Oxidation dye composition for keratinous fibres comprising a para-aminophenol, a meta-aminophenol and a 2-substituted para-aminophenol
US5993791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Mar 6, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a dyeing composition for keratinous fibers and in particular for human keratinous fibers such as hair, comprising, in a suitable medium for dyeing, at least one oxidation dye precursor chosen from 3-methyl-para-aminophenol, 2-methyl-para-aminophenol and 2-hydroxymethyl-para-aminophenol, and their addition salts with an acid; at least one coupling agent chosen from the 2-methyl-5-aminophenols of formula (I): ##STR1## in which R denotes hydrogen, methyl or ethyl or a .beta.-hydroxyethyl or .gamma.-hydroxypropyl group, and their addition salts with an acid; and as oxidation dye precursor, a para-aminophenol which is 2-substituted by a substituent which is different from methyl or hydroxymethyl, or one of its addition salts with an acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.