Abstract: Compositions comprising a fluoropolymer having interpolymerized units derived from a nitrogen-containing cure site monomer and a cure catalyst derived from an amidine and an acid having a pKa value of about ?1 to about 4 are provided. Also provided are a method of making a fluoropolymer and fluoropolymer articles containing curable or cured fluoropolymer compositions.

Abstract: The present application provides a process to produce fluorinated vinyl ether by reacting a 2-alkoxypropionyl fluoride with a metal carbonate under anhydrous conditions in a stirred bed reactor at a temperature above the decarboxylation temperature of an intermediate carboxylate to produce a fluorinated vinyl ether. The process is carried out in the absence of solvent. With the process described, fluorinated vinyl ether of a high purity can be obtained in a high throughput manner.

Abstract: A method is provided for reacting hexafluoropropylene oxide (HFPO) with a perfluoroacyl fluorides according to the formula X—Rf—COF (II) to selectively produce a monoaddition product according to the formula X—Rf—CF2—O—CF(CF3)COF (I), wherein selectivity for the monoaddition product over the biaddition product is 90% or greater or more typically 95% or greater. A continuous or repeated-batch process is provided comprising the steps of: a) providing a mixture of X—Rf—COF (II), a fluoride salt, and a polar solvent; b) adding hexafluoropropylene oxide (HFPO) in an amount such that X—Rf—COF remains in molar excess of HFPO by at least 10% and reacting X—Rf—COF with HFPO; c) separating unreacted X—Rf—COF from a mixture of addition products of hexafluoropropylene oxide (HFPO) and X—Rf—COF; and d) repeating step a) using unreacted X—Rf—COF separated in step c).

Abstract: A method is provided for making a perfluorinated vinyl ether having a sulfonyl fluoride end-group according to the formula FSO2—(CF2)n—O—CF═CF2, where n is 2-5, comprising the steps of: a) fluorination of: to produce FSO2—(CF2)(n−1)—COF; b) reaction of FSO2—(CF2)(n−1)—COF with hexafluoropropylene oxide (HFPO) to produce FSO2—(CF2)(n)—O—CF(CF3)—COF; c) reaction of FSO2—(CF2)(n)—O—CF(CF3)—COF with a salt of a metal cation M+P, where p is the valence of M, to produce (FSO2—(CF2)(n)—O—CF(CF3)—COO−)pM+P; and d) thermal cracking of FSO2—(CF2)(n)—O—CF(CF3)—COO−)pM+P to produce FSO2—(CF2)(n)—O—CF═CF2.