Phthalic anhydride,ethylene glycol,trimethylolpropane polymer is a chemical compound registered under CAS number 31533-27-4. It is also known as 1,3-isobenzofurandione, polymer with 1,2-ethanediol and 2-ethyl-2-(hydroxymethy. KingChemi supplies Phthalic anhydride,ethylene glycol,trimethylolpropane polymer for laboratory research and bulk production; product code 239970. Send an inquiry for purity, packaging, price and lead time.