1,3-Isobenzofurandione, 5,5'-carbonylbis-, polymer with 4,4'-methylenebis(benzenamine) and 3,3'-(1,1,3,3-tetramethyl-1,3-disiloxanediyl)bis(1-propanamine) 121698-84-8 62891-63-8 Benzophenonetetracarboxylic acid dianhydride, 1,3-bis(gamma-aminopropyl)tetramethyldisiloxane, p,p'-methylenedianiline polymer