Hair dye compositions and methods utilizing 2-substituted-1-naphthol couplers
US5344463A · kind A · utility
19Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | May 17, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
2-substituted-1-naphthols when coupled with an oxidation dye precursor in an oxidative dye system produce a long lasting intense color to hair. Use of such couplers makes available to the colorist novel oxidation hair dyes which surprisingly show a color shift to the red. Dyestuffs prepared through use of the 2-substituted-1-naphthol couplers are substantially more acid-fast compared to like dyestuffs using a 1-naphthol coupler. Compositions and a method of dyeing hair are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.