Patent ID: 8450450

Claim:
A process for manufacturing polyether glycol or copolyether glycol having a mean molecular weight of from about 200 dalton to about 30,000 dalton which comprises the step of polymerizing a reaction mixture comprising at least one tetrahydrofuran or at least one tetrahydrofuran and at least one other cyclic ether at polymerization effective conditions in the presence of a catalytically effective amount of perfluorosulfonic acid resin catalyst comprising a copolymer of tetrafluoroethylene or chlorotrifluoroethylene and a monomer of the formula CF 2 ═CF—O—CF 2 —CF 2 —SO 2 F, said catalyst having an equivalent weight of from 700 to 1100 grams/gram-mol of sulfonic acid, and optionally in the presence of an acylium ion precursor, carboxylic acid, and/or a chain terminator.