2-Propenoic acid, 2-methyl-, oxiranylmethyl ester, polymer with 1H,3H-benzo(1,2-c:4,5-c')difuran-1,3,5,7-tetrone, 5,5'-carbonylbis(1,3-isobenzofurandione) and 4,4'-oxybis(benzenamine) 95251-54-0 Pyromellitic dianhydride 3,3',4,4'-benzophenonetetracarboxylic dianhydride 4,4'-diaminodiphenyl ether glycidyl methacrylate polymer