Patent ID: 7723447

Claim:
A polymerization process comprising contacting one or more monomer(s), wherein the one or more monomer(s) is independently selected from the group consisting of olefins, alpha-olefins, disubstituted olefins, isoolefins, conjugated dienes, non-conjugated dienes, styrenics, substituted styrenics, and vinyl ethers, one or more Lewis acid(s), and a diluent comprising one or more hydrofluorocarbon(s) (HFC's) in a reactor and wherein the diluent comprises from 15 to 100 volume % HFC based upon the total volume of diluent, the temperature of the polymerization is less than 0° C. and the pressure is from above 0 to 14,000 kPa and wherein the one or more Lewis acid(s) is represented by the formula MR n X 3-n ; wherein M is a Group 13 metal; each R is a monovalent C 1 to C 12 hydrocarbon radical independently selected from the group consisting of an alkyl, aryl, arylalkyl, alkylaryl and cycloalkyl radicals; n is an integer from 1 to 3; and each X is a halogen.