Patent ID: 7005165

Claim:
Reactive side chain polymers within the class of polyimide, polyamic acids and esters thereof, characterized in that they comprise identical or different repeat units selected from at least one of the formulas: wherein A is a trivalent unsubstituted or optionally fluoro-, chioro-, cyano-, alkyl-, alkoxy-, fluoroalkyl- or fluoroalkoxy-substituted aromatic or cycloaliphatic group; R 1 is a monovalent radical containing 1 to 4 on-carbon double bonds and is selected from the group of C 3 –C 24 linear or branched aliphatic radicals, optionally interrupted by one to two 5- to 6-membered cyctoaliphatic or aromatic radicals and optionally substituted with 1 to 3 hetero atoms selected from the group of oxygen, nitrogen and sulfur, wherein the carbon—carbon double bonds(s) are isolated from any other π system within the side-chain; X is selected from the group of covalent bond, —O—, —S—, and —NR—, wherein R is selected from H, R 1 , and C 1 –C 4 hydrocarbon chain; B is hydrogen or a monovalent organic group derived from an alcohol after formal removal of the hydroxyl group; and a tetravalent organic radical of a tetracarboxylic acid dianhydride after formal removal of the two —CO—O—CO— groups, the four valencies of which are distributed between four different carbon atoms of the radical; wherein when M comprises two or more aromatic rings, said aromatic rings are linked by one or two linkers, independently selected from the group of a covalent bond —O—, —S—, —NR 2 , straight-chain and branched-chain alkylenes represented by —(CH 2 )n—,—L 2 (CH 2 ) n —,—(CH 2 ) n —L 2 , —L 2 (CH 2 ) n —L 3 —, each optionally mono- or poly-substituted by fluorine or chlorine and optionally chain interrupted by —O—, or —NR 2 , wherein L 2 and L 3 are selected, independently, from the group of —O—, —S—, —NR 2 —, —O—CO—, —CO—O—; R 2 is selected from H and C 1 –C 4 hydrocarbon chain and n is 1 to 20.