Patent ID: 7169530

Claim:
A polymer compound comprising a first unit represented by a general formula of the following Chemical Formula 1 and a second unit represented by a general formula of the following Chemical Formula 2 and having a weight-average molecular weight not less than 1,000 and not more than 500,000: wherein R 1 , R 2 and R 3 are the same or different and are a hydrogen atom, a fluorine atom, or a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20; R 4 is a straight-chain alkylene group or a branched or cyclic alkylene group with a carbon number not less than 0 and not more than 20; R 5 and R 6 are the same or different and are a hydrogen atom, a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20, or a protecting group released by an acid; R 7 is a methylene group, an oxygen atom, a sulfur atom or —SO 2 —; R 8 , R 9 , R 10 and R 11 are the same or different and are a hydrogen atom, a fluorine atom, a hydroxyl group, —OR 13 , —CO 2 R 13 , —R 12 —OR 13 or —R 12 —CO 2 R 13 , at least one of R 8 , R 9 , R 10 and R 11 including —OR 13 , —CO 2 R 13 , —R 12 —OR 13 or —R 12 —CO 2 R 13 (wherein R 12 is a straight-chain alkylene group, a branched or cyclic alkylene group or a fluoridated alkylene group with a carbon number not less than 1 and not more than 20 and R 13 is a hydrogen atom, a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20, or a protecting group released by an acid); 0<a<1; 0<b<1; and c is 0 or 1, and wherein R 3 of said first unit is a trifluoromethyl group.