Bis-para-phenylenediamine derivatives comprising a pyrrolidyl group and use of these derivatives for dyeing keratin fibres
US6923835B2 · kind B2 · utility
2Cited by
64References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Sep 9, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D487/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to novel bis-para-phenylenediamine derivatives containing a pyrrolidyl group substituted with a cationic radical, to dye compositions containing them and to the process of dyeing keratin fibres using these compositions.The present invention makes it possible to obtain a chromatic, powerful, sparingly selective and colourfast coloration of keratin fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.