METHOD FOR PRODUCING POLYACETAL COPOLYMER

Title:

METHOD FOR PRODUCING POLYACETAL COPOLYMER

Document Type and Number:

WIPO Patent Application WO/2019/187984

Kind Code:

A1

Abstract:

The purpose of the present invention is to provide a method for producing a polyacetal copolymer, in which any disturbances in mass production less affect the polymerization. The method is for producing a polyacetal copolymer from trioxane as a main monomer (a) and a comonomer (b) copolymerizable therewith, and comprises using a polymerization catalyst (c) obtained by mixing a heteropolyacid (B) represented by general formula (1) with a heteropolyacid salt (A) represented by general formula (2) in a mass ratio of 10≥(A)/(B)≥0.2. Hm[M1 x·M2 yOz]·nH2O (1) M3 m[M1 x·M2 yOz]·nH2O (2) [In formulae (1) and (2), M1 represents one or two central elements selected from between P and Si, M2 represents one or more coordination elements selected from among W, Mo, and V, M3 represents an alkali metal, x is an integer of 1-10, y is an integer of 6-40, z is an integer of 10-100, m is an integer of 1 or larger, and n is an integer of 0-50.]

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Inventors:

KIRAI NAOHIRO (JP)
MASUDA EIJI (JP)

Application Number:

PCT/JP2019/008117

Publication Date:

October 03, 2019

Filing Date:

March 01, 2019

Export Citation:

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Assignee:

POLYPLASTICS CO (JP)

International Classes:

C08G2/06; C08G2/10

Domestic Patent References:

WO2015002147A1

2015-01-08

Foreign References:

JP2003026746A	2003-01-29
JP2014105279A	2014-06-09
JP2014095000A	2014-05-22
JPH09100329A	1997-04-15
JPH09100330A	1997-04-15
JPS6279223A	1987-04-11
JPS61268727A	1986-11-28
JPS61143428A	1986-07-01
JPS61123628A	1986-06-11
JPS61123626A	1986-06-11