发明名称 Polymerization catalyst and polymerization process
摘要 Siloxanes are polymerized by equilibration, condensation and/or ring-opening polymerization using a phosphazene base catalyst. A linear phosphazene base catalyst of the general formulawherein R denotes a C1-10 hydrocarbon or wherein two R groups on one N atom form with the N atom a heterocyclic group, X denotes an anion and n is from 1 to 10 is prepared by reacting a linear phosphonitrile halide compound with a secondary amine or a salt of a secondary amine or a metal amide thereof to form an aminated phosphazene material, followed by an ion exchange reaction replacing the anion with a nucleophile.
申请公布号 US6448196(B1) 申请公布日期 2002.09.10
申请号 US19990458244 申请日期 1999.12.09
申请人 DOW CORNING LIMITED 发明人 EGLIN DAVID;DE LA CRO HABIMANA JEAN;HUPFIELD PETER;SURGENOR AVRIL;TAYLOR RICHARD
分类号 B01J31/02;C07F9/06;C08G77/08;(IPC1-7):B01J27/14 主分类号 B01J31/02
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