COMPOSITION FOR POLYMERIZING VINYL CHLORIDE-BASED POLYMER AND METHOD FOR PREPARING VINYL CHLORIDE-BASED POLYMER USING SAME

WIPO Patent Application WO/2021/060909

A1

The present invention relates to a method for preparing a vinyl chloride-based polymer, comprising the steps of: (1) polymerizing vinyl chloride-based monomers in the presence of a vinyl chloride-based first seed particle, a vinyl chloride-based second seed particle, and an emulsifier; and (2) after the polymerization step, separating a first vinyl chloride-based polymer and a second vinyl chloride-based polymer which are in the form of particles, wherein the separated first vinyl chloride-based polymer is dried using a fluid bed dryer (FBD), and the first vinyl chloride-based polymer has an average particle diameter (D50) smaller than that of the second vinyl chloride-based polymer. The method can prepare two types of polymers different from each other in terms of physical properties through a single preparation process.

JP5118396	Vinyl chloride resin for paste and vinyl chloride resin composition for paste
JPS5937283	[Title of the Invention] A manufacturing method of poly halogenation vinyl latex
WO/2020/116935	METHOD FOR MANUFACTURING CHLORINATED POLYVINYL CHLORIDE RESIN

LEE SE WOONG (KR)
BAE HEUNG KWON (KR)
LEE HYUN MIN (KR)
YOUK KYUNG SEOG (KR)
LIM JOONG CHUL (KR)
LEE JUNG RAE (KR)

PCT/KR2020/013063

April 01, 2021

September 25, 2020

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LG CHEMICAL LTD (KR)

C08F14/06; C08F2/24; C08F6/16; C08F8/04; C08J3/12

KR20080049974A	2008-06-05
JP2004224838A	2004-08-12
JP2006306963A	2006-11-09
KR20170047054A	2017-05-04
JP3964190B2	2007-08-22
KR20190120119A	2019-10-23

See also references of EP 4036127A4

BAE, KIM & LEE IP (KR)

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