Patent ID: 8669344
Filing Date: 2014-03-11
Classification: C08F

Abstract:
1. A method of removing a residual catalyst palladium compound from a polymer solution, comprising the steps of: a) mixing a solution in which at least one organic nitrogen compound is dissolved in a polar solvent and the polymer solution to precipitate a chelate compound containing the organic nitrogen compounds and the residual catalyst palladium compound; b) adding an ethyl alcohol to the solution mixture to dissolve the chelate compound and to precipitate a polymer; and c) filtering the precipitated polymer, wherein the polar solvent of step a) comprises at least one selected from the group consisting of water, acetone, ethyleneglycol, and glycerol, wherein the organic nitrogen compound of the step a) is selected from the group consisting of ethylenediaminetetraacetic acid tetrasodium salts, etheylenediaminetetraacetic acid disodium salts, and ethylenediaminetetraacetic acid dipotassium salts, wherein the polymer is an additional polymer, a homopolymer, or a copolymer of norbornene-based monomers represented by Formula 3 or 4, that is a homopolymer of one monomer selected from the monomers or a copolymer of at least two monomers selected from the monomers: wherein n is an integer of 1 to 10, and R is an alkyl group having 1 to 20 carbon atoms, wherein m is an integer of 0 to 4, R with a proviso that when R