Composition comprising at least one 2-pyrrolidone functionalized in the 4 position with a carboxylic acid or amide, and at least one direct dye or a pigment for dyeing keratin fibres
US8585779B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2011 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Jun 8, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D207/277
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a composition for dyeing keratin fibers, and in particular human keratin fibers such as the hair, comprising at least one 2-pyrrolidone functionalized in the 4 position with a carboxylic acid or amide radical, and at least one hydrophobic direct dye or a pigment; a dyeing process using this composition. Similarly, the invention relates to the use of the said pyrrolidone combined with a direct dye or a pigment for dyeing keratin fibers, and especially to the use of the said pyrrolidone for improving the color uptake onto the fibers of direct dyes that are sparingly soluble or insoluble in aqueous-alcoholic supports. The invention also relates to novel pyrrolidone derivatives. The present invention makes it possible in particular to obtain direct dyeing on keratin fibers that is fast, resistant to washing, chromatic and powerful.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.