1,4-Benzenedicarboxylic acid, polymer with 1,4-butanediol, 1,1'-methylenebis(4-isocyanatobenzene), 2,2'-((1-methylethylidene)bis((2,6-dibromo-4,1-phenylene)oxymethylene))bis(oxirane) and 4,4'-(1-methylethylidene)bis(2,6-dibromophenol) 73018-95-8