Compositions for dyeing keratinous fibers containing n-substituted derivatives of 4-hydroxyindole, new derivatives, process for preparing them, their use for dyeing, and dyeing processes
US5869692A · kind A · utility
2Cited by
4References
8Claims
0Family size
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Key dates
| Filing date | Sep 18, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Sep 18, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A composition for the oxidation dyeing of keratinous fibers containing at least one coupler selected from N-substituted 4-hydroxyindole compounds and acid addition salt thereofs and at least one oxidation base, N-substituted 4-hydroxyindole compounds, a process for synthesizing these substituted compounds, their use as couplers for the oxidation dyeing of keratinous fibers in combination with at least one oxidation base, as well as dyeing processes employing them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.