ETHYLENE-VINYL ALCOHOL COPOLYMER, RESIN COMPOSITION, AND MULTILAYER STRUCTURE

Japanese Patent JP2016028139

A

PROBLEM TO BE SOLVED: To provide: an ethylene-vinyl alcohol copolymer with excellent appearance, capable of having excellent long-run workability in melt-molding, preventing film defects such as film flaws and streaks, and suppressing coloration; a resin composition; and a multilayer structure.SOLUTION: The ethylene-vinyl alcohol copolymer of the present invention is obtained by saponifying a copolymer of ethylene and vinyl ester; and the ethylene-vinyl alcohol copolymer has a molecular weight satisfying expression (1) (Ma-Mb)/Ma<0.45, which is measured by using a gel permeation chromatograph equipped with a differential refractive index detector and an ultraviolet-visible light absorbance detector, after performing heat treatment at 220°C in a nitrogen atmosphere for 50 hours. In expression (1), Ma represents a molecular weight in terms of a polymethyl methacrylate at the maximum value of a peak measured by the differential refractive index detector; and Mb represents a molecular weight in terms of a polymethyl methacrylate at the maximum value of an absorption peak at a wavelength of 220 nm measured by the ultraviolet-visible light absorbance detector.SELECTED DRAWING: None

WO/2020/053393	METHOD FOR THE HYDROLYSIS OF A POLYMER
JP2007261074	MULTILAYERED STRETCHED FILM

KAWAI HIROSHI
FUJIOKA SHUNSUKE
MIYAKE HATSUYO

JP2015139175A

February 25, 2016

July 10, 2015

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KURARAY CO

C08F8/12; B32B27/30; C08F210/02; C08F216/06; C08K5/098; C08L29/04

JP2002194009A	2002-07-10
JP2012021168A	2012-02-02
JP2009242645A	2009-10-22
JP2010077352A	2010-04-08
JP2001106920A	2001-04-17

Hajime Amano

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