2-Butenedioic acid (2E)-, polymer with 1,2-ethanediol and 1,1'-((1-methylethylidene)bis(4,1-phenyleneoxy))bis(2-propanol) 50475-05-3 Ethylene glycol, 1,1'-((1-methylethylidene)bis(4,1-phenyleneoxy))bis(2-propanol), fumaric acid polymer