Synonyms: (Phthalic anhydride-1,2-propylene glycol) polymer;(Phthalic anhydride-1,2-propylene glycol)polymer;1,2-Propylene glycol, phthalic anhydride polymer;1,2-Propylene glycol,phthalic anhydride polymer;1,3-Isobenzofurandione, polymer with 1,2-propanediol;1,3-Isobenzofurandione,polymer with 1,2-propanediol