Composition for hair dyeing which contains a para base and an ortho base
US4268264A · kind A · utility
22Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Apr 5, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to compositions intended for dyeing keratin fibres which contain, as the only oxidative dyestuffs, oxidative dyestuff precursors of the para type and of the ortho type, at least one said precursor of the para type being an aromatic diamine, of specified formula or a specified bis-condensed precursor and at least one said precursor of the ortho type which is an ortho-aminophenol, ortho-diphenol, ortho-phenylenediamine or a derivative thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.