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macrocyclische polyimidoligomere and methods of manufacture
macrocyclische polyimidoligomere and methods of manufacture
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机译:大环聚亚胺多米诺及其制造方法
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摘要
A compsn. (I) comprises macrocyclic polyimide oligomers of formula (1). A1 = mono- or polycyclic aromatic radical; R1 = non-silicon-contg. organic radical or bis(alkylene)polydiorganosiloxane radical; and n = at least 1, provided that neither A1 nor R1 contains a spiro(bis)indane moiety. Also claimed is a method for preparing (I), comprising reacting equimolar amts. of (A) a diamine(s) of formula (2) with (B) an aromatic tetracarboxylic acid(s) of formula (3), both maintained in high dilution in a non-polar organic liq., wherein a phenolic cpd(s). is also present as an acid coreactant (C), opt. if (B) is dianhydride and mandatorily if it is a tetracarboxylic acid: H2N-R3-NH2 (2) A2(COOH)4 (3) A2 = tetravalent mono- or polycyclic aromatic radical; and R3 = as R1.
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