Patent ID: 7285598

Claim:
A polymer comprising mainly structural units represented by the following general formula (1): wherein, n stands for an integer of from 2 to 10; X 1 and X 2 each represents a hydrogen atom, a hydroxy group or a functional group that can be converted into a hydroxy group, provided that at least one of X 1 and X 2 represents a hydroxy group or a functional group that can be converted into a hydroxy group; R 1, R 2 and R 3 each represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an aryl group, an aralkyl group or a heteroaryl group, provided that plural R 1 s may be the same or different, wherein the total molar amount of terminal aldehyde group and acetal group contained in the polymer is 0.6 mol % or smaller relative to the total molar amount of the structural units represented by the formula (1); wherein the polymer is produced by a process comprising ring-opening, in the presence of a metal alkylidene complex comprising a ligand with an imidazolidine structure, a cyclic olefin comprising at least one cyclic olefin further comprising a hydroxy group or a functional group that can be converted into a hydroxy group, and hydrogenating a resulting unsaturated polymer to produce the polymer.