Cationic direct triazo dyes, dye composition comprising them and process for dyeing keratin fibres using it
US7220286B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2005 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to cationic direct dyes of formula (I) below:in which W1 represents —NR8— or —O—; X1 represents N; CR9; R1 and R2, which may be identical or different, represent a hydrocarbon chain; R3 and R4, which may be identical or different, represent a hydrogen atom, a halogen atom, a nitro group, a cyano group or a hydrocarbon chain; R5, R6, R7, R8 and R9, which may be identical or different, represent a hydrogen atom or a hydrocarbon chain; L represents a specific bridging group and X represents a cosmetically acceptable organic or mineral anion.It likewise relates to a dye composition comprising, in a medium suitable for dyeing human keratin fibers, such a dye, a process using it, and also a multicompartment device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.