公开(公告)号：US06455617B1

公开(公告)日：2002-09-24

申请号：US09582400

申请日：2000-06-23

申请人： Michel Gay ,  Fabienne Howe ,  Christian Pusineri ,  Joëlle Viennet

发明人： Michel Gay ,  Fabienne Howe ,  Christian Pusineri ,  Joëlle Viennet

IPC分类号： C08K53432

CPC分类号： C08K5/38 ,  C08K5/3435 ,  C08K5/526 ,  C08L83/04

摘要： The invention concerns the use, for increasing the durability of moulds made of silicone elastomer crosslinkable by a poly addition or polycondensation reaction, of additive capable of stabilizing the silicone elastomer constituting the mold with respect to materials to be molded, of an additive selected among: (a) antioxidant additives comprising, in their structure additives containing at least one R—Sq—R′ group in which R and R′ are monovalent hydrocarbon groups with at least 3 carbon atoms or a monovalent hydrocarbon group with an ester bond or R and R′ together form a cycle, q being a whole number between 1 and 3 inclusively, (b) additives inhibitors of free radicals capable, in moulding conditions of generating radicals ═N—O; the invention concerns the synergistic combination of (a)+(b), the synergistic combination of (a) and/or (b) with phosphites (c), except for the use of bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate as only additive in a silicone elastomer mould cross-linked by polycondensation.

摘要翻译： 本发明涉及用于增加能够通过聚合或缩聚反应可交联的硅氧烷弹性体的模具的耐久性，所述添加剂能够使构成模具的硅氧烷弹性体相对于待模制材料稳定，所述添加剂选自： （a）抗氧化添加剂，在其结构中含有至少一种R-Sq-R'基团的添加剂，其中R和R'是具有至少3个碳原子的一价烃基或具有酯键的一价烃基或R和 R'一起形成循环，q为1〜3的整数，（b）自由基添加剂抑制剂，能够在产生自由基的成型条件= NO; 本发明涉及（a）+（b），（a）和/或（b）与亚磷酸酯（c）的协同组合的协同组合，除了使用双（1-辛氧基-2,2,6 ，6-四甲基-4-哌啶基）癸二酸酯作为仅通过缩聚交联的硅氧烷弹性体模具中的添加剂。