Diaminopyrazole derivatives and their use for oxidation...

Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing

Reexamination Certificate

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Details

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.

REFERENCES:
patent: 5534267 (1996-07-01), Neunhoeffer et al.
patent: 5663366 (1997-09-01), Neunhoeffer et al.
patent: 5865855 (1999-02-01), Doehling et al.
patent: 6099592 (2000-08-01), Vidal et al.
patent: 196 43 059 (1998-04-01), None
patent: 196 46 609 (1998-05-01), None
patent: 20013156 (2000-10-01), None
patent: WO00/43367 (2000-07-01), None
STIC Search Report dated Jan. 5, 2005.

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