Patent ID: 7731761

Claim:
Polymeric dye of formula A and B, independently from each other represent a polymer backbone; X 1 and X 2 independently from each other are a linkage group selected from the group consisting of — C 1 -C 10 alkylene-; —C 2 -C 12 alkenylene-; —C 5 -C 10 cycloalkylene-; C 5 -C 10 arylene; —C 5 -C 10 arylene-(C 1 -C 10 alkylene)-; —C(O)—; —(CH 2 CH 2 —O) 1-5 —; —C(O)O—; —OCO—; —N(R 1 )—; —CON(R 1 )—; —(R 1 )NC(O)—; —O—; —S—; —S(O)—; —S(O) 2 —; —S(O) 2 —N(R 1 R 2 ); and the direct bond; R 1 and R 2 independently from each other are hydrogen; or unsubstituted or substituted, straight-chain or branched, monocyclic or polycyclic, interrupted or uninterrupted C 1 -C 14 alkyl; C 2 -C 14 alkenyl; C 6 -C 10 aryl; C 6 -C 10 aryl-C 1 -C 10 alkyl; or C 5 -C 10 alkyl(C 5 -C 10 aryl); Y 1 and Y 2 independently from each other are a residue of an organic dye; or hydrogen; wherein at least one of Y 1 and Y 2 is a residue of an organic dye; An 1 , An 2 and An 3 , 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 1000; n is a number from 0 to 1000; and p is a number from 1 to 1000; wherein the sum of m+n+p≧3.