PRODUCTION METHOD FOR POLYACETAL COPOLYMER

WIPO Patent Application WO/2014/083983

A1

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, an alkali metal, a hydroxide of an alkali earth metal, or an alkoxide compound (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 component (d) be an alkali metal hydroxide, and further preferable that the component (d) be lithium hydroxide or sodium hydroxide.

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

PCT/JP2013/078945

June 05, 2014

October 25, 2013

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POLYPLASTICS CO (JP)

C08G2/10; C08G2/20

JPH09302055A	1997-11-25
JPH09278852A	1997-10-28
JPH0959332A	1997-03-04
JPH10120746A	1998-05-12
JP2003026746A	2003-01-29
JP2009249451A	2009-10-29
JPH0517567A	1993-01-26
US4956445A	1990-09-11
JPH01170610A	1989-07-05

SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)

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