Compositions for dyeing keratin fibers containing para-aminophenols, dyeing process, and para -aminophenols
US6203580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1998 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2018 |
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: ##STR1## in which: PA1 R.sub.1 represents a hydrogen atom, a linear or branched C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 trifluoroalkyl radical, PA1 R.sub.2 and R.sub.3 independently represent a hydrogen atom, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 monohydroxyalkyl radical, and PA1 X, Y and Z independently represent a carbon, nitrogen, oxygen or sulphur atom, PA1 wherein the bonds XY and YZ are single or double bonds; PA1 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.