Patent ID: 6797013
Filing Date: 2004-09-28
Classification: A61K,A61Q

Abstract:
A composition for the oxidation dyeing of keratin fibers, comprising:a) at least one heterocyclic oxidation base chosen from pyridine derivatives and pyrimidine derivatives, and acid addition salts thereof, and b) as a direct dye, at least one 3-aminopyridine derivative chosen from the compounds of formula (I): â€ƒin which: B is chosen from formula (Ia) or (Ib): R is a C1-C4 alkyl radical; R1 is chosen from a hydrogen atom, a halogen atom, a C1-C4 alkyl radical, and a C1-C4 alkoxy radical; R2 is chosen from a hydrogen atom, a C1-C4 alkyl radical and a C1-C4 alkoxy radical; R4 is chosen from a hydrogen atom, a halogen atom, a C1-C4 alkyl radical, a nitro radical, an amino radical and a (C1-C4)acylamino radical; R3 is a hydrogen atom, or R4 and R3 together form a 6-membered unsaturated ring bearing a hydroxyl substituent chelated with one of the nitrogen atoms of the azo double bond; A is a residue â€”NR5R6 in which R5 is chosen from a hydrogen atom, a C1-C4 alkyl radical, a C1-C4 monohydroxyalkyl radical and a C2-C4 polyhydroxyalkyl radical; and R6 is chosen from a hydrogen atom, a C1-C4 alkyl radical, a C1-C4 monohydroxyalkyl radical, a C2-C4 polyhydroxyalkyl radical, a phenyl ring and a â€”CH2â€”SO3Na radical; and Xâˆ’ is chosen from a monovalent anion and a divalent anion.