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1. 发明授权

US06881803B2 Method for producing copolymer of alkylvinyl ether and maleic anhydride, and copolymer of alkylvinyl ether and meleic anhydride 失效
标题翻译：制备烷基乙烯基醚和马来酸酐的共聚物的方法，以及烷基乙烯基醚和马来酸酐的共聚物
公开(公告)号：US06881803B2
公开(公告)日：2005-04-19
申请号：US10033673
申请日：2001-12-28
申请人： Toshio Endo , Tatsumi Fujii , Yasuo Tsuji , Morihito Saito
发明人： Toshio Endo , Tatsumi Fujii , Yasuo Tsuji , Morihito Saito
IPC分类号： C08F6/12 , C08F216/16 , C08F222/06 , C08F2/00
CPC分类号： C08F222/06 , C08F6/12 , C08F216/16
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.
摘要翻译：在本发明的第一方面，公开了一种烷基乙烯基醚和马来酸酐的共聚物的制造方法，其包括在温度下除去反应中使用的有机溶剂，从而可以保持浆料状态。根据第一方面，可以获得如本发明第二方面所公开的含有少量溶剂的烷基乙烯基醚和马来酸酐的共聚物。此外，可以避免通过烷基乙烯基醚和马来酸酐的共聚物的制备方法降低烷基乙烯基醚和马来酸酐的共聚物的比粘度，其包括在聚合中屏蔽氧，如所公开的在本发明的第三方面。

2. 发明授权

US06800696B2 Method for producing copolymer of alkylvinyl ether and maleic anhydride, and copolymer of alkylvinyl ether and maleic anhydride 失效
标题翻译：制备烷基乙烯基醚和马来酸酐的共聚物的方法，以及烷基乙烯基醚和马来酸酐的共聚物
公开(公告)号：US06800696B2
公开(公告)日：2004-10-05
申请号：US10754979
申请日：2004-01-09
申请人： Morihito Saito
发明人： Morihito Saito
IPC分类号： C08F12008
CPC分类号： C08F222/06 , C08F6/12 , C08F216/16
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.
摘要翻译：在本发明的第一方面，公开了一种烷基乙烯基醚和马来酸酐的共聚物的制造方法，其包括在温度下除去反应中使用的有机溶剂，从而可以保持浆料状态。根据第一方面，可以获得如本发明第二方面所述的含有少量残留的溶剂的烷基乙烯基醚和马来酸酐的共聚物。此外，可以避免的是，烷基乙烯基醚和马来酸酐的共聚物的比粘度通过烷基乙烯基醚和马来酸酐的共聚物的制备方法降低，其包括在聚合中屏蔽氧，如本发明第三方面所公开的。

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