Use of a combination of two cationic dyes for the direct dyeing of keratin fibers
US6432146B1 · kind B1 · utility
14Cited by
9References
52Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 19, 2000 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jan 19, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to dyeing compositions comprising a combination of two specific cationic dyes and not containing a self-oxidizing agent, to the use of the compositions as direct dyes in dyeing applications for keratin fibers, and in particular human keratin fibers such as the hair, to direct dyeing processes using the compositions, and to dyeing devices using the compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.