专利名称：Polyimide having organopolysiloxane side
chain
发明人：Itoh, Maki c/o Dow Corning Asia, Ltd.申请号：EP94108099.6申请日：19940525公开号：EP0628590A2公开日：19941214
摘要：There is disclosed an organopolysiloxane having bifunctional biphenyl groups ofthe formula I wherein Q is selected from the group consisting of a nitro group, asubstituted amino group and an unsubstituted amino group, Z is an organopolysiloxanegroup represented by the formula II in which R is a divalent organic group having at least2 carbon atoms, R through R are the same or different monovalent organic groups, n is aninteger having a value of at least 1 and m is 0 or 1. The above organopolysiloxane may bereacted with an aromatic tetracarboxylic acid dianhydride and, optionally, with anaromatic diamine to obtain a polyamide acid, which may then be subjected to a thermalimidization step to provide a polyimide having repeating units shown by the formulas VIand VII wherein A is a tetravalent aromatic group, A3 is a divalent aromatic group and A isa divalent organic group which contains a siloxane residue and wherein the molar ratio ofrepeating unit VI to repeating unit VII in the range 100:0 to 1:99
申请人：DOW CORNING CORPORATION
地址：P.O. Box 1767 Midland Michigan 48686-0994 US
国籍：US
代理机构：Spott, Gottfried, Dr.
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