MODIFIED VINYL ALCOHOL POLYMER AND DISPERSION STABILIZER FOR SUSPENSION POLYMERIZATION

Title:

MODIFIED VINYL ALCOHOL POLYMER AND DISPERSION STABILIZER FOR SUSPENSION POLYMERIZATION

Document Type and Number:

WIPO Patent Application WO/2019/156006

Kind Code:

A1

Abstract:

Provided is a dispersion stabilizer for suspension polymerization that achieves, when suspension-polymerizing a vinyl composition, requisite performance such as (1) having fewer coarse particles in resin particles, (2) being able to obtain resin particles having as uniform a particle size as possible and prevent scale adhesion, and (3) being able to obtain resin having high porosity, and as a result, facilitate removal of monomer components and form resin having high plasticizer absorbency. This modified vinyl alcohol polymer comprises a polyoxyalkylene unit represented by general formula (I) on a side chain and a carbonyl unit represented by general formula (II) on a main chain terminal, wherein with respect to the total mol number of monomeric units that compose the main chain of the modified vinyl alcohol polymer, the proportion of the mol number of the monomeric units having the polyoxyalkylene unit represented by general formula (I) on the side chain is 0.01 to 5 mol%, and the proportion of the mol number of the carbonyl unit represented by general formula (II) is 0.01 to 0.5 mol%.

Inventors:

WATANABE WATARU (JP)

Application Number:

PCT/JP2019/003739

Publication Date:

August 15, 2019

Filing Date:

February 01, 2019

Export Citation:

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Assignee:

DENKA COMPANY LTD (JP)

International Classes:

C08F216/06; C08F2/20; C08F8/12

Domestic Patent References:

WO2013115239A1	2013-08-08
WO2010113569A1	2010-10-07
WO2010113568A1	2010-10-07
WO2013115239A1	2013-08-08

Foreign References:

JPH111505A	1999-01-06
JPH11217413A	1999-08-10
JPH05105702A	1993-04-27
JPS5445686A	1979-04-11
JP2014136796A	2014-07-28
JPS59155408A	1984-09-04
JP2000086992A	2000-03-28

Other References: