Para-phenylenediamines which can be used in oxidative hair dyeing
US4563188A · kind A · utility
8Cited by
8References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1979 |
| Grant date | Jan 7, 1986 |
| Priority date | — |
| Expiry date | Apr 5, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/466
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
New para-phenylenediamines suitable for use in the oxidative dyeing of hair are described which provide useful "background" green shades. These compounds have the formula: ##STR1## in which n is an integer from 2 to 6 and R denotes an unsubstituted or mono- or poly-hydroxy substituted linear or branched alkylene group containing up to 6 carbon atoms, which alkylene group can optionally contain one or more ether groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.