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公开(公告)号：US20050059778A1
公开(公告)日：2005-03-17
申请号：US10937780
申请日：2004-09-10
申请人： Hisamichi Yanai , Yoshihiro Tokuda , Jin Tokuyasu , Kimiko Miyata , Naoki Fujiwara , Takeshi Kusudou
发明人： Hisamichi Yanai , Yoshihiro Tokuda , Jin Tokuyasu , Kimiko Miyata , Naoki Fujiwara , Takeshi Kusudou
CPC分类号： C08J3/05 , C08F8/12 , C08J3/12 , C08J2329/04 , C08F118/08
摘要： The present invention provides polyvinyl alcohol based (PVA) whose solubility in water varies with a small temperature change to a sufficiently great degree. In manufacturing a polyvinyl alcohol based polymer by: progressing a transesterification reaction of a polyvinyl ester based polymer with alcohol in a liquid reaction mixture including the polyvinyl ester based polymer, the alcohol, and a basic compound; precipitating the polyvinyl ester based polymer, at least a part of which has been transesterified with the alcohol, out of the liquid reaction mixture; and further progressing the transesterification reaction in the liquid reaction mixture including the polyvinyl ester based polymer that has precipitated, the liquid reaction mixture has a temperature of 75° C. to 150° C. when the polyvinyl ester based polymer, at least a part of which has been transesterified, starts precipitating.
摘要翻译： 本发明提供了其在水中的溶解度随着温度变化小而充分变化的聚乙烯醇系（PVA）。 在制造聚乙烯醇类聚合物时，通过以下方法制造聚乙烯醇类聚合物：在含有聚乙烯基酯类聚合物，醇类和碱性化合物的液体反应混合物中进行聚乙烯酯系聚合物与醇的酯交换反应， 将至少一部分已经与醇酯交换的聚乙烯基酯类聚合物从液体反应混合物中沉淀出来; 并进一步进行包含已沉淀的聚乙烯基酯类聚合物的液体反应混合物中的酯交换反应，当聚乙烯基酯类聚合物的至少一部分时，液体反应混合物的温度为75℃〜150℃ 已被酯交酯反应开始沉淀。
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公开(公告)号：US07439300B2
公开(公告)日：2008-10-21
申请号：US10937780
申请日：2004-09-10
申请人： Hisamichi Yanai , Yoshihiro Tokuda , Jin Tokuyasu , Kimiko Miyata , Naoki Fujiwara , Takeshi Kusudou
发明人： Hisamichi Yanai , Yoshihiro Tokuda , Jin Tokuyasu , Kimiko Miyata , Naoki Fujiwara , Takeshi Kusudou
IPC分类号： C08F8/12 , C08F116/06
CPC分类号： C08J3/05 , C08F8/12 , C08J3/12 , C08J2329/04 , C08F118/08
摘要： The present invention provides polyvinyl alcohol based (PVA) whose solubility in water varies with a small temperature change to a sufficiently great degree. In manufacturing a polyvinyl alcohol based polymer by: progressing a transesterification reaction of a polyvinyl ester based polymer with alcohol in a liquid reaction mixture including the polyvinyl ester based polymer, the alcohol, and a basic compound; precipitating the polyvinyl ester based polymer, at least a part of which has been transesterified with the alcohol, out of the liquid reaction mixture; and further progressing the transesterification reaction in the liquid reaction mixture including the polyvinyl ester based polymer that has precipitated, the liquid reaction mixture has a temperature of 75° C. to 150° C. when the polyvinyl ester based polymer, at least a part of which has been transesterified, starts precipitating.
摘要翻译： 本发明提供了其在水中的溶解度随着温度变化小而充分变化的聚乙烯醇系（PVA）。 在制造聚乙烯醇类聚合物时，通过以下方法制造聚乙烯醇类聚合物：在含有聚乙烯基酯类聚合物，醇类和碱性化合物的液体反应混合物中进行聚乙烯酯系聚合物与醇的酯交换反应， 将至少一部分已经与醇酯交换的聚乙烯基酯类聚合物从液体反应混合物中沉淀出来; 并进一步进行包含已沉淀的聚乙烯基酯类聚合物的液体反应混合物中的酯交换反应，当聚乙烯基酯类聚合物的至少一部分时，液体反应混合物的温度为75℃〜150℃ 已被酯交酯反应开始沉淀。
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