Patent ID: 8236909
Filing Date: 2012-08-07
Classification: C08F

Abstract:
1. A method for preparing a polymer by precipitation polymerization, comprising the steps of mixing an antisolvent a), which does not dissolve the polymer prepared by polymerization, monomers including at least one cyclic olefin based monomer b), and a catalyst c), and while polymerizing the monomers b) in the antisolvent, simultaneously precipitating the polymer formed by the monomers b) in a solid phase to directly obtain the polymer without post-processing, wherein as the catalyst c), a catalyst mixture that has a precatalyst containing a metal of Group 10 represented by the following Formula 1 and a cocatalyst containing a salt compound with phosphonium represented by the following Formula 2 is used: wherein X is a hetero atom selected from S, O and N; R R M is a metal of Group 10; p is 0 to 2; wherein a, b and c are each an integer of 0 to 3, with the proviso that a+b+c=3; z is oxygen, sulfur, silicon, or nitrogen; d is 1, with the proviso that z is oxygen or sulfur, d is 2, with the proviso that z is nitrogen, and d is 3, with the proviso that z is silicon; R R [Ani] is an anion capable of weakly coordinating to the metal M of Formula 1, wherein the cyclic olefin-based monomer b) is a compound represented by the following Formula 3: wherein m is an integer of 0 to 4, R —R in the polar functional group, R R