申请人:DOW CORNING CORPORATION
公开号:EP0119817A2
公开(公告)日:1984-09-26
A method of producing a silicone polymer-filler mixture in powder form has been developed. The method combines an oligomer consisting of a polydiorganosiloxane, sufficient acidic or neutral reinforcing filler to yield a powder, and a catalytic amount of a catalyst consisting of (a) sulfuric acid or a sulfonic acid of the formula XS03H wherein X is selected from the group consisting of halogen, alkyl, aryl, alkoxy and alkaryl radicals, (b) perfluorinated alkane sulfonic acid, and (c) a combination of quaternary ammonium carboxylate and carboxylic acid, to give a powdery mixture. The powdery mixture is polymerized, then the catalyst is inactivated while maintaining a powdery state. The method requires a minimum of energy for mixing.
一种生产粉末状有机硅聚合物-填料混合物的方法已经研制成功。该方法将由聚二有机硅氧烷组成的低聚物、足够的酸性或中性增强填料和催化量的催化剂(a)硫酸或式 XS03H 的磺酸(其中 X 选自由卤素、烷基、芳基、烷氧基和烷芳基组成的组)、(b)全氟烷烃磺酸和(c)全氟烷烃磺酸(其中 X 选自由卤素、烷基、芳基、烷氧基和烷芳基组成的组)结合在一起、烷基、芳基、烷氧基和烷芳基;(b) 全氟烷磺酸;(c) 季铵羧酸盐和羧酸的组合。粉状混合物聚合后,催化剂失活,同时保持粉状状态。这种方法只需最低限度的能量进行混合。