Title:
METHOD FOR PRODUCING CHLORINATED POLYVINYL CHLORIDE RESIN
Document Type and Number:
WIPO Patent Application WO/2019/083280
Kind Code:
A3
Abstract:
The present invention relates to a method for producing a chlorinated polyvinyl chloride resin. More specifically, the present invention provides a method for producing a chlorinated polyvinyl chloride resin, the method comprising a neutralization step of a) realizing pH of 2-5 by using a metal hydroxide as a first neutralizing agent, and b) completing neutralization by using a carbonate-based compound as a second neutralizing agent, so that residual hydrochloric acid in pores of the chlorinated polyvinyl chloride resin obtained in the chlorination process of polyvinyl chloride or a vinyl chloride copolymer can be efficiently removed, and the extrusion appearance of a processed article together with thermal stability can be improved.
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Inventors:
KIM YANG JUNG (KR)
HONG KI WON (KR)
LEE WOO YOUNG (KR)
JIN SEON JEONG (KR)
HONG KI WON (KR)
LEE WOO YOUNG (KR)
JIN SEON JEONG (KR)
Application Number:
PCT/KR2018/012661
Publication Date:
June 13, 2019
Filing Date:
October 24, 2018
Export Citation:
Assignee:
HANWHA CHEMICAL CORP (KR)
International Classes:
C08F8/20; C08F6/02; C08F14/06
Foreign References:
| KR101654147B1 | 2016-09-05 | |||
| JP2006322013A | 2006-11-30 | |||
| JPH11158221A | 1999-06-15 | |||
| JP2004307717A | 2004-11-04 | |||
| US5359011A | 1994-10-25 | |||
| EP0053615B1 | 1985-01-16 | |||
| KR101860149B1 | 2018-05-21 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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