申请人:The Dow Chemical Company
公开号:US05023380A1
公开(公告)日:1991-06-11
Compounds have a structure represented by Formula I: CF.sub.2 =CF-X-R-(X-CF=CF.sub.2).sub.m wherein R represents an unsubstituted or inertly substituted hydrocarbyl group; each X is independently selected from the group consisting of groups having at least one non-carbon atom between R and --CF=CF.sub.2 ; and m is an integer of from 1 to about 3. Polymers formed from such compounds are also prepared. The compounds are preferably prepared by a method by a process comprising the steps of: (a) forming a salt having anion corresponding to a compound of Formula II: HX--R--(XH).sub.m ; wherein X, R and m are as defined for Formula I; (b) reacting the salt with a 1,2-dihalo-1,1,2, 2-tetrafluoroethane wherein the halo groups are iodine, bromine, chlorine or mixtures thereof, at least one halo group being bromine or iodine, to form a compound of Formula III: Z-CF.sub.2 CF.sub.2 -X-R-(X-CF.sub.2 CF.sub.2 - Z).sub.m wherein X, R and m are as defined for Formula I and each Z is independently iodine or bromine; (c) eliminating the halogen atoms represented by Z to form the perfluorovinyl compound represented by Formula I.
化合物具有由式I表示的结构:CF.sub.2 =CF-X-R-(X-CF=CF.sub.2).sub.m,其中R代表未取代或惰性取代的烃基;每个X独立地选自由至少一个非碳原子的群组,该群组位于R和--CF=CF.sub.2之间;m是一个从1到约3的整数。还制备了从这些化合物形成的聚合物。这些化合物最好是通过以下步骤的方法制备的:(a)形成具有阴离子,该阴离子对应于式II的化合物:HX--R--(XH).sub.m;其中X,R和m如式I所定义;(b)将盐与1,2-二卤-1,1,2,2-四氟乙烷反应,其中卤基为碘、溴、氯或其混合物,至少一个卤基为溴或碘,形成式III的化合物:Z-CF.sub.2 CF.sub.2 -X-R-(X-CF.sub.2 CF.sub.2 - Z).sub.m,其中X,R和m如式I所定义,每个Z独立地是碘或溴;(c)消除由Z表示的卤原子,形成由式I表示的全氟乙烯化合物。