Symmetrical diazo compounds containing 2-pyridinium groups and cationic or non-cationic linker, compositions comprising them, method of coloring, and device
US7247713B2 · kind B2 · utility
5Cited by
28References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2005 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Jan 30, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D455/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present disclosure relates to symmetrical cationic diazo compounds of formula (I), the resonance forms, and also the acid addition salts and/or the solvates thereof:The present disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and a multi-compartment kit containing such compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.