Patent ID: 7834114

Claim:
A polymeric compound comprising a monomeric unit represented by following Formula (I): wherein R a represents a hydrogen atom, a halogen atom, or an alkyl group having one to six carbon atoms which may have a halogen atom; R 1 s are substituents bound to a ring and each represent a halogen atom, an alkyl group having one to six carbon atoms which may have a halogen atom, a hydroxyalkyl group having one to six carbon atoms whose hydroxyl moiety may be protected by a protecting group and which may have a halogen atom, a carboxyl group which may form a salt, or a substituted oxycarbonyl group; “A” represents nonbonding or a methylene group; “m” is the number of R 1 s and represents an integer of 0 to 8; and “n” is the number of cyano groups (CN) bound to the ring and represents an integer of 1 to 9; and —COO— group bound to a polymer chain may have either of an endo conformation and an exo conformation.