Azo quinolinium compounds comprising a disulphide/thiol unit, compositions containing same, process for dyeing keratin fibres and device
US7967872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2008 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Sep 8, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to thiol/disulphide azo quinolinium compounds for dyeing keratin fibres. The invention relates to a dye composition comprising a particular thiol/disulphide azo quinolinium chromophore-containing thiol or disulphide dye, and to a process for dyeing keratin fibres such as the hair, using said composition. It similarly relates to novel particular thiol/disulphide azo quinolinium chromophore-containing dyes and to the uses thereof in dyeing keratin fibres. The dyeing process according to the invention makes it possible to dye keratin fibres without damaging them, in a manner which is particularly persistent with respect to shampooing operations and common attacks. Moreover, the novel dyes according to the invention extend the colour range to violets and blues. This process also makes it possible to dye bleached keratin fibres in a strong and chromatic manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.