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1. 发明申请

WO1994002536A1 POLYCYCLOSILOXANES AND THERMALLY REVERSIBLE LIVING SILICONE RUBBERS 审中-公开
标题翻译：聚硅氧烷和热可逆生活硅胶橡胶
公开(公告)号：WO1994002536A1
公开(公告)日：1994-02-03
申请号：PCT/US1993006721
申请日：1993-07-16
申请人： TEMPLE UNIVERSITY - OF THE COMMONWEALTH SYSTEM OF
发明人： TEMPLE UNIVERSITY - OF THE COMMONWEALTH SYSTEM OF , BUESE, Mark, A. , CHANG, Pao-Sun
IPC分类号： C08G77/08
CPC分类号： C08G77/485 , C07F7/21 , C08G77/04 , C08G77/08 , C08G77/50
摘要： A composition curable to a thermally reversible rubber comprises (i) a strong acid catalyst having a pKa of less than about -9, (ii) at least one polycyclosiloxane containing at least one polyfunctional siloxane unit, and (iii) at least one polysiloxane selected from the group consisting of a linear polydimethylsiloxane; a polydimethylcyclosiloxane containing from about 6 to about 50 silicon-oxygen bonds; a linear or cyclic block copolymer of polydimethylsiloxane and a non-siloxane organic polymer; and a linear or cyclic random copolymer of a siloxane of the formula Si(R)(R1)O wherein R and R1 are different and are selected from the group consisting of hydrogen, C1-C18 hydrocarbon and C2-C18 hydroxyalkyl, wherein the catalyst comprises from about 0.05 to about 0.5 wt% of the composition, and the concentration of polyfunctional siloxane units is at least about two times the catalyst concentration in the composition, but no more than about 0.27 molar. Novel compounds useful as the polycyclosiloxane component of the composition are also provided.
摘要翻译：可固化成热可逆橡胶的组合物包括（i）pKa小于约-9的强酸催化剂，（ii）至少一种含有至少一个多官能硅氧烷单元的聚环硅氧烷，和（iii）至少一种选择的聚硅氧烷由线性聚二甲基硅氧烷组成的组; 含有约6至约50个硅 - 氧键的聚二甲基环硅氧烷; 聚二甲基硅氧烷和非硅氧烷有机聚合物的线性或环状嵌段共聚物; 以及式Si（R）（R 1）O的硅氧烷的直链或环状无规共聚物，其中R和R 1不同，并且选自氢，C 1 -C 18烃和C 2 -C 18羟烷基，其中催化剂占组合物的约0.05至约0.5重量％，并且多官能硅氧烷单元的浓度为组合物中催化剂浓度的至少约两倍，但不超过约0.27摩尔。还提供了可用作组合物的多环硅氧烷组分的新型化合物。

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