Coupling agent of light-colored hair dye

Abstract

The invention relates to a coupling agent and formula of a light-colored hair dye. The coupling agent of the light-colored hair dye, provided by the invention, is 6-amino-m-cresol; and an agent A and an agent B are contained in the formula of the hair dye, wherein the agent A comprises the following substances in percentage by mass: 8-12% of stearyl alcohol, 8-12% of propylene glycol, 5-8% of stearic acid, 2-4% of monoglyceride, 2-4% of ceteareth-20, 0.5-2% of dimethicone, ethanolamine for adjusting the pH value to 9-10, 0.5-1% of sodium sulfite, 0.1-0.5% of ascorbic acid, 0.05-0.1% of EDTA (Ethylene Diamine Tetraacetic Acid) disodium, 0.5-1.5% of N,N-bi-(beta-ethoxyl)-p-phenylenediamine sulfate or 0.5-2% of 2,5-diaminophenyl-ethanol sulfate, 0.03125-0.5% of 2-amino-5-methylphenol and the balance of water up to 100%; and the agent B comprises the following substances in percentage by mass: 4-6% of hydrogen peroxide, 8-12% of propylene glycol, 5-8% of stearic acid, 8-12% of stearyl alcohol, 2-4% of monoglyceride, 2-4% of ceteareth-20, 0.5-2% of dimethicone, phosphoric acid for adjusting the pH value to 2-5, 0.05-0.1% of EDTA disodium, a proper quantity of phenacetin and the balance of water up to 100%. The coupling agent and formula of the light-colored hair dye, provided by the invention, have the advantages of durable and stable dyeing effect, good fastness to washing and higher safety.

Description

technical field [0001] The invention relates to a coupler and a formula for light-colored hair dyes, and belongs to the technical field of cosmetic hair products. Background technique [0002] Paste-like two-component permanent hair dyes have always been the mainstream of commercially available hair dyes because of their good dyeing effect, wide color range, long duration, portability, and ease of use. However, most of the permanent hair dyes currently on the market contain P-phenylenediamine, studies have shown that p-phenylenediamine has side effects such as acute toxicity, sensitization and potential carcinogenicity. In order to improve the safety of the hair dye without changing the hair dyeing effect, we modified the low-toxic 2,5-diaminophenylethanol sulfate or N,N-di-(β-hydroxyethyl)-p- Phenylenediamine sulfate as a dye intermediate. However, we have found that when using 2,5-diaminophenethyl sulfate or N,N-bis-(β-hydroxyethyl)-p-phenylenediamine sulfate as an inter...

AI Technical Summary

Problems solved by technology

However, we have found that when using 2,5-diaminophenethyl sulfate or N,N-bis-(β-hydroxyethyl)-p-phenylenediamine sulfate as an intermediate, p-aminophenol, m-aminophenol Hair dyeing effect is not good, color fastness is not high