Patent ID: 6512074
Filing Date: 2003-01-28
Classification: C08G,C08K

Abstract:
A polymerization catalyst of an oxirane compound for a reaction wherein the oxirane compound is subjected to suspension precipitation polymerization in an organic solvent which cannot dissolve a polymer, characterized by comprising a reaction product of (A) an alkylaluminum compound, (B) an oxoacid compound of phosphorus having at least one OH group in its molecule and (C) a nitrogen-containing cyclic compound having pKa of 6 to 8, wherein (C) the nitrogen-containing cyclic compound having pKa of 6 to 8 is a compound selected from the group consisting of akyl-substituted pyridines, alkoxypyridines, substituted phenanthrolines, substituted toluidines, substituted pyrrolines, N-(2-aminoethyl) piperidine and N-(2-aminoethyl)pyrrolidine.