Method for the termination of anionic polymerization using phosphate ester/water mixture
AssigneeKorea Kumho Petrochemical Co., Ltd.
InventorsSam-min Kim, Young Jin Kim, Seung Il Kim, Ji-Eun Ryu
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Abstract
The present invention relates to a method for terminating anionic polymerization using phosphate ester/water mixture, more particularly to a novel method for terminating anionic polymerization using phosphate ester/water mixture as a polymerization terminator in a living polymer solution prepared by the anionic polymerization, so that the polymerization can be terminated effectively, without coupling or discoloration and with less production of basic materials that affect the antioxidant, thereby enabling control of acidity without necessitating a further neutralization process.
Claims9
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 1 and mixture 2, wherein said mixture 1 is mixture of the compound represented by the formula (1) and the compound represented by the formula (2), and said mixture 2 is a mixture of the compound represented by the formula (3) and the compound represented by the formula (4):
- wherein R is a hydrogen atom or a C1-C20 alkyl and n is the number of repeating units of the ion enclosed within parentheses.
Dependencies are inferred from the claim text.