Method for dyeing keratin fibres with a dye composition containing at least one direct dye and a least one basifying agent
US6368360B2 · kind B2 · utility
16Cited by
7References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/43
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dye composition for keratin fibres comprising, at least one direct dye to be mixed at the time of use, at a basic pH, with an oxidizing agent, and characterized in that it has a basic pH and in that it contains, as direct dye, at least one dye containing an optionally delocalizable quaternized nitrogen atom and a -Z=N- bond in which Z denotes a nitrogen atom or a -CH- radical. The use of the composition and the multi-compartment dyeing kits, for the dyeing of keratin fibres, in particular the hair and more particularly human hair, are also discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.