Double para-phenylenediamines joined by a linker arm substituted with one or more carboxylic radicals and/or derivatives and use in dyeing
US7413580B2 · kind B2 · utility
1Cited by
28References
24Claims
0Family size
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Key dates
| Filing date | Jun 29, 2006 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Sep 20, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/42
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present application relates to a novel family of double para-phenylenediamines joined by a linker arm substituted with one or more carboxylic radicals and/or derivatives and to the use thereof for the dyeing of keratin fibres.These novel para-phenylenediamines are useful as oxidation bases for the dyeing of keratin fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.