2,2'-Dihydroxydiethyl ether, phthalandione, trans-butenedioic acid polymer 2,2'-Dihydroxydiethylether, phthalandione, trans-2-butenedioic acidpolymer 2-Butenedioic acid (2E)-, polymer with 1,3-isobenzofurandione and 2,2'-oxybis(ethanol) 29987-69-7 Diethylene glycol, phthalic anhydride, fumaric acid polymer Phthalic anhydride, fumaric acid, diethylene glycol polymer