Triaromatic azomethine direct dyes, dye composition comprising at least one such dye, method of implementation and use
US9554977B2 · kind B2 · utility
2Cited by
35References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2012 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Jul 3, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/88
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to azomethine-type direct dyes having a triaromatic unit of formula (I) below: and also the use thereof for dyeing keratin fibers, in particular human keratin fibers such as the hair. The invention also relates to a composition for dyeing keratin fibers, comprising, in a medium suitable for dyeing, such direct dyes. Another subject of the present invention is a method for dyeing keratin fibers using said dye composition. Finally, the present invention also relates to precursors of these direct dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.