Composition for dyeing human hair
US7135045B2 · kind B2 · utility
2Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2004 |
| Grant date | Nov 14, 2006 |
| Priority date | — |
| Expiry date | Jan 13, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/466
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This invention relates to a hair dyeing composition showing excellent dyeing ability comprising at least one direct acting hair dye and benzylurea and/or benzyl carbamate and/or N-(2-methoxybenzyl) urea. The direct acting hair dyes are preferably selected from anionic, acidic dyestuffs. In addition to benzylurea and/or benzyl carbamate and/or N-(2-methoxybenzyl) urea compositions further comprise organic solvents as penetration enhancers. Compositions according to the invention has a pH in the range from 1 to 5 and preferably comprises polymeric thickening agents, organic and/or inorganic acids and conditioning agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.