Patent ID: 7037993

Claim:
A norbornene ring-opened polymer in which having a repeating unit represented by the formula (1): wherein R 1 represents Q, R 2 represents Q or C(═O)R 5 , R 3 represents Q or C(═O)R 6 , and R 4 represents Q or X—C(═O)R 7 , wherein Q represents a hydrogen atom or a hydrocarbon group having 1–10 carbon atoms which may be substituted with a hetero atom-containing functional group or a halogen atom, R 5 , R 6 , and R 7 individually represent a hydroxyl group or an alkoxyl group having 1–10 carbon atoms which may be substituted with a hetero atom-containing functional group or a halogen atom, or R 6 and R 7 may be bonded together to form an oxygen atom, a sulfur atom, or NR 8 , wherein R 8 represents a hydrogen atom, a hydroxyl group, a substituted or unsubstituted hydrocarbon group having 1–10 carbon atoms, an alkoxyl group having 1–10 carbon atoms, or an alkoxycarbonyl group having 1–10 carbon atoms, and X represents a substituted or unsubstituted alkylene group having 1–5 carbon atoms, wherein, when R 2 is Q, R 3 is C(═O)R 6 and R 4 is X—C(═O)R 7 , and, when R 4 is Q, R 2 is C(═O)R 5 , R 3 is C(═O)R 6 , and R 2 and R 3 are in the trans position; and m represents 0 or 1; the norbornene ring-opened polymer having a weight average molecular weight determined by gel permeation chromatography of 1,000–1,000,000.