申请人:The Dow Chemical Company
公开号:US05162468A1
公开(公告)日:1992-11-10
Compounds have a structure represented by Formula I: CF.sub.2 .dbd.CF--X--R--(X--CF.dbd.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.dbd.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.
化合物具有由公式I表示的结构:CF.sub.2.dbd.CF-X-R-(X-CF.dbd.CF.sub.2).sub.m,其中R代表未取代或惰性取代的烃基;每个X独立地选自于在R和--CF.dbd.CF.sub.2之间至少有一个非碳原子的基团组成的群;m为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)形成具有与公式II中化合物对应的阴离子的盐:HX-R-(XH.sub.m);其中X、R和m如公式I所定义;(b)将该盐与1,2-二卤代-1,1,2,2-四氟乙烷反应,其中卤基为碘、溴、氯或其混合物,至少有一个卤基为溴或碘,以形成公式III表示的化合物:Z-CF.sub.2CF.sub.2-X-R-(X-CF.sub.2CF.sub.2-Z).sub.m,其中X、R和m如公式I所定义,每个Z独立地为碘或溴;(c)消除由Z表示的卤原子,以形成由公式I表示的全氟乙烯化合物。