Patent ID: 6958412

Claim:
A process for preparing a pentafluorophenyl acrylate polymer by bulk polymerizing a reaction mixture comprising a pentafluorophenyl acrylate monomer and a radical initiator, wherein the radical initiator is not soluble in the pentafluorophenyl acrylate monomer, wherein the improvement comprises subjecting the reaction mixture to an ultrasonication treatment, so that the mixing of the initiator and the monomer is enhanced; carrying out the bulk polymerization at a first temperature of 25-200° C. for a first period of time; and carrying out the bulk polymerization at a second temperature of 25-200° C. under a vacuum pressure for a second period of time, wherein the second temperature is higher than the first temperature for another period of time, so that residue amounts of the radical initiator, unreacted monomer and oligomer of the monomer are reduced in the resulting product mixture.