Dyeing composition at acidic pH comprising a direct dye of triarylmethane structure
US11000464B2 · kind B2 · utility
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56References
15Claims
0Family size
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Key dates
| Filing date | Dec 20, 2016 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Jun 29, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/5426
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a composition for dyeing keratin fibres comprising, in a cosmetically acceptable medium of acidic pH, the pH of which is preferably less than 5, one or more direct dyes of triarylmethane structure, which are preferably cationic. The invention also relates to a process for dyeing keratin fibres using said composition and also to a use for dyeing keratin fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.