric surfactants, aminoacetic acid betaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, etc.), nonionic surfactants (for example, polyoxyethylene alkyl ethers such as polyoxyethylene cetyl ether and polyoxyethylene lauryl ether, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, alkyl glucosides, new oil-type glyceryl monostearate etc.), dyes (e.g., tar pigments, natural pigments, etc.), plant extracts (e.g., chamomile extract, comfrey extract, sage extract, rosemary extract, persimmon tannin, tea dry distillation, sodium copper chlorophyllin, etc.), vitamins (e.g., L-ascorbic acid, DL-α-tocopherol, D-panthenol, natural vitamin E, etc.), UV absorbers (e.g., para-aminobenzoic acid, octyl salicylate, 2-ethylhexyl para-methoxycinnamate, ferulic acid, etc.) ), antioxidants (e.g., sodium bisulfite, dibutylhydroxytoluene, etc.), sequestering agents other than the above (e.g., hydroxyethanediphosphonic acid solution, edetate, sodium polyphosphate, phytic acid, etc.), other inorganic Compounds (e.g., titanium oxide, silver, platinum, iron chloride, iron oxide, sodium bromate, hydrogen peroxide, etc.), other organic compounds (e.g., urea, hydroxyethylurea, sodium dl-pyrrolidonecarboxylate, copper gluconate, etc.) ), solvents (e.g. diethylene glycol mono ethyl ether, benzyl alcohol, etc.), propellants (eg, LPG (liquefied petroleum gas), DME (dimethyl ether), nitrogen gas, carbon dioxide gas, etc.), and known cosmetic ingredients such as fragrances.

The treatment agent for hair deformation of the present invention can be in the form of liquid, milk, cream, foam (form at the time of use), mist (form at the time of use), etc. by a known method, and can be in the form of an aerosol. can also be

The present invention will be described below based on examples. The present invention is not limited to these examples, and these examples can be modified and changed based on the spirit of the present invention, and they are not excluded from the scope of the invention. do not have.

(Examples 1 to 56 and Comparative Examples 1 to 30)
<Production of hair treatment agent>
Water (purified water) and each raw material were blended to produce hair treatment agents (second agent) of Examples 1 to 56 and Comparative Examples 1 to 30 having compositions (% by mass) shown in Tables 1 to 6. .

<First agent for decolorization>
Separately from the hair treatment agent of the present invention, a commercially available first agent for bleaching (trade name: Edol Lightener EX) was used as the first agent combined with each hair treatment agent of Examples and Comparative Examples.

<Preparation of hair for sample>
A hair bundle (5 g) consisting of straight hair of 30 cm in length was subjected to two dyeing treatments using a commercially available hair color as a chemical treatment, and further subjected to a permanent wave treatment using a commercially available perm solution. rice field. Thereafter, the treated hair was immersed overnight in an aqueous polyoxyethylene sodium lauryl sulfate solution (5% by mass) maintained at 50° C., and thoroughly washed with water to obtain sample hair.

<Decolorization treatment>
Next, the prepared hair was subjected to the following bleaching treatments (A) to (C).
(A) First, each hair treatment agent (second agent) and first agent of Examples and Comparative Examples were prepared with respect to 5 g of sample hair, and the hair treatment was carried out according to the ratios shown in Tables 1 to 6. A decolorizing agent was prepared by mixing the agent and the first agent.
(B) Next, the prepared bleaching agent was uniformly applied to the entire hair and left for 25 minutes.
(C) After the bleaching treatment for 25 minutes, the bleaching agent was washed away, shampoo and treatment were performed, and then the hair was dried using a dryer.

<Evaluation of bleaching power>
A sensory evaluation was carried out on the effect of the above-described hair treatment agent on the feeling of finish after the above-described bleaching treatment on the hair that had been subjected to the above-described bleaching treatment. Specifically, evaluation was performed by 10 expert panelists based on the following evaluation criteria.

Very strong bleaching power: ◎
There is bleaching power: 〇 Slightly weak bleaching power: △
No bleaching power: ×

<Evaluation on finished feeling>
Next, a sensory evaluation was performed on the effect of the above-described hair treatment agent on the hair that had undergone the above-described bleaching treatment on the feeling of finish after drying after the bleaching treatment. Specifically, 10 expert panelists evaluated the three items of (1) combability, (2) difficulty of cutting, and (3) firmness and stiffness. Evaluation criteria for each evaluation item are shown below.

(1) Comb Comb Combability (slippery feeling) when the hair tresses dried after final washing after decolorization treatment were loosened was evaluated according to the following evaluation criteria.
Excellent combability: ◎
Good for combing: ○
Slightly poor combing: △
Poor combing: ×

(2) Firmness and stiffness Firmness and stiffness in a dry state after decolorization were evaluated according to the following evaluation criteria.
There is a lot of firmness and stiffness: ◎
There is firmness and stiffness:○
Slightly lacking firmness and stiffness: △
There is no firmness and stiffness: ×

(3) Hardness to Cut Hardness to cut in a dry state after decolorization was evaluated according to the following evaluation criteria.
When pulling a certain amount of hair, it was difficult to stretch and could not be cut: ◎
When the hair was pulled by a certain amount, it was stretched but could not be cut: ○
When the hair was pulled a certain amount, it was stretched and then cut: △
When I pulled a certain amount of hair, it broke immediately: ×

<Evaluation on stability>
The stability of each hair treatment agent of Examples and Comparative Examples was evaluated according to the following evaluation criteria.
When stored at a constant temperature of 50°C, foaming decomposition (decomposition of hydrogen peroxide) did not occur for 3 months or more: ◎
When stored at a constant temperature of 50 ° C, foaming decomposition (decomposition of hydrogen peroxide) occurred in 2 months or more and less than 3 months: ○
When stored at a constant temperature of 50 ° C., foaming decomposition (decomposition of hydrogen peroxide) occurred in 1 month or more and less than 2 months: △
When stored at a constant temperature of 50 ° C., foaming decomposition (decomposition of hydrogen peroxide) occurred in less than 1 month: ×

<Evaluation on residual odor>
After loosening the dried hair tresses after the final washing of the bleaching treatment, the presence or absence of residual odor was evaluated according to the following evaluation criteria.

No residual odor: ◎
Almost no residual odor: ○
Slight residual odor: △
Strong residual odor: ×

In each of the evaluations described above, "⊚" was evaluated as being particularly excellent, and "○" was evaluated as being excellent. In addition, "△" and "×" were evaluated as insufficient. Tables 1 to 6 show the above results.

As shown in Tables 1 to 4, the hair treatment agents of Examples 1 to 32 containing at least one of tartaric acid and malic acid or salts thereof are compared with Comparative Examples 1 to 6, which contain other acids such as succinic acid. Compared to 8 to 13, 15 to 20, and 22 to 27, it is possible to suppress the decrease in strength (combability, difficulty of cutting, firmness and stiffness) due to bleaching treatment, and unpleasant odor of hair caused by bleaching treatment. It can be seen that the generation of (residual odor) can be suppressed and that stable storage for a long period of time is possible.

Further, as shown in Tables 1 to 6, the hair treatment agents of Examples 1 to 56 containing at least one of tartaric acid and malic acid or salts thereof in an amount of 5.0% by mass or less showed strength (combability, It is possible to suppress the deterioration of the difficulty of cutting, firmness and stiffness), suppress the generation of unpleasant odors (residual odors) of hair caused by bleaching treatment, and allow stable storage for a long period of time. I understand.

On the other hand, in Comparative Examples 29 to 30 containing 8.0% by mass of at least one of tartaric acid and malic acid or a salt thereof, even if sodium pyrophosphate was used, the pH only increased to 1.8, and the pH Since it is too low, the bleaching power is remarkably lowered, and the reduction in the strength (combability, difficulty of cutting, firmness and stiffness) due to the bleaching treatment cannot be suppressed. In addition, it can be seen that the generation of an unpleasant hair odor (residual odor) due to the bleaching treatment cannot be suppressed, making it difficult to store stably for a long period of time.

Further, as shown in Table 5, the hair treatment agent of Example 36 containing salicylic acid has improved stability as compared with the hair treatment agents of Examples 33 to 35, which do not contain salicylic acid. I know you are. Similarly, the hair treatment agent of Example 40 containing salicylic acid has improved stability as compared with the hair treatment agents of Examples 37 to 39, which do not contain salicylic acid. I understand. Similarly, the hair treatment agents of Examples 43 to 46 containing salicylic acid have improved stability compared to the hair treatment agents of Examples 41 to 42 that do not contain salicylic acid. I know there is.

INDUSTRIAL APPLICABILITY As described above, the present invention is particularly useful as a hair treatment agent used in hair treatments such as dyeing treatment and bleaching treatment.

Claims (5)

A hair treatment agent containing a carboxylic acid or a salt thereof and an oxidizing agent,
the carboxylic acid is at least one of tartaric acid and malic acid;
pH is 2.0 to 4.0,
A hair treatment agent, wherein the content of the carboxylic acid or its salt is 5.0% by mass or less. 2. The hair treatment agent according to claim 1, further comprising salicylic acid. 3. The hair treatment agent according to claim 2, wherein the salicylic acid content is 0.001 to 3.0% by mass. 4. The hair treatment agent according to any one of claims 1 to 3, wherein the oxidizing agent is a hydrogen peroxide solution. 5. The hair treatment agent according to claim 4, wherein the hydrogen peroxide content is 1.5 to 9.0% by mass.