发明名称 |
Method and apparatus for producing ethylene-vinyl acetate copolymer saponification product |
摘要 |
A method for producing a saponified ethylene-vinyl acetate copolymer (EVOH) comprises: supplying into a second reactor a solution containing the copolymer that is saponified partially with an alkali catalyst under a predetermined pressure in a first reactor; and saponifying further the partially-saponified copolymer in the second reactor under a pressure higher than the predetermined pressure in the first reactor. According to the method, an EVOH having a high saponification degree can be produced efficiently with a small amount of alkali catalyst. |
申请公布号 |
US6800687(B2) |
申请公布日期 |
2004.10.05 |
申请号 |
US20020221725 |
申请日期 |
2002.09.16 |
申请人 |
KURARAY CO., LTD. |
发明人 |
KAWAHARA TAKAHARU;OHARA YUKIHIRO;TUBOI TOSHIO;HIKASA TETSUYA |
分类号 |
C08F8/12;(IPC1-7):C08F8/00 |
主分类号 |
C08F8/12 |
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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