申请人:IKEDA Norihiko
公开号:US20100239981A1
公开(公告)日:2010-09-23
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,
wherein 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,
wherein 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.