Dyeing composition comprising a pyrazolo(1,5-a)pyrimidine and a monocyclic polyaminopyrimidine as oxidation bases and a coupler, and dyeing process

摘要

A composition for oxidation dyeing of keratin fibers contains: (A) a pyrazolo (1,5-a) pyrimidine as oxidation base; (B) a monocyclic polyaminopyrimidine as second oxidation base; and (C) a coupler. A composition for oxidation dyeing of keratin fibers comprises a suitable medium containing: (A) at least one oxidation base selected from pyrazolo (1,5-a) pyrimidines of formula (I) and their acid or base addition salts; (B) at least one monocyclic polyaminopyrimidine as second oxidation base; and (C) at least one coupler. R1-R4 = H, alkyl, aryl, hydroxyalkyl, 2-4C polyhydroxyalkyl, alkoxyalkyl, aminoalkyl (optionally N-protected by acetyl, ureido or sulfonyl), alkylaminoalkyl, dialkylaminoalkyl (where dialkyl may complete a 5- or 6-membered aliphatic (sic) o heterocyclic ring) or mono- or di-(hydroxyalkyl)-aminoalkyl; X = H, alkyl, aryl, hydroxyalkyl, 2-4C polyhydroxyalkyl, aminoalkyl, alkylaminoalkyl, dialkylaminoalkyl (where dialkyl may complete a 5- or 6-membered aliphatic (sic) or heterocyclic ring), mono- or di-(hydroxyalkyl)-aminoalkyl, NH2, mono- or dialkylamino, halo, COOH or SO3H; i = 0-4; p, q, n = 0 or 1; alkyl moieties have 1-4C unless specified otherwise; provided that: (i) p and q are not both 0; (ii) if p = q = 1, then the NR1R2 and NR3R4 groups are in the 2,3-, 5,6-, 6,7-, 3,5- or 3,7-positions; and (iii) if p + q = 1, then n = 1 and the NR1R2 (or NR2R3) and OH groups are in the 2,3-, 5,6-, 6,7-, 3,5- or 3,7-positions. Independent claims are also included for: (a) an oxidation dyeing method for keratin fibers, involving treating the fibers with a dyeing composition as above and developing the color at acidic, neutral or alkaline pH using an oxidizing agent (preferably hydrogen peroxide, urea peroxide, al metal bromate, persalt, peracid or an enzyme), added to the dyeing composition immediately before use or used in an oxidizing composition applied simultaneously or separately; and (b) a multi-compartment dyeing kit, containing the dyeing composition in one compartment and an oxidant composition in anot compartment.