PRODUCTION METHOD FOR POLYACETAL COPOLYMER

Title:

PRODUCTION METHOD FOR POLYACETAL COPOLYMER

Document Type and Number:

WIPO Patent Application WO/2014/083987

Kind Code:

A1

Abstract:

Provided is a production method for a polyacetal copolymer that makes deactivation of a catalyst simple and efficient and that achieves a high polymerization yield and high quality using equipment that does not require a cleaning step and a process that involves a simple operation technique. The production method for a polyacetal copolymer uses trioxane as a main monomer (a) and a cyclic ether and/or a cyclic formal having at least one carbon-carbon bond as a comonomer (b). In the production method, a predetermined heteropolyacid is used as a polymerization catalyst (c) to perform copolymerization, a predetermined salt (d) is added to the reaction product, melt kneading processing is performed, and the polymerization catalyst (c) is deactivated. It is preferable that the heteropolyacid be selected from among phosphomolybdic acid, phosphotungstic acid, and the like. It is preferable that the salt (d) be selected from among sodium carbonate, sodium bicarbonate, sodium formate, and the like.

Inventors:

MASUDA EIJI (JP)
MONMA TOMOHIRO (JP)
HORIGUCHI TADAHIRO (JP)

Application Number:

PCT/JP2013/079011

Publication Date:

June 05, 2014

Filing Date:

October 25, 2013

Export Citation:

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Assignee:

POLYPLASTICS CO (JP)

International Classes:

C08G2/10; C08G2/20

Foreign References:

JP2003026746A	2003-01-29
JPH09302055A	1997-11-25
JPH10120746A	1998-05-12
JP2009221418A	2009-10-01
JP2009249451A	2009-10-29
JPS5542085B2	1980-10-28
JPS62257922A	1987-11-10
JPH01170610A	1989-07-05
JP2003026746A	2003-01-29

Other References: