Method for dyeing keratin fibers with a dye compositions containing at least one direct dye and at least one basifying agent
US5980587A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | May 18, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/43
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for dyeing keratin fibers such as human hair by applying to the fibers a dye composition, in particular a lightening dye composition, containing, in a medium which is suitable for dyeing, at least one direct dye to be mixed at the time of use, at basic pH, with an oxidizing agent, wherein the dye composition a has a basic pH and contains, as direct dye, at least one dye containing an optionally delocalizable quaternized nitrogen atom and a --Z.dbd.N-- bond in which Z denotes a nitrogen atom or a --CH-- radical. The invention is also directed to a ready-to-use composition and a multi-compartment dyeing device for dyeing keratin fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.