Dyeing composition for dyeing keratinous fibers comprising at least one particular dicationic diazo dye
US6884265B2 · kind B2 · utility
64Cited by
6References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Apr 2, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/4322
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns a novel dyeing composition for dyeing keratinous fibers, in particular human hair, comprising a dicationic diazo dye of formula (I): W1—W2—N═N—W3—L—W4—N═N—W5—W6, as well as the dyeing method using said composition and the novel compounds of formula (I).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.