Synthesis of low molecular weight perfluoro oxymethylene vinyl ethers

Synthesis of perfluoro-t-butyl trifluorovinyl ether and its copolymerization with TFE

“…For example, perfluorinated vinyl ethers were made by the reaction of the corresponding acyl fluorides with hexafluoropropylene epoxide (HFPO), followed by pyrolysis of the extended acyl fluoride products over sodium carbonate [11,12]. Another process to produce perfluorinated vinyl ethers involves the addition of hypofluorites R f OF to halogenated olefin FClC5 5CClF followed by dechlorination [13][14][15]. The versatility of perfluorinated vinyl ethers prepared by the latter process depends on the hypofluorites R f OF.…”

Novel perfluoropolyethers containing 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole blocks: synthesis and characterization

“…Photo-oxidation is a very versatile technology that can also be applied for the preparation of functionalized PFPEs by introduction of specific fluorinated co-monomers like 1,3-perfluorobutadiene [3], perfluoroalkylsulfonyl vinyl ethers [4] and perfluorodioxoles [5]. For example, by using 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole (TTD) as comonomer, a peroxidic PFPE with functional repeating units of the type -CF(OCF 2 OC(O)CF 3 )O-is obtained [5].…”

“…For example, by using 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole (TTD) as comonomer, a peroxidic PFPE with functional repeating units of the type -CF(OCF 2 OC(O)CF 3 )O-is obtained [5].…”

Synthesis of trifluoromethyl fluoroformate from trifluoromethyl hypofluorite and carbon monoxide: Thermal and catalyzed reaction

“…Higher homologs of this vinyl ether with general formula CF 3 O(CF 2 O) n CF 2 OCF5 5CF 2 (n ! 1) are also of interest [22]. An efficient route to 4 is an enabler for the commercialization of these novel fluoroelastomers [23].…”