Polymeric hair dyes

Polymeric dye of formula

• wherein
• A and B, independently from each other represent a polymer backbone;
• X1 and X2 independently from each other are a linkage group selected from —S—, —S—S—, —N—, —N=—, —N(R5)—, —S(O)—, —SO2—, —(CH2CH2—O)1-5—, —(CH2CH2CH2—O)1-5—, —C(O)—, —C(O)O—, —OCO—,
• —CON(R1)—, —C(NR1R2)2—, —(R1)NC(O)—, —C(S)R1—;
• which may be interrupted and/or terminated at one or both ends by one or more than one —C1-C30alkylene- or —C2-C12alkenylene-;
• or an optionally substituted, saturated or unsaturated, fused or non-fused aromatic or nonaromatic (heterocyclic) bivalent radical optionally comprising at least one heteroatom;
• a saturated or unsaturated, fused or non-fused aromatic or nonaromatic bivalent radical comprising at least one heteroatom, which is optionally substituted by C1-C30alkyl, C1-C30alkoxy, C2-C12alkenyl, C5-C10aryl, C5-C10cycloalkyl, C1-C10alkyl(C5-C10arylene), hydroxy or halogen;
• R1 and R2 independently from each other are hydrogen;
• unsubstituted or substituted, straight-chain or branched, monocyclic or polycyclic, interrupted or uninterrupted C1-C14alkyl;
• C2-C14alkenyl;
• C6-C10aryl;
• C6-C10aryl-C1-C10alkyl;
• or C5-C10alkyl(C5-C10aryl);
• Y1 and Y2 independently from each other are a residue of an organic dye selected from hydrazone dyes of formula
• wherein
• Z1, Z2 and Z3, independently from each other are —CR8— or —NR9+—;
• and at least one of Z1, Z2 or Z3 is —NR9+—;
• wherein at least one of Y1 and Y2 is a residue of an organic dye;
• R, R3, R4, R5, R6, R7, R8 and R9 independently from each other are hydrogen;
• hydroxy;
• C1-C5alkyl;
• hydroxy-C1-C5alkyl;
• C1-C5alkoxy;
• —NO2;
• —Cl;
• —Br;
• —COOH;
• —SO3H;
• —CN;
• NH2;
• or CH3—CO—NH—;
• An1, An2 and An3, independently from each other are an anion;
• a and b independently from each other are a number from 1 to 3;
• m is a number from 0 to 5000;
• n is a number from 0 to 5000;
• and
• p is a number from 1 to 5000;
• wherein the sum of m+n+p≧3.