Dyeing process using a dye of styryl or imine type in combination with a weak acid, and device for implementing the process
US7527654B2 · kind B2 · utility
8Cited by
7References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2007 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Oct 12, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/88
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a process for dyeing keratin fibers, in particular human keratin fibers such as the hair, using a dye composition comprising at least one dye of styryl or imine type in the presence of a revealing composition comprising at least one optionally substituted (hetero) aromatic compound of weak acid type. The present invention makes it possible in particular to obtain a chromatic and fast coloration of keratin fibers, which is visible even on dark hair without prior lightening. The invention also makes it possible to obtain a coloration which, under certain conditions, does not stain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.