Developer-coupler hair dyes based on triamino-pyrimidinones
US4043750A · kind A · utility
3Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Apr 5, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/4953
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water-soluble substituted and unsubstituted triamino pyrimidinones are effective dyes for hair when oxidized in conjunction with a coupling agent. The oxidation can be performed at an alkaline pH at room temperature with air, and provides long-lasting and light-fast dyeings over a broad color range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.