(19)
(11) EP 3 348 596 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
05.09.2018 Bulletin 2018/36

(43) Date of publication:
18.07.2018 Bulletin 2018/29

(21) Application number: 17763567.9

(22) Date of filing: 08.03.2017
(51) International Patent Classification (IPC): 
C08G 64/34(2006.01)
C08J 3/09(2006.01)
 C08G 64/40(2006.01)
B29B 9/06(2006.01)
(86) International application number:
PCT/KR2017/002521
(87) International publication number:
WO 2017/155306 (14.09.2017 Gazette 2017/37)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 11.03.2016 KR 20160029833

(71) Applicant: LG Chem, Ltd.
Seoul 07336 (KR)

(72) Inventors:
  • LEE, Jun Wye
    Daejeon 34122, (KR)
  • PARK, Seung Young
    Daejeon 34122, (KR)
  • LEE, Jin Woo
    Daejeon 34122, (KR)
  • CHO, Hyun Ju
    Daejeon 34122, (KR)
  • SOHN, Jung Min
    Daejeon 34122, (KR)
  • KIM, Yoon Yung
    Daejeon 34122, (KR)
  • SEONG, Bo Hyun
    Daejeon 34122, (KR)
  • JUNG, Taek Jun
    Daejeon 34122, (KR)
  • CHO, Yun Ki
    Daejeon 34122, (KR)
  • AN, Yong Hee
    Daejeon 34122, (KR)
  • KIM, Sung-Kyoung
    Daejeon 34122, (KR)
  • KIM, Hyun Min
    Daejeon 34122, (KR)

(74) Representative: Goddar, Heinz J. 
Boehmert & Boehmert Anwaltspartnerschaft mbB Pettenkoferstrasse 22
80336 München
80336 München (DE)

   


(54) METHOD FOR ECONOMICAL PRODUCING OF RESIN COMPOSITION COMPRISING POLYALKYLENE CARBONATE WITH IMPROVED THERMAL STABILITY AND PROCESSABILITY


(57) The present disclosure relates to an economical method of preparing a resin composition including a polyalkylene carbonate with improved thermal stability and processability. More specifically, the method of preparing a resin composition includes the steps of polymerizing carbon dioxide and an epoxide compound in the presence of a zinc-based catalyst and a solvent, recovering monomers, removing the catalyst and recovering raw materials, solution-blending with a thermostable resin to improve the thermal stability and processability, and removing the solvent and byproducts from the reaction mixture by using an agitated flash drum and an extrusion or kneader-type devolatilizer.