Acryloxyorganosiloxane polymer.

摘要

Disclosed are an acryloxyorganosiloxane polymer having a structural unit represented by the formula (1): wherein X<1> is chlorine atom or fluorine atom, X<2> and X<3> are the same or different and each represent hydrogen atom or a group -CH2(CF2)pCF3 (wherein p is 0 or an integer of 1 to 5), Y is oxygen atom or -NH- group, m is 0 or an integer of 1 to 5 and n is 0 or an integer of 1 to 5; an acryloxyorganosiloxane polymer further having a structural unit represented by the following formula (2) in an amount of not more than 50% by weight based on the combined weight of the structural unit of the formula (1) and the structural unit of the formula (2): wherein X<4> is hydrogen atom, chlorine atom, fluorine atom, alkyl group having 1 to 3 carbon atoms or fluoroalkyl group having 1 to 3 carbon atoms, R is alkyl group having 1 to 20 carbon atoms or fluoroalkyl group having 1 to 20 carbon atoms (with the proviso that oxygen atom may be contained in the carbon atom chain); and a gas separating membrane prepared from the polymer having the structural unit of the formula (1) or a combination of structural unit of the formula (1) and not more than 50% by weight of structural unit of the formula (2).