JP2000169344A - Pre-treating agent composition for acidic hair dye - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pre-treating agent composition for acidic hair dyes, capable of improving the dyeability of the acidic hair dyes and the retention of the color of dyed hair, when the composition is applied to the hair-before a hair dyeing treatment using the acidic hair dyes, by adding an alkali agent and an organic solvent and adjusting the composition to a specific pH. SOLUTION: This pre-treating agent composition for acidic hair dyes contains (A) an alkali agent (for example, triethanolamine, diethanolamine, isopropanolamine or monoethanolamine) and (B) an organic solvent, preferably an aromatic alcohol (for example, benzyl alcohol, anisalcohol or phenoxyisopropanol), and has pH 7.5-11.0. In the composition, the components A and B are preferably contained in amounts of 0.01-5 wt.% and 0.5-40 wt.%, respectively. The addition of a reducing agent such as thioglycolic acid, cysteine, a sulfite salt or a hydrogen sulfite salt to the above composition is preferable, because the dyeability and the retention of the color of dyed hair can be more enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention improves dyeability by applying to hair before dyeing with an acidic hair dye.
The present invention also relates to a pretreatment composition for an acidic hair dye which improves the color durability of hair after hair dyeing.

[0002]

2. Description of the Related Art The mainstream of hair dyes is an oxidative hair dye using an oxidative dye having good hair dyeing power and color durability, but has problems of hair damage and rash. Yes, it is not acceptable to everyone. On the other hand, acidic hair dyes (hair manicures) containing a tar dye are accepted by consumers because they are easy to use with little fear of hair damage or rash, and their share in the market is increasing. However, major problems of hair manicure include low hair dyeing power and poor color retention of hair after hair dyeing. Therefore, there is a demand for the development of an acidic hair dye which has the advantages of the conventional acid hair dye and has good hair dyeing power and hair color, but it has not been solved yet.

[0003]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that an alkaline agent and an organic solvent are contained before the hair is dyed with an acidic hair dye and the pH is reduced to 7 or more. By applying a pretreatment composition for an acidic hair dye adjusted to 0.5 to 11.0 to hair, in subsequent hair dyeing with an acid hair dye, dyeability is improved, and the color of the hair after hair dyeing The inventor has found that the durability is improved, and has completed the present invention.

That is, the present invention contains an alkaline agent and an organic solvent for pretreatment of hair dyeing with an acidic hair dye.
An object of the present invention is to provide a pretreatment composition for an acidic hair dye, wherein H is adjusted to 7.5 to 11.0. Hereinafter, the present invention will be described in more detail.

[0005] Examples of the alkali agent used in the present invention include inorganic alkalis and organic alkalis usually used in cosmetics. Examples of the inorganic alkali include hydroxides and carbonates of alkali metals such as sodium hydroxide, potassium hydroxide, sodium carbonate and potassium carbonate, and ammonia water. Examples of the organic alkali include a volatile alkali agent such as morpholine, triethanolamine, diethanolamine, isopropanolamine, diisopropanolamine, monoethanolamine, 2-amino-2-methyl-1-propanol,
Examples include alkanolamines such as amino-2-methyl-1,3-propanediol, and amino acids such as L-arginine and lysine.

Among them, considering the damage to hair and skin, triethanolamine, diethanolamine, isopropanolamine, diisopropanolamine, monoethanolamine, 2-amino-2-methyl-
1-propanol, 2-amino-2-methyl-1,3-
Alkanolamines such as propanediol and amino acids such as L-arginine and lysine are more preferred.

[0007] The compounding amount of these alkali agents is 0.01
-5% by weight, preferably 0.1-3% by weight. 0.
If the amount is lower than 01% by weight, the expected effect cannot be obtained. If the amount exceeds 5% by weight, the effect is not so much increased and the burden on the hair increases.

The organic solvent used in the present invention includes lower alcohols such as ethanol, n-propanol and isopropanol, ethylene glycol, propylene glycol, isoprene glycol, 1,3-propanediol, 1,3-butanediol, glycerin, Polyhydric alcohols such as polyethylene glycol, ethylene glycol ethers such as methyl cellosolve, ethyl cellosolve, methyl carbitol, ethyl carbitol, benzyl alcohol, phenethyl alcohol, γ-phenylpropyl alcohol, cinnamon alcohol, anis alcohol, p-methylbenzyl alcohol , Α-dimethylphenethyl alcohol, α-phenylethanol, phenoxyethanol, phenoxyisopropanol, 2-benzyloxyethanol, etc. Aromatic alcohols, N- methylpyrrolidone, N- octyl pyrrolidone, N- lauryl pyrrolidone such as N- alkylpyrrolidones, include alkylene carbonates such as ethylene carbonate, may be used alone or two or more of this.

Among these organic solvents, aromatic alcohols are more preferable in that the dyeing effect of the treatment with the acidic hair dye after the treatment of the present invention can be further enhanced. The content of these organic solvents is 0.5 to 40% by weight, preferably 1 to 30% by weight. If it is lower than 0.5% by weight, the effect is weak, and if it exceeds 40% by weight, no further effect can be expected.

The pH of the pretreatment agent for acidic hair dye of the present invention is preferably from 7.5 to 11.0, more preferably from 8.0 to 10.0. If it is lower than 7.5, the effect is weak, and if it is higher than 11.0, not only the effect is not improved but also damage to the skin and hair is increased.

The composition of the present invention may further comprise a thioglycolic acid and its derivative, cysteine and its derivative, a sulfite and a reducing agent selected from bisulfite.
By adding seeds or two or more, it is possible to further enhance the hair dyeing power and the color durability of hair after hair dyeing.

The dosage form of the product of the present invention can be in the form of a cream, an emulsion, a gel, a solution or a foam. Among them, gel or cream is particularly preferable, and having an appropriate viscosity, it has an advantage that it can be easily applied uniformly to hair and does not drip easily.

By adding a thickening agent to the composition of the present invention, it is possible to give an appropriate viscosity to form a gel. As the thickener, those usually used in cosmetics may be used.Examples of the cellulose-based thickener include hydroxyethyl cellulose, methyl cellulose, hydroxypropylmethyl cellulose, carboxymethyl cellulose, and the like, and acrylic acid-based carboxyvinyl polymer,
Examples include polyacrylamide, acrylic acid / alkyl methacrylate copolymer, and polysaccharides such as xanthan gum, carrageenan, sodium alginate, pectin, pullulan, furcellan, gum arabic, gatch gum, tragacanth gum, and agar powder. . Also, cationized cellulose derivatives, cationized guar gum, quaternized polyvinylpyrrolidone derivatives, diallyl quaternary
Cationic polymers represented by graded ammonium salt polymer derivatives and the like can also be blended.

Among these, hydroxyethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, cationized cellulose derivatives and xanthan gum are particularly preferred. The blending amount is not particularly limited, and a blending amount that gives the product of the present invention an appropriate viscosity is desired.

[0015] The creamy composition of the present invention can be obtained by emulsification using an oil, a surfactant and water as in the case of ordinary creamy cosmetics. Examples of the oil component include hydrocarbons, higher alcohols, higher fatty acids, lanolin, and silicone, and examples of the surfactant include nonionic, nonionic, cationic, and amphoteric surfactants.

The viscosity of the composition of the present invention is from 1000 to 10
About 10,000 centistokes is desirable. If it is lower than 1000 centistokes, it will be worried about dropping off. If it is higher than 100,000 centistokes, the composition will not stretch uniformly on the hair, and it will be difficult to apply the composition uniformly, resulting in poor operability.

A saccharide can be blended as a moisturizing component as long as the effects of the present invention are not impaired. As a result, the hair can be protected, so that the treated hair can be moistened and calmed down. Specifically, saccharides include sorbitol, maltose, mannitol, xylitol, xylose, maltitol, sucrose and its esters, glucose and the like. Further, for the same purpose, mucopolysaccharides such as hyaluronic acid, chondroitin sulfate and chitin, glycyrrhizic acid and its salts, glycyrrhetinic acid and its derivatives, guaiazulene, aloe extract or maronier extract can also be blended.

Of these, sorbitol, xylit, hyaluronic acid and chitin are more preferred. The compounding amount is 0.1 to 20% by weight, preferably 0.3 to 10% by weight.

Further, as long as the effects of the present invention are not impaired,
Moisturizers, hair protection agents, firming / stiffening agents such as amino acids and proteins, disinfectants / preservatives, ultraviolet absorbers, propellants,
Additives used for general cosmetics such as fragrances can be blended.

The composition of the product of the present invention can be used by applying an appropriate amount to hair before dyeing with an acidic hair dye, and
After standing at <RTIgt; 5 C </ RTI> for 5 to 40 minutes, the composition is washed away. Then, the hair may be lightly dried with a towel dryer or a drier, and then may be dyed with an acidic hair dye according to a conventional method.

[0021]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

[0022]

Examples 1 to 3 and Comparative Examples 1 to 3 (Gel Compositions) The pretreatment compositions for acidic hair dyes of Examples 1 to 3 and Comparative Examples 1 to 3 having the compositions shown in Table 1 were prepared. It was prepared by a conventional method, and using these, dyeability and hair color durability were evaluated.
The test method and evaluation criteria are shown below.

(1) Dyeability test The pretreatment compositions for acidic hair dyes of Examples 1 to 3 and Comparative Examples 1 to 3 were applied to yak hair bundles, respectively, left at room temperature for 30 minutes, and then washed. And dried. Thereafter, the hair is dyed with a commercially available acidic hair dye (Vigen Hair Manicure Dark Brown; manufactured by Hoyu Co., Ltd.), and the color strength of the hair is visually evaluated according to the following criteria, which are compared with those without pretreatment. did. <Evaluation Criteria> 染色: Dyeability is significantly improved compared to that without pre-treatment △: Dyeability is hardly different from that without pre-treatment ×: Dyeability is worse than that without pre-treatment

(2) Hair color durability test The hair bundles after the dyeing property test were each washed 20 times with a commercially available shampoo (Vigen Treatment Shampoo; manufactured by Hoyu Co., Ltd.), and the color depth of the hair was measured before washing. Was visually evaluated according to the following criteria in comparison with. <Evaluation Criteria> ；: The density is hardly changed compared to that before washing Δ: Slightly thinner than before washing ×: considerably thinner than before washing The results are shown in Table 1.

[0025]

[Table 1]

Example 4 (Gel Composition) Weight% Carboxyvinyl Polymer 1.0 Hydroxyethyl Cellulose 1.5 Benzyl Alcohol 6.0 Ethanol 10.0 N-Methylpyrrolidone 6.0 Monoethanolamine 0.5 Anhydrous Sodium Sulfite 1.5 Glycerin 3.0 Hyaluronic acid 1.0 Fragrance 0.2 Purified water Appropriate amount (pH 9.6) Pretreatment composition for gel-like acidic hair dye of the above composition is prepared by a conventional method, and the dyeing property and hair are prepared. Was evaluated in the same manner as described above, and the same good results as in Example 1 were obtained.

Example 5 (Cream composition)% by weight Liquid paraffin 4.0 Dimethicone 2.0 Cetanol 5.0 Polyoxyethylene cetyl ether 1.5 Sodium lauryl sulfate 1.0 1,3-butylene glycol 4.0 Benzyl alcohol 4.0 Ethanol 1.0 Cysteine hydrochloride 1.0 Xylit 1.5 Triethanolamine 0.4 Cationized cellulose 0.3 Fragrance 0.1 Purified water Appropriate amount (pH 9.0) Creamy acid dyeing of the above composition A pretreatment composition for hair was prepared by a conventional method, and the dyeability and the color durability of the hair were evaluated in the same manner as described above. As a result, the same good results as in Example 1 were obtained.

[0028]

According to the pretreatment composition for an acid hair dye of the present invention, the dye is applied to the hair before the hair is dyed by the acid hair dye, whereby the dyeability is improved and the hair after the hair is dyed is improved. It can improve color durability.

 ──────────────────────────────────────────────────続 き Continuing on the front page F-term (reference) 4C083 AB031 AB081 AB311 AB351 AB352 AC022 AC061 AC062 AC101 AC102 AC111 AC121 AC122 AC132 AC171 AC182 AC331 AC541 AC542 AC581 AC582 AC771 AC772 AC782 AC851 AC852 AD092 AD111 AD132 AD262 AD282 AD332 CC36 DD31 DD31

Claims (3)

[Claims] Claims: 1. An alkaline agent and an organic solvent,
Is from 7.5 to 11.0. A pretreatment composition for an acidic hair dye. 2. The pretreatment composition for an acidic hair dye according to claim 1, wherein the organic solvent is an aromatic alcohol. 3. The pretreatment composition for an acidic hair dye according to claim 1, further comprising a reducing agent.