Title:
METHOD FOR PRODUCING MODIFIED ETHYLENE-VINYL ALCOHOL COPOLYMER AND RESIN COMPOSITION INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2023/120705
Kind Code:
A1
Abstract:
A method for producing a modified ethylene-vinyl alcohol copolymer (C), the method including reacting an ethylene-vinyl alcohol copolymer (A) and a C2-8 monovalent epoxy compound (B) through melt kneading in an extruder using a catalyst solution (D) that is an acetone solution containing zinc ions (F) and sulfonate ions. In this method, it is preferable to use 0.05-1.0 μmol/g of zinc ions (F) in terms of the number of mol relative to the mass of the ethylene-vinyl alcohol copolymer (A). Also, it is preferable to add a mixture of the monovalent epoxy compound (B) and the catalyst solution (D) to the molten ethylene-vinyl alcohol copolymer (A). There is thereby provided a method for producing modified EVOH having exceptional melt stability as well as exceptional barrier properties, stretchability, and the like.
Inventors:
SOMEMIYA KAZUYUKI (JP)
MORIHARA YASUSHI (JP)
MORIHARA YASUSHI (JP)
Application Number:
PCT/JP2022/047645
Publication Date:
June 29, 2023
Filing Date:
December 23, 2022
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08F8/08; C08F216/14; C08L23/00; C08L29/04; C08L29/10
Domestic Patent References:
| WO2011125739A1 | 2011-10-13 | |||
| WO2002092643A1 | 2002-11-21 | |||
| WO2014024912A1 | 2014-02-13 | |||
| WO2012165441A1 | 2012-12-06 |
Foreign References:
| JP2004160755A | 2004-06-10 | |||
| JP2015083665A | 2015-04-30 |
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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