Patent ID: 8658261

Claim:
A composition comprising a polymer comprising a repeating unit represented by formula (I) below: where, each of A 1 and A 2 independently represents a group selected from the group consisting of —O—, —NR a — wherein R a represents a hydrogen atom or a substituent, —S—, and —CO—; R 1 represents a substituent; R 2 and R 3 independently represent an electron attractive monovalent substituent having a Hammett's substituent constant σ p of larger than 0, or a heterocyclic group; n is an integer from 0 to 2; X represents an alkenylene group, alkynylene group, arylene group, or heterocyclic group; each of L 1 and L 2 independently represents one selected from Linking Group II shown below: where, R represents a hydrogen atom, alkyl group having 1 to 30 carbon atoms, or cycloalkyl group having 3 to 30 carbon atoms.