| abstract |
(In general formula (2), R1 represents an alkylene group. R2 and R3, which may be the same or different, each represents hydrogen, an alkyl group or a hydroxyl group. x represents an integer of 0 to 20. However, when x is 0, at least one of R2 and R3 is an alkyl group. m represents an integer of 1 to 100. In general formula (3), n represents an integer of 1 to 100.) |