发明名称 |
Method for producing copolymer of alkylvinyl ether and maleic anhydride, and copolymer of alkylvinyl ether and meleic anhydride |
摘要 |
In the first aspect of the present invention, there is disclosed a method for producing a copolymer of an alkyl vinyl ether and maleic anhydride which comprises removing an organic solvent used in a reaction under a temperature so that a slurry state can be maintained. According to the first aspect, such a copolymer of the alkyl vinyl ether and maleic anhydride which contains a little amount of the solvent remaining therein as disclosed in the second aspect of the present invention, can be obtained. Further, it can be avoided that a specific viscosity of the copolymer of the alkyl vinyl ether and maleic anhydride is lowered, by means of a method for producing a copolymer of alkyl vinyl ether and maleic anhydride which comprises shielding oxygen in a polymerization, as disclosed in the third aspect of the present invention.
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申请公布号 |
US6881803(B2) |
申请公布日期 |
2005.04.19 |
申请号 |
US20010033673 |
申请日期 |
2001.12.28 |
申请人 |
DAICEL CHEMICAL INDUSTRIES LTD. |
发明人 |
ENDO TOSHIO;FUJII TATSUMI;TSUJI YASUO;SAITO MORIHITO |
分类号 |
C08F6/12;C08F216/16;C08F222/06;(IPC1-7):C08F2/00 |
主分类号 |
C08F6/12 |
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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