JP2002003349A - Pre-emulsion for hairdye - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pre-emulsion for a hairdye, capable of more readily producing an emulsion for dyeing the hair, having improved miscibility with an oxidant composition while providing the emulsion, and capable of making dispersibility and dyeing properties of the hairdye to the hair good. SOLUTION: This pre-emulsion for the hairdye, free from an emulsifier and fat material, containing <=10 wt.% water and having pH 7.1-9 contains (a) 20-40 wt.% of a 12-14C aliphatic alcohol ethoxylate having one to five added ethylene oxides, (b) 15-40 wt.% oleic acid, (c) 10-30 wt.% ethanediol distearate or 1,2- propanediol distearate, (d) 5-20 wt.% glyceryl stearate or of a fatty acid ester of a sugar, and (e) 0-25 wt.% 12-18C aliphatic alcohol.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-emulsion for a hair dye containing an aqueous emulsion containing an oxidation dye precursor as a main component and a method for producing a hair dye using the same.

[0002]

2. Description of the Related Art Permanent hair dyes containing an oxidation dye precursor as a main component are widely used. Generally, they are prepared by mixing an aqueous emulsion composition containing an oxidation dye precursor, usually a developer and a coupling substance, with a composition containing a peroxide immediately before use and applying it to the hair. Is used.

[0003]

SUMMARY OF THE INVENTION The present invention provides a simpler method for producing a hair dye emulsion, which saves time and labor, obtains such an emulsion, and provides an oxidizing agent composition, that is, usually a peroxide. An object of the present invention is to improve the mixability with hydrogen water and improve the dispersibility and dyeability of a hair dye on hair.

[0004]

Means for Solving the Problems The present invention comprises: a) 20 to 40% by weight of a fatty alcohol ethoxylate having 12 to 14 carbon atoms to which 1 to 5 ethylene oxides are added, b) 15 to 40% by weight of oleic acid %) C) 10-30% by weight of ethanediol distearate or 1,2-propanediol distearate d) 5-20% by weight of glyceryl stearate or sugar fatty acid ester and e) Fats having 12-18 carbon atoms A pre-emulsion for a hair dye containing 0 to 25% by weight of an aliphatic alcohol, containing no emulsifier and a fatty substance, containing 10% by weight or less of water and having a pH of 7.1 to 9. is there.

Another object of the present invention is to provide a method for producing a hair dye emulsion, which comprises mixing the pre-emulsion with an aqueous composition containing an oxidation dye precursor at 60 ° C. or lower.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The aliphatic alcohol ethoxylates of component a) used in the present invention include, for example, lauryl alcohol diethoxylate (laureth-2), myristyl alcohol triethoxylate (myristes-3),
Coco fatty alcohol triethoxylate (Cose-
3) and the like. Particularly, lauryl alcohol ethoxylate to which two ethylene oxides are added is preferable. These fatty alcohol ethoxylates are present in the pre-emulsion in an amount of 20 to 40% by weight, preferably 25 to 40% by weight.
35% by weight is contained.

The oleic acid of component b) is 15 to 40% by weight, preferably 25 to 35% by weight, in the pre-emulsion.
Contained.

The ethanediol distearate or 1,2-propanediol distearate of component c) can be used in combination, and 10 to 10
The content is 30% by weight, preferably 15 to 25% by weight.

Among the component d), sugar fatty acid esters include sucrose fatty acid esters and, for example, glucose distearate, methyl glucose distearate, methyl glucose sesquistearate, polyglyceryl-3-methyl glucose distearate and the like. Glucose fatty acid esters and the like. As component d), glyceryl stearate and a sugar fatty acid ester can be used in combination. Particularly, methyl glucose sesquistearate and polyglyceryl-3-methyl glucose distearate are preferred. Component d) contains 5
-20% by weight, preferably 5-15% by weight.

The aliphatic alcohol of component e) has 1 carbon atom.
2-18, for example, lauryl alcohol, myristyl alcohol, cetyl alcohol, coco aliphatic alcohol and the like. These aliphatic alcohols are present in the pre-emulsion in an amount of 0 to 25% by weight, preferably 5 to 2%.
0% by weight is contained.

The pre-emulsions according to the invention are prepared by mixing the molten components with small amounts, ie up to 10% by weight, preferably up to 5% by weight, particularly preferably up to 3% by weight of water, for example 25% ammonia Using water or ethanolamine such as monoethanolamine, pH
The pH is adjusted to 7.1 to 9, preferably 7.5 to 8.5. Further, it does not contain other emulsifiers and fatty substances.

Further, the pre-emulsion of the present invention comprises 20
C., the viscosity measured with a Brookfield viscometer BVT is about 5,000 to 30,000 mPa · s,
000-25,000 mPa · s, and 15,000-
It is preferably 20,000 mPa · s.

The pre-emulsion of the present invention comprises an aqueous composition containing an oxidation dye precursor at 60 ° C. or lower, preferably
By mixing at 0 to 50 ° C., an emulsion for hair coloring can be produced. The pre-emulsion and the aqueous composition are preferably mixed in a weight ratio of 15:40 to 85:60, especially 1: 2. In the production of hair dyes, by using such a simple composition as a pre-emulsion, it can be mixed at low temperature with an aqueous hair dye solution to obtain all desired colors.

The aqueous phase of the final product containing the oxidation dye precursor may contain a water-soluble emulsifier, and an anionic surfactant is particularly preferred. The anionic surfactant is preferably contained in the entire composition (final emulsion) in an amount of 0.25 to 5% by weight, particularly 0.4 to 2.5% by weight.

The anionic surfactant may be any of those used in ordinary hair treatment compositions, such as sulfate esters, sulfonic esters, and the like.
Surfactants such as carboxylic acids and alkyl phosphoric acids are exemplified. For example, alkyl ether sulfates having 12 to 14 carbon atoms, in particular, alkyl sulfates having 10 to 18 carbon atoms such as lauryl ether sulfate having 1 to 4 ethylene oxide added to the molecule, and ether sulfates; lauroyl sarcosine; Acylated amino acids such as lauroyl glutamate; monoglyceride (ether) sulfate; fatty acid amide sulfate obtained by ethoxylation of fatty acid alkanolamide and subsequent sulfate esterification; and alkali salts thereof; and mild and skin-compatible Long-chain mono- and dialkyl phosphoric acid ester salts which are surfactants are exemplified.

[0016] Other anionic surfactants include α-
Olefin sulfonic acid esters or salts thereof; examples thereof include alkali salts of sulfosuccinic acid semiesters such as disodium monooctylsulfosuccinate and alkali salts of long-chain monoalkylethoxysulfosuccinate. Preferred carboxylic acid surfactants are alkyl polyether carboxylic acids represented by the following formula and salts thereof.

## STR1 ## R- (C ₂ H ₄ O) _n —O—CH ₂ —COOX

(Wherein, R represents an alkyl group having 8 to 20 carbon atoms, preferably 12 to 14 carbon atoms, n is 1 to 20;
Preferably represents a number of 2 to 17, X represents a hydrogen atom or preferably a cation selected from sodium, potassium, magnesium and ammonium, and may be substituted with a hydroxyalkyl group), or an alkylamide polyether carboxylic acid Is an acid.

Such surfactants are known and, for example, those commercially available under trade names such as AKYPO and AKYPO-SOFT can be used. In addition, acyl isethionic acid having 8 to 20 carbon atoms can be used alone or in combination with other surfactants, sulfo fatty acids and esters thereof.

As the water-soluble emulsifier, an amphoteric or amphoteric surfactant can be used. In particular, it is preferably used in combination with an anionic surfactant so that the total amount in the total hair dye emulsion is 0.25 to 5% by weight, particularly 0.5 to 2.5% by weight. Examples of such amphoteric or amphoteric surfactants include fatty acid amide alkyl betaines,
Various known betaines such as sulfobetaine such as laurylhydroxysulfobetaine; cocoaminoacetate, cocoaminopropionate, long-chain alkyl amino acids such as cocoamphopropionate sodium and cocoamphoacetate sodium, and the like; Can be used.

A nonionic water-soluble surfactant such as a polyglucoside having 8 to 18 carbon atoms and a degree of polymerization of 1 to 5 is used alone or in combination with an anionic and / or amphoteric or amphoteric surfactant. Can be used.
Further, an amine oxide can also be used.

Further, a cationic surfactant such as a quaternary ammonium compound having 1 to 2 alkyl or alkenyl groups having 10 to 22 carbon atoms in the molecule is preferably used in an amount of 0.1 to 7 in the total composition. 0.5% by weight, particularly preferably 0.2
It can be used in the range of 5 to 5% by weight, more preferably 0.5 to 2.5% by weight.

Hair dye emulsions are prepared using the pre-emulsion of the present invention containing at least one oxidation dye precursor, usually a mixture of a color developer and a coupling substance. These are known and described, for example, in K. Schrader's paper "Grundlagen und Rezepturen der Kosmetika", 2nd edition (1989), pages 784-799. Examples of the developer include 1,4-diaminobenzene, 2,5-diaminotoluene, tetraaminopyrimidine, triaminohydroxypyrimidine, 1,2,4-triaminobenzene, and 2- (2,5-diaminophenyl). Ethanol, 2
-(2'-hydroxyethylamino) -5-aminotoluene, 1-amino-4-bis (2'-hydroxyethyl) -aminobenzene, and water-soluble salts thereof; examples of the coupling substance include: Resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 2-amino-4-chlorophenol, 4- (N-
Methyl) aminophenol, 2-aminophenol, 3
-Aminophenol, 1-methyl-2-hydroxy-4
-Aminobenzene, 3-N, N-dimethylaminophenol, 4-amino-3-methylphenol, 5-amino-2-methylphenol, 6-amino-3-methylphenol, 3-amino-2-methylamino- 6-methoxypyridine, 2-amino-3-hydroxypyridine, 4-
Aminodiphenylamine, 4,4′-diaminodiphenylamine, 2-dimethylamino-5-aminopyridine,
2,6-diaminopyridine, 1,3-diaminobenzene, 1-amino-3- (2′-hydroxyethylamino) benzene, 1-amino-3- [bis (2′-hydroxyethyl) amino] benzene, 1 , 3-Diaminotoluene, α-naphthol, 1,4-diamino-2-chlorobenzene, 4,6-dichlororesorcinol, 4-hydroxy-1,2-methylenedioxybenzene, 1,5-
Dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1-hydroxynaphthalene, 4-hydroxy-1,2-methylenedioxybenzene, 2,4-diamino-3-chlorophenol, 1-methoxy- 2-amino-4- (2'-hydroxyethylamino) benzene and the like.

The developer and the coupling substance are in a molar ratio of 1: 3 to 5: 1, in particular 1: 1 to 3: 1, depending on the desired color;
It is preferable to contain it in the hair dye emulsion in the range of 0.1 to 5% by weight. These oxidation dye precursors are preferably contained in the aqueous phase, but can also be added in the final emulsion.

The hair dye compositions produced according to the invention can furthermore contain so-called shading agents, in particular direct dyes, for fine adjustment of the desired shade. Examples of such a thickening agent include 2-amino-4,6-dinitrophenol, 2-amino-4-nitrophenol, and 2-amino-6-chloro-4.
And nitro dyes such as nitrophenol, etc., in the hair dye composition (excluding the oxidant composition).
It is preferable to contain it in an amount of 5% by weight, particularly 0.1 to 1% by weight.

The hair dye emulsion produced according to the present invention is usually used in such a composition together with the essential components,
For example, K. Schrader's paper "Grundlagen und Rezepturen d
er Kosmetika ", 2nd edition (1989), pages 782-815, such as conditioning agents, stabilizers, fats, oils, thickeners, complexes and the like.
The hair dye emulsion produced according to the present invention has a pH in the alkaline region, particularly pH 8 to 12.5, and furthermore pH 8.5.
~ 11 is preferred.

The oxidation dye precursor emulsion of the present invention comprises:
Used in combination with the oxidant composition. A preferred oxidizing agent is hydrogen peroxide at a concentration of 2-6% by weight. Other peroxides such as urea peroxide, melamine peroxide and the like can also be used.

The pH value of the hair dye composition at the time of use, that is, the pH value after mixing with the peroxide, is pH 5.5 to 6.9, as in the neutral and alkaline regions of pH 7.1 to 10. It may be weakly acidic.

[0029]

According to the present invention, an emulsion for hair dyeing can be produced more easily by saving time and labor, the emulsion can be obtained, and the mixing property with the oxidizing agent composition can be improved.
Good dispersibility and dyeability of hair dye on hair.

[0030]

EXAMPLE 1 A mixture of 12 kg of lauryl alcohol diethoxylate, 10 kg of oleic acid, 7 kg of ethanediol distearate and 3 kg of glyceryl stearate was dissolved by stirring at about 55 ° C., emulsified with 1 kg of water, and added with ammonia. PH 8.5
Was adjusted. The paste-form, pumpable pre-emulsion thus obtained is easily mixed at room temperature with an aqueous composition of the following composition in a weight ratio of oil phase: water phase = 1: 2 and stable. An aqueous emulsion was obtained. The hair dye emulsion and 6% hydrogen peroxide solution were mixed at a weight ratio of 1: 1 and applied to the hair for 25 minutes to dye the hair. After shampooing and drying, a strong, light-stable brown-purple dyeing was obtained.

2,5-diaminotoluene sulfate 0.75 (% by weight) resorcinol 0.28 3-aminophenol 0.03 4-amino-3-methylphenol 0.03 2-amino-3-hydroxypyridine 05 2-amino-4-hydroxyethylaminoanisole 0.03 Sodium lauryl sulfate 0.50 Ammonium chloride 0.25 Sodium sulfite 0.25 EDTA / 4 sodium 0.20 Ascorbic acid 0.15 Wheat protein hydrolyzate 0.20 Fragrance 0.20 Ammonia Amount that becomes pH 10.0 Water Remaining amount

Example 2 10 kg of coco aliphatic alcohol triethoxylate, 10 kg of oleic acid, ethanediol distearate / 1,2
4 kg of propanediol distearate (1: 1), 4 kg of cetyl alcohol and 3.5 kg of polyglyceryl-3-methylglucose distearate are mixed at about 50 ° C., emulsified with 1 kg of water and pH adjusted with monoethanolamine.
It was adjusted to 8.0. This stable, pumpable, paste-form pre-emulsion is mixed at about 40 ° C. with an aqueous composition of the following composition in a weight ratio of oily phase: aqueous phase = 1: 2 and stable hair dyeing An emulsion was obtained. This hair dye emulsion was mixed with a 6% aqueous hydrogen peroxide solution at a weight ratio of 1: 1 and applied to hair to give a strong, light and shampoo-stable purple dyeing.

2,5-diaminotoluene sulfate 1.00 (% by weight) 4-amino-2-hydroxytoluene 1.60 1-naphthol 0.40 2,5,6-triamino-4-hydroxypyrimidine sulfate 0 .40 sodium lauryl sulfate 1.00 sodium sulfite 0.50 silica 0.25 citric acid 0.65 panthenol 0.25 cationized vegetable protein hydrolyzate 0.25 ascorbic acid 0.20 fragrance 0.40 monoethanolamine 9 .80 remaining water

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Claims (2)

[Claims] 1. a) 20 to 40% by weight of an aliphatic alcohol ethoxylate having 12 to 14 carbon atoms to which 1 to 5 ethylene oxides are added, b) 15 to 40% by weight of oleic acid, c) Ethanediol distear 10 to 30% by weight of acrylate or 1,2-propanediol distearate, d) 5 to 20% by weight of glyceryl stearate or sugar fatty acid ester and e) 0 to 25% by weight of aliphatic alcohol having 12 to 18 carbon atoms. A pre-emulsion for a hair dye, which contains no emulsifier and fatty substance, has a water content of 10% by weight or less, and has a pH of 7.1 to 9. 2. A method for producing a hair dye emulsion, comprising mixing the pre-emulsion according to claim 1 with an aqueous composition containing an oxidation dye precursor at 60 ° C. or lower.