Patent ID: 7157542

Claim:
A copolymer comprising: a polyethylene segment which is a main chain; a reactive silicon-containing group which is a side group of the polyethylene segment; and a polycondensation segment bonded to the polyethylene segment, which is a side chain with respect to the polyethylene segment, which comprises a repeating unit represented by the following formula wherein, A is a reactive silicon-containing group, R is each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, Q is a group compatible with the reactive silicon-containing group, m is an integer of 1 or more, n is an integer of 0 or 1 or more, k is an integer of 1 or more, and E has a structure represented by the following formula wherein, E 1 is a segment of polycarbonate, polyarylate or polysulfone, R 4 is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and x is an integer of 1 or more; or the following formula wherein, E 1 , R 4 and x are the same as defined above, and Z is each independently a segment of another polymer.