发明名称 |
ETHYLENE-VINYL ALCOHOL BASED COPOLYMER AND METHOD FOR PRODUCTION THEREOF |
摘要 |
<p>The present invention provides an ethylene-vinyl alcohol based copolymer (EVOH) having fundamentally improved thermal stability. The EVOH is characterized in that the proportion of ethylene units (III) is from 20 to 60 mole % with respect to the total (III + IV + V) of ethylene units (III), vinyl alcohol units (IV), and vinyl ester units (V), and the proportion of the total (I + II) of carboxylic acids units (I) and lactone ring units (II) in copolymer terminals with respect to the total (III + IV + V) is 0.12 mole % or less. The EVOH can be obtained by, for example, contacting a reducing agent with an ethylene-vinyl ester based copolymer before saponification and/or EVOH after saponification.</p> |
申请公布号 |
EP1612228(B1) |
申请公布日期 |
2011.08.24 |
申请号 |
EP20040724869 |
申请日期 |
2004.03.31 |
申请人 |
KURARAY CO., LTD. |
发明人 |
UCHIUMI, NAOHIKO,;WAKUI, TAKASHI, |
分类号 |
C08F216/06;C08F8/12;C08L29/04 |
主分类号 |
C08F216/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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