Specific monocationic monochromophoric compounds of hydrazone type comprising a 2-, 4-pyridinium or 2-, 4-quinolinium unit, synthesis thereof, dye compositions containing them, and method for dyeing keratin fibres
US8012220B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Apr 13, 2007 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Apr 13, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B26/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present disclosure relates to monocationic monochromophoric compounds of formula (I) and (II) and dyeing compositions and multicompartment devices comprising monocationic monochromophoric compounds of formula (I) and (II). The disclosure also relates to methods for preparing monocationic monochromophoric compounds of formula (I) and (II), and also to methods for dyeing comprising applying monocationic monochromophoric compounds of formula (I) and (II) to keratin fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.