Keratin fibre dye composition containing pyrazolopyrimidinoxo compounds, use thereof as dye couplers, and dyeing methods
US6179882A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Jun 16, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/4953
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a composition for dyeing keratin fibres, in particular human hair, containing, in a medium which is suitable for dyeing: PA1 as coupler, at least one compound of formula ##STR1## or one of the addition salts with an acid, with PA1 R.sub.1 denotes, in particular, hydrogen, alkyl, aryl, a heterocycle, halogen, PA1 R.sub.2 denotes, in particular, hydrogen, halogen, alkoxy, aryloxy, acyloxy, arylthio, alkylthio, PA1 R.sub.3 has the same meanings as those for R.sub.1, PA1 Z.sub.a and Z.sub.b, which are different, denote C.dbd.O or CR.sub.4, with R.sub.4 having the same meanings as R.sub.1 ; PA1 and at least one oxidation base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.