Keratin dyeing compounds, compositions containing them, and method and use thereof
US11142498B2 · kind B2 · utility
0Cited by
8References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 2018 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Oct 3, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/88
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A novel class of 3-halo-1H-indol-4-amine derivatives, particularly for dyeing keratin fibers, the azomethine dyes formed from them, their uses as a coupler for dyeing keratin fibers, hair dyeing compositions comprising them, method of dyeing hair thereof, and a hair dyeing kit thereof are disclosed. The products of the oxidative coupling with hair dye primary intermediates, particularly pyrazole derivative, a p-phenylenediamine derivative, a p-aminophenol derivative, have improved fastness properties over currently used violet-blue to blue azomethine dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.