申请人:E. I. du Pont de Nemours and Company
公开号:US05763552A1
公开(公告)日:1998-06-09
A partially-fluorinated surfactant having internal methylene groups and having the formula R.sub.f --(CH.sub.2).sub.m --R'.sub.f --COOM wherein m is 1-3, R.sub.f is perfluoroalkyl or perfluoroalkoxy, containing 3-8 carbon atoms, R'.sub.f is linear or branched perfluoroalkylene containing 1-4 carbon atoms, and M is NH.sub.4, Li, Na, K, or H is useful in polymerization of fluorinated monomers. High molecular weight can be achieved in homopolymerization of tetrafluoroethylene.
一种部分氟化表面活性剂,具有内部亚甲基基团,其化学式为R.sub.f --(CH.sub.2).sub.m --R'.sub.f --COOM,其中m为1-3,R.sub.f为含有3-8个碳原子的全氟烷基或全氟烷氧基,R'.sub.f为线性或支链全氟烷基烯,含有1-4个碳原子,M为NH.sub.4,Li,Na,K或H,在氟化单体的聚合中非常有用。在四氟乙烯的同聚合中可以实现高分子量。