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PROCESS FOR THE PREPARATION OF THERMALLY STABLE COPOLY (IMIDE-AMIDE) CONTAINING DIORGANOPOLYSILOXANE GROUPS
PROCESS FOR THE PREPARATION OF THERMALLY STABLE COPOLY (IMIDE-AMIDE) CONTAINING DIORGANOPOLYSILOXANE GROUPS
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机译:包含二有机聚硅氧烷基团的热稳定的钴(酰亚胺)的制备方法
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摘要
The present invention relates to a novel process for the preparation of heat-stable copolymers which contain, in their structure, recurring units formed of imide-amide groups and diorganopolysiloxane groups. …??More precisely, these copolymers are obtained by direct reaction, in a solvent medium, of a diisocyanate of the formula …IMAGE… with A = a valency bond or a divalent radical, a monoanhydride of a tricarboxylic acid of the formula …IMAGE… (II) with B = an aromatic trivalent radical, and a siloxane diisocyanate of the formula …IMAGE… with D = a divalent hydrocarbon radical of alkylaromatic nature, which can contain one or more heteroatoms, R1 to R8 = hydrocarbon radicals and x + y = a number ranging from 0 to 100.
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