Patent ID: 7514511

Claim:
A free radical polymerization process, comprising: reacting at least one free radically polymerizable monomer with at least one initiator in the present of at least one ionic liquid undergoing polymerization to obtain a polymer with a PDI of 1.5 or less, wherein the free radically polymerizable monomer is nitrogen-containing monomer, and the ionic liquid has a formula (IV), of: wherein Y − is SbF 6 − , PF 6 − , BF 4 − , (CF 3 SO 2 ) 2 N − , CF 3 SO 3 − , CH 3 CO 2 − , CF 3 CO 2 − , NO 3 − , Cl − , Br − , or I − ; and R 1 , R 2 , R 3 and R 4 are each independently C 1-10 fluoroalkyl group, or C 1-10 perfluoroalkyl group.