Methods for dyeing hair with anthraquinone hair dyes having a quaternary ammonium side chain
US5520707A · kind A · utility
18Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1995 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Aug 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C225/34
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Anthraquinone compounds of formula I ##STR1## wherein R.sub.1 and R.sub.2 are methyl and R.sub.3 is propyl, or R.sub.1 and R.sub.2 are ethyl and R.sub.3 is methyl and A.sup.- is a cosmetically acceptable anion, are useful for the dyeing of hair. Compounds of formula I may advantageously be employed with direct dyes. Compositions and a method of use employing same are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.