Storage stable 2-methyl-1-naphthol couplers
US5529583A · kind A · utility
5Cited by
5References
6Claims
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Key dates
| Filing date | Sep 14, 1995 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Sep 14, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compounds of Formula II ##STR1## wherein R.sub.3 is --COCH.sub.3, --COCH.sub.3 or --COCH.sub.2 CH.sub.3 and R.sub.4 is hydrogen or R.sub.3 is hydrogen and R.sub.4 is --OCH.sub.3, --OCH.sub.2 CH.sub.3, --OCH.sub.2 CH.sub.2 OH or --OCH.sub.2 CH.sub.2 OCH.sub.3 are storage stable and can be used in oxidative hairdye systems in place of the storage unstable 2-methyl-1-naphthol. Advantageously, it has been found to produce the same colors as 2-methyl-1-naphthol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.