申请人:E. I. Du Pont de Nemours and Company
公开号:US04598161A1
公开(公告)日:1986-07-01
Tris(dialkylamino)sulfonium bifluoride salts are obtained by hydrolysis, methanolysis, or pyrolysis of corresponding tris(dialkylamino)sulfonium difluorotrimethylsilicates, reaction of dialkylaminotrialkylsilanes with sulfur tetrafluoride, or reaction of bis(dialkylamino)sulfur difluorides with dialkylamines. These bifluoride salts, which have the general formula (R.sup.1 R.sup.2 N)(R.sup.3 R.sup.4 N)(R.sup.5 R.sup.6 N)S.sup..sym. HF.sub.2.sup..crclbar., are useful polymerization catalysts.
Tris(dialkylamino)sulfonium bifluoride盐可通过对应的tris(dialkylamino)sulfonium difluorotrimethylsilicates的水解、甲醇解或热解,二烷基氨基三烷基硅烷与四氟化硫的反应,或双(二烷基氨基)硫二氟化物与二烷基胺的反应获得。这些具有通式(R.sup.1 R.sup.2 N)(R.sup.3 R.sup.4 N)(R.sup.5 R.sup.6 N)S.sup..sym. HF.sub.2.sup..crclbar.的双氟化氢盐是有用的聚合催化剂。