Diaminopyrazole derivatives and their use for oxidation...

Details Diaminopyrazole derivatives and their use for oxidation... Diaminopyrazole derivatives and their use for oxidation...

2007-07-31

2007-07-31

Elhilo, Eisa (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

C008S406000, C008S409000, C008S410000, C008S412000, C008S423000, C008S568000, C008S570000, C008S579000, C548S302700

Reexamination Certificate

active

10433683

ABSTRACT:
The invention concerns novel diaminopyrazole derivatives of formula (I), wherein: R1represents C1-C6alkyl or C2-C6, preferably up to C4, alkenyl, linear or branched, bearing at least a substituent selected among OR, NHR, NRR′, SR, SO2R, COOH, CONH2, CONRR′, PO(OH)2, SH, SO3X, a non-cationic heterocycle, Cl, Br or I−; X represents H, Na, K or NH4; R and R′, identical or different, represent C1-C6alkyl or C2-C6, preferably up to C4, alkenyl, linear or branched, unsubstituted or substituted by one or several functional groups selected among OH, NH2, OR, NHR, NRR′, SR, SOR, SO2R, COOH, CONH2, CONRR′, PO(OH)2, SH, SO3X, a non-cationic heterocycle, Cl, Br or I, X, R and R′ having the definitions mentioned above; R2represents H, or C1-C6alkyl or C2-C6, preferably up to C4, alkenyl, linear or branched, unsubstituted or substituted by one or several functional groups selected among OH, NH2, OR, NHR, NRR′, SR, SOR, SO2R, COOH, CONH2, CONRR′, PO(OH)2, SH, SO3X, a non-cationic heterocycle, Cl, Br or I, X, R and R′ having the definitions mentioned above; and their physiologically acceptable salts, and their use for oxidation dyeing of keratinous fibres, in particular human hair.

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