Curing composition for fluoropolymers

Abstract

Provided is a catalyst composition suitable for curing a fluoroelastomer, the catalyst composition comprising an anion of Formula III: wherein each Rf independently is selected from R—CF 2 and a perfluoroalkyl group having from 1 to 8 carbon atoms. R is selected from H, a halogen, an alkyl group having up to 8 carbon atoms, an aryl group having up to 8 carbon atoms, and a cycloalkyl group having up to 8 carbon atoms. The subscript n is a positive integer. The catalyst composition is free of hydrocarbon containing alcohol. In specific instances, Rf may be CF 3 .

We claim: 
     
         1 . A catalyst composition suitable for curing a fluoroelastomer, the catalyst composition comprising an anion of Formula III: 
       
         
           
           
               
               
           
         
         wherein each Rf independently is selected from R—CF2 and a perfluoroalkyl group having from 1 to 8 carbon atoms, wherein R selected from H, a halogen atom, an alkyl group having up to 8 carbon atoms, an aryl group having up to 8 carbon atoms, and a cycloalkyl group having up to 8 carbon atoms, and wherein n is a positive integer; 
         further wherein the catalyst composition is free of hydrocarbon containing alcohol. 
       
     
     
         2 . The composition of  claim 1  wherein each Rf is CF 3 .