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Hair dye

A technology of hair dyes and reagents, which can be used in mordant-containing compositions, hair care, azo dyes, etc. It can solve problems such as poor solubility, achieve good safety, prevent photofading, and have good hair dyeing performance and color tone Effect

Inactive Publication Date: 2012-09-19
SHISEI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrophobic UV absorbers also have disadvantages in that their direct use causes poor solubility, so it is difficult to incorporate them into compositions (Patent Document 4)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] Hair dyeing effect:

[0059] Hair coloring compositions comprising the compositions shown in Tables 1 to 4 were prepared by conventional methods. The numerical values ​​of the respective compounds shown in the tables represent percentages by weight based on the total weight of the first reagent and the second reagent. The hair coloring performance of these compositions was evaluated by the following method. The results obtained are shown in Tables 1 to 4. Sodium hydroxide and hydrochloric acid were used in the amounts required to adjust the pH to the values ​​shown in the table.

[0060] How to dye hair:

[0061] 2 g of the first agent was applied to 1 g of a tress of human hair (100% white, part number: BM-W; manufactured by Beaulax) having a length of about 10 cm, and spread evenly thereon. Then, stay for the specified time. Subsequently, 2 g of the second agent was applied thereon, spread evenly, and then left on the hair for the specified time. Subsequentl...

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Abstract

Disclosed is a safe hair dye having a short dying time, excellent dying properties and colour tone, and having an anti-photobleaching effect. The hair dye is obtained by mixing: (a) a first agent containing a substance which develops a colour when reacted with iron, and a UV absorbing agent having a 2-hydroxybenzophenone skeleton; and (b) a second agent containing an iron salt.

Description

technical field [0001] The present invention relates to a non-oxidative hair dye having good light fastness, dyeability and safety. Background technique [0002] Hair dyes are generally divided into four types, namely oxidative hair dyes, ionic hair dyes, temporary hair dyes and other types of hair dyes. Among these types of hair dyes, oxidative hair dyes are currently the most widely used, also known as permanent hair dyes, which mainly contain p-phenylenediamine or p-aminophenol, which are oxidized by hydrogen peroxide become active reaction intermediates. The reactive intermediate then reacts with the dye-coupled molecules in the hair to transform into a shampoo-resistant hair dye. However, oxidative hair dyes damage hair, may cause contact dermatitis or cause potential systemic effects after prolonged use, and are suspected of mutagenic or carcinogenic effects. Ionic hair dyes are also called semi-permanent hair dyes, which do not damage the hair. However, ionic hair...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/19A61K8/35A61K8/36A61K8/97A61Q5/10
CPCA61K8/19A61K8/35A61Q17/04A61Q5/004A61Q5/10C09B57/10C09B65/00
Inventor 相见牧子
Owner SHISEI CHEM
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