Dyssymmetrical diazo compounds having at least one 4-pyridinium unit and a cationic or non-cationic linker, compositions comprising them, method of coloring, and device
US7288639B2 · kind B2 · utility
2Cited by
30References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2005 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Feb 1, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present disclosure relates to dissymmetrical cationic diazo compounds having at least one 4-pyridinium unit and a cationic or non-cationic linker. The disclosure further relates to dyeing compositions comprising these compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers. Further, the disclosure relates to a method of coloring keratin fibers that employs this composition, and a device having a plurality of compartments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.