Ethylene-vinyl alcohol copolymer resin composition, film, and multilayer structure

• Main Authors: NAKAI YOSHIHIRO, NAKAJIMA TAKUYA, TAKESHITA KEISUKE, KUDO KENJI, UCHIDA HISAO
• Format: Patent
• Language: Chinese; English
• Published: 11.03.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The present invention provides an ethylene-vinyl alcohol copolymer resin composition which contains an ethylene-vinyl alcohol copolymer (X) and a metal compound and satisfies formula (1) as an ethylene-vinyl alcohol copolymer resin composition having excellent gas barrier properties under high humidity, particularly excellent oxygen barrier properties under high humidity. Delta A2 is equal to A2-A2, 0gt; (1) (A2 represents a second virie coefficient when static light scattering measurement is performed on the ethylene-vinyl alcohol copolymer resin composition using hexafluoroisopropanol as a solvent, and A2 and 0 represent the second virie coefficient of the ethylene-vinyl alcohol copolymer (X) in the ethylene-vinyl alcohol copolymer composition when the same measurement is performed. ). 作为高湿度下的阻气性、特别是高湿度下的氧气阻隔性优异的乙烯-乙烯醇系共聚物树脂组合物，本发明提供一种乙烯-乙烯醇系共聚物树脂组合物，其含有乙烯-乙烯醇系共聚物(X)和金属化合物，且满足下述式(1)。ΔA2＝A2-A2,0>0···(1)(上述A2表示使用六氟异丙醇作为溶剂、并进行上述乙烯-乙烯醇系共聚物树脂组合物的静态光散射测定时的第二维里系数，A2,0表示相同测定时上述乙烯-乙烯醇系共聚物组合物中的乙烯-乙烯醇系共聚物(X)的第二维里系数。)。