JP2009167118A - Dyeing auxiliary used for dyeing keratin fiber by natural dyestuff - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dyeing auxiliary for easily and effectively dyeing keratin fibers such as human hairs, animal hairs, etc., in dyeing them by using a natural dyestuff. <P>SOLUTION: This dyeing auxiliary is characterized in that a molecule of the auxiliary, having ≥2 functional groups reacting with an alkali metal or ammonia in one molecule forms a salt with ≥2 moles of the alkali metal or ammonia based on the one molecule. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a dyeing assistant for effectively dyeing keratin fibers such as human hair and animal hair with natural dyes.

In plant dyeing performed using natural dyes, as described in Patent Document 1, long-time boiled dyeing is repeated to improve dyeability, but the work is complicated. Furthermore, it is very difficult to adopt such severe conditions in order to dye human hair. Thus, although phenylenediamine, aliphatic diamine, and the like are used as dyeing aids, as described in Non-Patent Document 1, side effects that cause allergies and rashes are feared.
JP-A-8-13361 FREGRANCE JOURNAL 2001-8 Special Feature "Hair dyes and hair dye functions and recent development trends" pages 11-15

Disclosed is a dyeing assistant that enhances the dyeability when keratin fibers of human hair, animal hair, etc. are dyed with natural dyes, and has mild and simple dyeing conditions and is highly safe.

The present invention relates to an alkali of a substance selected from the group consisting of a polybasic acid having two or more carboxyl groups, an amino acid, a nitrogen-containing heterocyclic compound having two or more amino groups and / or imino groups, and a mucopolysaccharide. A keratin fiber dyeing assistant, characterized in that it is a metal salt or an ammonium salt, and two or more of a carboxyl group, an amino group and / or an imino group form a salt with an alkali metal or ammonium.

By using the dyeing assistant of the present invention, keratin fibers can be dyed with natural dyes at a low temperature for a short time, and even if used for dyeing human hair, no allergic reaction or rash is caused.

Specific examples of the polybasic acid having two or more carboxyl groups in the present invention include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, Citric acid, malic acid, and tartaric acid. Among these polybasic acids, citric acid having three carboxyl groups is preferably used in order to improve dyeability.

Specific examples of amino acids in the present invention include glycine, alanine, valine, leucine, isoleucine, serine, threonine, phenylalanine, tyrosine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, glutamine, asparagine, glutamic acid, Arginine, histidine and lysine. Among these, histidine, tryptophan, and arginine are preferably used in order to further improve dyeability, and arginine is conveniently used from the viewpoint of easy availability.

Specific examples of the nitrogen-containing heterocyclic compound of the present invention include allantoin, cyanuric acid and isocyanuric acid.

Specific examples of the mucopolysaccharide of the present invention include hyaluronic acid, chitosan and chondroitin sulfate.

The dyeing assistant of the present invention is an alkali metal salt or ammonium salt of the above compound, and two or more of the carboxyl group, amino group and / or imino group form a salt with the alkali metal or ammonium. Specific examples of the alkali metal salt include sodium salt and potassium salt.

The method for producing the dyeing assistant of the present invention is not particularly limited, and a method of adding the above substance to an aqueous alkali metal solution or aqueous ammonia, for example, at room temperature and stirring can be employed.

Specific examples of natural dyes used in combination with the dyeing aid of the present invention include logwood, catechin, catechu, mylobaran, enju, suou, gardenia, lacquer, astringent, camellia, pentagram, wild peach, pomegranate, henna, and Cochineal may be mentioned, and these may be used alone or in combination of two or more. Natural dyes are generally used as 0.1 to 30% by weight aqueous solutions. A mordant such as ferrous sulfate, ferric chloride, copper sulfate, calcium acetate or aluminum acetate is added in an amount of 0.1 to 10% with respect to the aqueous solution of the natural dye, and a desired color is developed in advance. You can also

Specific examples of keratin fibers in the present invention include human hair and animal hair.

Next, the dyeing method using the dyeing assistant of the present invention will be described. The dyeing assistant is used in the form of liquid, gel or cream, and its concentration is generally 0.1 to 30% by weight. A natural dye or a dyeing agent which is a reaction product of this and a mordant is also used in a liquid, gel or cream form, and its concentration is generally 0.1 to 30% by weight.

Keratin fibers are dyed as follows, for example. First, the keratin fibers as the object to be dyed are immersed in an aqueous solution of a dyeing assistant or applied and pretreated, and then the object to be dyed is washed with water to remove moisture. Thereafter, the object to be dyed is immersed in an aqueous solution of the dyeing agent or is applied and dyed. The dyed keratin fibers are then washed with a detergent or shampoo, rinsed with water or warm water and then dried. The pretreatment and dyeing temperatures are usually 10 to 90 ° C., and the dyeing temperature and time are in a proportional relationship, and the higher the temperature, the shorter the time.

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Examples 1-8 and Comparative Examples 1-2.
The dyeing assistants and dyes used are shown in Tables 1 and 2. First, yak hair was dipped in an aqueous dyeing assistant solution composed of the constituents shown in Tables 1 and 2, pretreated at 50 ° C. for 10 minutes, rinsed with water to remove moisture. Next, ferrous sulfate, ferric chloride or aluminum acetate is added to the aqueous solutions of natural dyes shown in Tables 1 and 2, and the pre-treated yak hair is immersed in an aqueous solution of a dye that has been pre-colored. For 10 minutes, washed with water and dried. The evaluation results of the staining degree are also shown in Tables 1 and 2. The evaluation criteria are as follows.
◎ It was dyed deeply.
○ Slightly stained.
× Almost no staining
In addition, the used component raw material is as follows.
L-arginine, L-histidine, L-cystine and L-arginic acid: manufactured by Ajinomoto Co., Inc.
Citric acid and cyanuric acid: manufactured by Wako Pure Chemical Industries, Ltd.
Catechin: Product name “Polyphenon KN” (registered trademark), manufactured by Mitsui Norin Co., Ltd.
Hyaluronic acid: Product name “Hyaluronic acid HA-Q” manufactured by Kewpie Corporation.
Logwood 20% aqueous solution: Product name “RK Color 7LO-HPG”, manufactured by Toto Kasei Kogyo Co., Ltd.
Rack-dye 20% aqueous solution: manufactured by Nitto Kasei Kogyo Co., Ltd., trade name “RK Color 7LA-200L”.
Enju 20% aqueous solution: Product name “RK Color 4EN-HPG” manufactured by Toto Kasei Kogyo Co., Ltd.
Yak hair (bovine species): Commercial product.

Comparative Examples 1 and 2 were dyed under the same conditions as in Example 1 and Comparative Example 2 as in Example 8 except that the pretreatment with the dyeing assistant was not performed, but the yak hair was almost dyed. There wasn't.

From the results of Tables 1 and 2, in Examples 1 to 8, under the very mild conditions of dyeing aid treatment at 50 ° C. for 10 minutes and dyeing agent treatment at 40 ° C. for 10 minutes, It can be seen that the hair is deeply dyed in a predetermined color. In Comparative Example 1 treated in the same manner as in Example 8 and Comparative Example 2 treated in the same manner as in Example 1 except that no dyeing aid was used, except that the dyeing aid was not used, Yak hair was hardly dyed.

Claims (5)

An alkali metal salt of a substance selected from the group consisting of a polybasic acid having two or more carboxyl groups, an amino acid, an amino group and / or a nitrogen-containing heterocyclic compound having two or more imino groups and a mucopolysaccharide; A keratin fiber dyeing aid, which is an ammonium salt, wherein two or more of a carboxyl group, an amino group and / or an imino group form a salt with an alkali metal or ammonium. The polybasic acid is selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, citric acid, malic acid, and tartaric acid The keratin fiber dyeing assistant according to claim 1, wherein A group of amino acids consisting of glycine, alanine, valine, leucine, isoleucine, serine, threonine, phenylalanine, tyrosine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, glutamine, asparagine, glutamic acid, arginine, histidine and lysine The keratin fiber dyeing assistant according to claim 1, wherein the keratin fiber dyeing assistant is selected from the following. The keratin fiber dyeing assistant according to claim 1, wherein the nitrogen-containing heterocyclic compound is selected from the group consisting of allantoin, cyanuric acid and isocyanuric acid. The keratin fiber dyeing assistant according to claim 1, wherein the mucopolysaccharide is selected from the group consisting of hyaluronic acid, chitosan and chondroitin sulfate.