Meta-phenylenediamines, dyeing compositions in which they are present and the corresponding dyeing process
US4333730A · kind A · utility
14Cited by
2References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1980 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Apr 18, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel meta-phenylenediamines are provided for use as couplers with dye bases in hair dye compositions. These meta-phenylenediamines have the formula: ##STR1## in which n is 2, 3 or 4. Their acid addition salts may also be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.