Diazamerocyanines for dyeing keratinous fibers
US3985499A · kind A · utility
58Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Mar 3, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S424/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Some novel diazo compounds, and salts thereof, useful for dyeing keratinous fibers, particularly human hair are disclosed. Illustrative of these compounds are the methyl sulfate salts of 1'-(4'-N,N-dimethylaminobenzene) 2-azo 4-cyano 1-methyl pyridinium methyl sulfate and 1'-(4'-amino 8'-hydroxy naphthalene) 2-azo 1-methyl pyridinium. Hair setting lotions, hair dye compositions and hair lacquers containing these compounds, preferably in alcoholic solutions, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.