p-diaminobenzene derivative compounds and dye compositions containing same
US6042620A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1999 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Feb 25, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P17/16
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
New p-diaminobenzene derivative compounds of the formula (I): ##STR1## and physiologically compatible water soluble salts thereof are described, wherein X represents oxygen, sulfur, selenium or N-R9, wherein R9 represents hydrogen, an alkyl group, a hydroxyalkyl group, a phenyl group or an acetyl group; and the remaining R groups each represent variously hydrogen, hydroxy, amino, nitro, nitrile, alkyl, alkoxy, hydroxyalkyl, cyclic or aromatic groups, among others. Compositions for dyeing keratin fibers including a combination of coupler and developer substance are disclosed, in which the developer substance includes at least one of the new p-diaminobenzene derivative compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.