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Hair dye

A hair dye, hair technology, applied in the direction of hair care, cosmetics, cosmetic preparations, etc., to achieve the effect of safe hair dyeing effect

Inactive Publication Date: 2021-02-02
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still room for improvement in its hair dyeing effect

Method used

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  • Hair dye
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0139] Hereinafter, examples are given to further describe the present invention in detail, but the present invention is not limited by the examples. Unless otherwise specified, the compounding amount is shown by weight% with respect to the system which compounded the component.

[0140] First, in a hair dye using a substance having a flavonoid skeleton, a substance that improves the hair dyeing effect was studied.

[0141]The present inventors prepared the hair dyes (reaction solution (A) and reaction solution (B)) shown in Table 1 below by the following production method, and conducted the hair dyeing test shown below. Table 1 below shows the L value when the color of hair was measured by the following measurement method. The lower the L value, the darker the staining was judged.

[0142] (Preparation method of hair dye)

[0143] Mix the ingredients.

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Abstract

The present invention provides a hair dye which is safe for use on the human body, while exhibiting high hair dyeing effects. A hair dye which is characterized by being composed of a reaction liquid (A) that contains a substance that has a flavonoid skeleton represented by general formula (1), one or more substances selected from among benzyl alcohol, vanillin, propylene carbonate and gamma-butyrolactone, and one or more substances selected from among a thioglycolic acid salt, a thiolactic acid salt, cysteine and cysteamine, and a reaction liquid (B) that contains an oxidant. In the formula, each of R1, R2, R3, R4, R6 and R7 independently represents a hydrogen atom, a hydroxyl group or a methyl group, with one or both of R6 and R7 being a hydroxyl group; R5 represents a hydrogen atom, a hydroxyl group, a galloyl group or a sugar; and X represents >CH2, >C=O or >CHOH.

Description

[0001] related application [0002] This application claims the priority of Japanese Patent Application No. 2018-116502 filed on June 19, 2018, and incorporates it into this specification. technical field [0003] The invention relates to a hair dye, in particular to a hair dye which is safe for human body and has high hair dyeing effect. Background technique [0004] Oxidative hair dyes using oxidation dyes are generally called hair colors and are widely used as permanent hair dyes because of their fastness. Generally, an oxidation hair dye is composed of a first agent that contains an oxidation dye precursor that is oxidized inside the hair to form an oxidation dye, and a second agent that contains an oxidizing agent such as hydrogen peroxide that oxidizes the oxidation dye precursor. The 1st and 2nd doses are used to generate oxidation dyes for hair dyeing. It is said that since the oxidation dye produced by oxidation in the hair is a polymer, it is not easily desorbed ...

Claims

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Application Information

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IPC IPC(8): A61K8/49A61K8/20A61K8/22A61K8/34A61K8/35A61K8/46A61K8/60A61K8/66A61Q5/10
CPCA61Q5/10A61K8/34A61K8/35A61K8/46A61K8/347A61K8/447A61K8/498A61K8/19A61K8/20A61K8/4973A61K8/602A61K2800/4322A61K2800/4324A61K2800/88
Inventor 渡边大介松原孝典伊势直香
Owner SHISEIDO CO LTD
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