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Patent Searching and Data


Title:
METHOD FOR PREPARING VINYL CHLORIDE-BASED POLYMER AND VINYL CHLORIDE-BASED POLYMER PREPARED THEREBY
Document Type and Number:
WIPO Patent Application WO/2017/191899
Kind Code:
A1
Abstract:
The present invention provides a method for preparing a vinyl chloride-based polymer, and a vinyl chloride-based polymer prepared by the method, the method comprising a step for subjecting a monomer for preparing a vinyl chloride-based polymer to suspension polymerization in the presence of a polymerization initiator, a dispersant, and a water-soluble cellulose ether, wherein the dispersant contains a mixture of at least two polyvinyl alcohols with different degrees of saponification, the mixture of polyvinyl alcohols having an average molar degree of saponification of 76 mol% to 80 mol%, and wherein the water-soluble cellulose ether has a gel point of 60℃ to 90℃, and is fed before polymerization initiation or within a polymerization conversion ratio of 70%.

Inventors:
JEON YANG JUN (KR)
HA HYUN KYOU (KR)
LIM JOONG CHUL (KR)
JU JIN HYUCK (KR)
KANG MIN JEONG (KR)
Application Number:
PCT/KR2017/003447
Publication Date:
November 09, 2017
Filing Date:
March 29, 2017
Export Citation:
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Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08F14/06; C08F2/18; C08F2/20; C08F2/44; C08L1/26; C08L29/04
Foreign References:
JPH09278806A1997-10-28
KR20110006224A2011-01-20
JPH10279610A1998-10-20
JPH06107712A1994-04-19
JPH0641209A1994-02-15
Other References:
See also references of EP 3321294A4
None
Attorney, Agent or Firm:
BAE, KIM & LEE IP GROUP (KR)
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