Hair coloring dyes incorporating aryl amines and aryl aldehydes
US5199954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1992 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Feb 25, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/065
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An easily employed, effective and predictable hair dye composition is obtained by combining aryl amines with aryl aldehydes along with an inorganic metal salt having a valence between +1 and +3. By employing this formulation, a permanent, long-lasting, non-fading hair coloring is achieved. In the preferred embodiment, the inorganic metal salt is selected from the group consisting of aluminum chloride, ferric chloride, lithium bromide, manganese chloride, copper chloride, and manganese nitrate. In carrying out the teaching of the present invention, the aryl amine and aryl aldehyde may be applied to the hair separately or in combination, along with the inorganic metal salt. In addition, this inorganic metal salt can be applied after the application and removal of the aryl amine and aryl aldehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.