Patent ID: 8796410

Claim:
A polymer having repeating units represented by the following formulas (1-1), (1-2) and (1-3) and weight-average molecular weight of from 3,000 to 500,000, as determined by GPC using tetrahydrofuran as a solvent, reduced to polystyrene: wherein r, s and t are positive integers, the terminal silicon atom in the each of the repeating units represented by the formulas (1-1), (1-2) and (1-3) bonds to the terminal carbon atom in X 1 , X 2 or X 3 in the same or different unit, and R 1 is, independently of each other, a monovalent hydrocarbon group having 1 to 8 carbon atoms; X 1 is, independently of each other, a divalent group represented by the following formula (2), wherein Z is a substituted or unsubstituted divalent hydrocarbon group having 1 to 15 carbon atoms, p is 0 or 1, R 2 is, independently of each other, an alkyl or alkoxy group having 1 to 4 carbon atoms and q is 0, 1 or 2; X 2 is, independently of each other, a divalent group represented by the following formula (3) wherein R 3 is, independently of each other, a hydrogen atom, a monovalent hydrocarbon group having 1 to 8 carbon atoms or a glycidyl group; X 3 is, independently of each other, a divalent group represented by the following formula (4) wherein R 4 is, independently of each other, a monovalent hydrocarbon group having 1 to 8 carbon atoms and n is an integer of from 0 to 100.