Compositions for dyeing keratin fibers containing para-aminophenols, dyeing process, novel para-aminophenols and process for their preparation
US6673122B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2000 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Oct 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compositions for the oxidation dyeing of keratin fibers, comprising, as oxidation base, at least one para-aminophenol, of formula (I) and/or at least one acid-addition salt thereof: in which:R1 represents a hydrogen atom, a linear or branched C1-C4 alkyl radical or a C1-C4 trifluoroalkyl radical,R2 and R3 independently represent a hydrogen atom, a C1-C4 alkyl radical or a C1-C4 monohydroxyalkyl radical, andX, Y and Z independently represent a carbon, nitrogen, oxygen or sulphur atom, wherein the bonds XY and YZ are single or double bonds;a dyeing process using these compositions, novel para-aminophenols and a process for their preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.