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公开(公告)号：US11414507B2
公开(公告)日：2022-08-16
申请号：US17256843
申请日：2019-07-04
申请人： KURARAY CO., LTD.
发明人： Tadahito Fukuhara , Yoko Nakano , Masato Nakamae
IPC分类号： C08F216/06
摘要： The present invention provides a modified vinyl alcohol polymer having a side chain with an ethylenic double bond, and having reduced a water-insoluble content and superior storage stability in the form of an aqueous solution, methods of making thereof, a modified vinyl alcohol polymer (A) having a degree of saponification of 68 mol % or more and less than 99.9 mol %, and a viscosity-average degree of polymerization of 200 or more and less than 3,000, and comprising a side chain with 0.01 mol % or more and less than 0.50 mol % of a double bond derived from an esterification agent, the esterification agent being one or more selected from the group consisting of (i) itaconic acid and/or derivatives thereof, and (ii) methacrylic acid and/or derivatives thereof, and the modified vinyl alcohol polymer (A) having a peak width W0.05h of at least 2.85 minutes and less than 3.70 minutes at a height of 5% from the baseline in a peak measured by HPLC.
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公开(公告)号：US10392495B2
公开(公告)日：2019-08-27
申请号：US14779179
申请日：2013-03-22
申请人： KURARAY CO., LTD.
发明人： Yoshiaki Asanuma , Yoko Nakano
摘要： A composition including 100 parts by mass of a polyvinyl acetal and 30 to 70 parts by mass of a plasticizer including 0.5 to 100% by mass of a plasticizer containing a polar group and 0 to 99.5% by mass of a plasticizer containing no polar group, a total of the plasticizer containing a polar group and the plasticizer containing no polar group being 100% by mass. When the polyvinyl acetal is analyzed by HPLC using an ODS column having an inner diameter of 4 mm and a length of 1 cm, the polyvinyl acetal exhibits a first peak and a second peak derived from polyvinyl acetals. In addition, a laminated product of a layer including a polyvinyl acetal and a layer including a hydrocarbon-based polymer.
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