Polymer compound

A Polymer compound comprising a polymer (a) that contains cyclic imidesgroups and a polymer (b) that contains monomer groups with a 2,4-diamino-1,3,5-triazine side group. According to the formula (see formula) whereby themole percentage ratio of the cyclic imides groups in the polymer compoundwith respect to the mole percentage of the monomer units with 2,4-diamino-1,3,5-triazine side group in the polymer compound is 0.1-10.0. Preferablypolymer (a) and/or polymer (b) contain styrene and/or alpha-methyl styreneas a co-monome