Agent for coloring fibers
US6740128B2 · kind B2 · utility
2Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jun 21, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The object of the invention is a preparation for dyeing fibers, especially hair, which is prepared before use by mixing an acidic component (A1), containing at least an enamine of formula (I) or its acid addition salt of Formula (Ia) with an alkaline component (A2), containing at least one carbonyl compound and at least one primary amine, as well as a method for temporarily dyeing fibers, by means of which the coloration, obtained with the aforementioned dyeing preparation, is removed once again at any later time by a sulfite-containing decolorizing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.