Silicon-containing polymer, process for producing the same, heat-resistant resin composition, and heat-resistant film

摘要

The alkali-soluble silicon-containing polymer of the present invention is represented by the general formula (1) below and has a weight-average molecular weight in the range from 500 to 500,000: (In the formula, A1 is a phenyl group having either a hydroxyl group or an alkoxy group; R1 is an alkylene group of 1-4 carbons; m is 0 or 1; R2 is an alkyl group of 1-4 carbons; each of s and u is a positive number; t is 0 or a positive number; 0≦̸t/(s+u)≦̸1; and 0<u/s≦̸5).