Synonyms: 5-Isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-, polymer with 1,1-methylenebis4-isocyanatobenzene;1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic aci;5-isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-, polymer with 1,1’-methy;lenebis[4-isocyanatobenzene];p,p’-Diphenylmethane diisocyanate, trimellitic anhydride polymer;Trimellitic anhydride, methylenebis(phenylisocyanate) polymer