Perfluoro-4-methyl-1,3-dioxole: a new monomer for high- Tg amorphous fluoropolymers

Abstract

A 4-Chloro-5-trifluoromethyl-2,2,4-trifluoro-1,3-dioxolane ( 1) was synthesised by reaction of CF 2(OF) 2 with CF 3CHCFCl; the elimination of HCl from ( 1) in basic conditions led to the formation of dioxole perfluoro-4-methyl-1,3-dioxole ( 2). Both these synthetic steps gave the corresponding product in high yield. A new synthetic route for the preparation of CF 3CHCFCl, starting from CF 2ClBr and CH 2CF 2, together with some examples of polymerisation products obtained by reaction of dioxole ( 2) with fluoroolefins are also reported.