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1. (WO2018043944) METHOD FOR PREPARING VINYL CHLORIDE-BASED POLYMER

Pub. No.:    WO/2018/043944    International Application No.:    PCT/KR2017/008642
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu Aug 10 01:59:59 CEST 2017
IPC: C08F 2/20
C08F 14/06
C08F 8/20
C08F 2/38
Applicants: HANWHA CHEMICAL CORPORATION
한화케미칼 주식회사
Inventors: NAMKOONG, Ji Eun
남궁지은
YUN, Mi Kyoung
윤미경
JIN, Seon Jeong
진선정
KWON, Hyeok Chil
권혁칠
Title: METHOD FOR PREPARING VINYL CHLORIDE-BASED POLYMER
Abstract:
According to the present invention, a method for preparing a vinyl chloride-based polymer can prepare a vinyl chloride-based polymer which has a small average diameter and high porosity and bulk density and is polymerized in the presence of a polyvinyl alcohol (PVA)-based suspension and a hydroxypropyl methylcellulose (HPMC)-based suspension, which are two types having different degrees of saponification. In addition, a chlorinated vinyl chloride-based resin obtained by chlorinating the vinyl chloride-based polymer is prepared within a short chlorination reaction time and simultaneously exhibits improved whiteness.