Process and composition for dyeing hair utilizing zwitterionic conditioning agents
US6383232B1 · kind B1 · utility
5Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Feb 5, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/12
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A composition, process for preparation and use of a novel hair dyeing composition in the personal care industry. The composition when used in the dyeing process for hair results in a permanent coloration to the hair and improves manageability of the hair and minimizes damage from dyeing process. The use of zwitterionic compounds, specifically alkylmidopropyl dimethyl betaines provide unexpected penetration of the hair by the dye, unexpected oxidative stability in the dye compopsitions, and unexpected color deposition to the hair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.