Method of coloring porous material
US7041143B2 · kind B2 · utility
1Cited by
27References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2002 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Feb 28, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C245/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of coloring porous material, especially human hair, is described, which method comprises applying to the material being colored, in any desired order successively, or simultaneously, a) a capped diazonium compound and b) a water-soluble coupling component under conditions such that, initially, coupling does not take place, and then causing the capped diazonium compound present on the material to react with the coupling component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.