申请人:IKEDA Kaoru
公开号:US20100280178A1
公开(公告)日:2010-11-04
Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.
提供的是一种改性乙烯-醇酸共聚物(C),其乙烯含量为5至55摩尔%,其中含有特定的结构单元(I),其量为0.3至40摩尔%,可以通过将乙烯-醇酸共聚物(A)与分子量不超过500的单官能环氧化合物(B)反应而获得。可以通过在挤出机中熔融和揉捏乙烯-醇酸共聚物(A)和单官能环氧化合物(B)来生产改性乙烯-醇酸共聚物(C)。由于其中包含了特定的结构单元(I),改性乙烯-醇酸共聚物(C)在透明度、可伸展性、柔韧性和弯曲抗力方面优于未改性的乙烯-醇酸共聚物(A),因此可以用作需要上述性能能力的各种应用中的障壁材料。