| 摘要 |
1309190 Triketoimidazolidine polymers. REICHHOLD ALBERT CHEMIE AG 17 June 1971 [19 June 1970] 28568/71 Heading C3R Modified N,N<SP>1</SP> - substituted 2,4,5 - triketoimidazolidine polymers are obtained by reacting (a) oxamidic esters having the group where R<SP>v</SP> is an aliphatic, cycloaliphatic or aromatic hydrocarbon group, with (b) isocyanates or isocyanate forming compounds, and with (c) polybasic carboxylic acid compounds, to obtain condensation products having amide or imide groups. The reaction may be carried out in a melt of the reactants or in a solvent. Two reactants may be reacted together first and the third reacted subsequently. In examples reactants (a) are 4,4<SP>1</SP>-bis-(ethoxalylamino)-diphenylmethane, 4,4<SP>1</SP> - bis - (ethoxalylamino)- 3,3<SP>1</SP> - dimethyldiphenylmethane and 1,4 - bis- (p-ethoxalylaminophenoxy)-benzene; reactants (b) are 4,4<SP>1</SP>-diisocyanato-diphenylether, 4,4<SP>1</SP>- diisocyanatodiphenylmethane and 2,4-tolylene diisocyanate; and reactants (c) are trimellitic anhydride, benzophenonetetracarboxylic acid dianhydride, naphthalenetetracarboxylic acid dianhydride, 2,5 - bis - (toluidino) - terephthalic acid, 4-aminonaphthoic acid anhydride, tetrahydrofurantetracarboxylic acid, N,N - terephthaloyl - bis - glycine, 4,4<SP>1</SP> - bis - (4 - carboxyphthalimido) - diphenylmethane and pyrromellitic acid dianhydride. Uses.-Coatings, moulded articles, foils, films, fibres, insulators and as starting materials and intermediates. |
