Title:
PROCESS FOR PREPARING ETHYLENE COPOLYMER THAT IS EASY TO EXTRUDE AND GRANULATE
Document Type and Number:
WIPO Patent Application WO/2021/177573
Kind Code:
A1
Abstract:
The present invention relates to a process for preparing an ethylene copolymer through a copolymerization reaction and extrusion and granulation steps using raw materials comprising ethylene and α-olefin, and relates to a process for preparing an ethylene copolymer that is easy to extrude and granulate, in which the temperature of a copolymer resin to be introduced into an extruder is lowered in advance, thereby enabling the copolymer resin to be maintained in strand form at the rear of the extruder and be easily extruded and granulated. To this end, the present invention provides a process for preparing an ethylene copolymer, the process comprising: a preparation step of preparing raw materials comprising ethylene and α-olefin; a copolymerization step of copolymerizing the raw materials to prepare a copolymer resin composition; an impurity removal step of removing impurities by allowing the prepared copolymer resin composition to pass through a separation unit, and preparing a copolymer resin; an extrusion step of introducing and extruding the prepared copolymer resin into/through an extruder; and a granulation step of granulating the extruded copolymer resin, wherein, before the copolymer resin is introduced into the extruder, a cooling step before extrusion of lowering the temperature of the copolymer resin is performed.
Inventors:
JUN SUNG HAE (KR)
KIM NA YEUN (KR)
KIM JI SUNG (KR)
KIM HAK MIN (KR)
PARK JE HUN (KR)
HEO EUN JUNG (KR)
KIM NA YEUN (KR)
KIM JI SUNG (KR)
KIM HAK MIN (KR)
PARK JE HUN (KR)
HEO EUN JUNG (KR)
Application Number:
PCT/KR2020/019389
Publication Date:
September 10, 2021
Filing Date:
December 30, 2020
Export Citation:
Assignee:
HANWHA SOLUTIONS CORP (KR)
International Classes:
C08F210/16; B29B9/10; B29B9/16; B29B13/06; C08F2/01; C08F6/08
Foreign References:
| KR20180125531A | 2018-11-23 | |||
| JP2010527390A | 2010-08-12 | |||
| KR101378892B1 | 2014-04-04 | |||
| JPH06228323A | 1994-08-16 | |||
| US20070080476A1 | 2007-04-12 | |||
| US6573314B1 | 2003-06-03 |
Attorney, Agent or Firm:
KIM, Chang Deok (KR)
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