| abstract |
A polymer includes a repeating unit (a-1) shown by a following formula (a-1), a repeating unit (a-2) shown by a following formula (a-2), and a GPC weight average molecular weight of about 1000 to about 100,000, n nwherein R 0 represents an alkyl group having 1 to 5 carbon atoms in which at least one hydrogen atom is substituted by a hydroxyl group, and R 1 represents a hydrogen atom, a methyl group, or a trifluoromethyl group,n n nwherein R 1 represents a hydrogen atom, a methyl group, or a trifluoromethyl group, R 2 represents an alkyl group having 1 to 4 carbon atoms, and R 3 represents an alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted monovalent cyclic hydrocarbon group having 4 to 20 carbon atoms, or a divalent cyclic hydrocarbon group having 4 to 20 carbon atoms formed by R 3 and R 3 bonding to each other together with a carbon atom. |