Dyeing composition for keratinous fibers comprising a dicationic diazo dye
US7407516B2 · kind B2 · utility
11Cited by
9References
45Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2002 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Jun 11, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B44/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present disclosure relates to a novel dyeing composition for dyeing human keratinous fibers, such as hair, comprising at least one dicationic diazo dye of formula (I):[W1—N═N—W2—W3—(W4—W5)p-]2-L Formula (I)as well as the process for dyeing hair using same. Certain compounds of formula (I) are also disclosed herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.