Patent ID: 7459507
Filing Date: 2008-12-02
Classification: C08C,C08F

Abstract:
1. A method for terminating anionic polymerization, in the course of preparing a homopolymer from conjugated diene monomers, in the course of preparing a conjugated diene copolymer from conjugated diene monomers, in the course of preparing a vinyl aromatic-conjugated diene copolymer from a vinyl aromatic monomer and a conjugated diene monomer, and in the course of preparing a block copolymer from a vinyl aromatic monomer and a conjugated diene monomer, all in the presence of an organic alkali metal compound as an anionic polymerization initiator, wherein said polymerization is terminated by mixing a phosphate ester and water to a nonpolar hydrocarbon solvent, wherein said phosphate ester is a mixture of mixture wherein R is a hydrogen atom or a C