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    • 3. 发明授权
    • Method for preparing N-substituted maleimides
    • 制备N-取代马来酰亚胺的方法
    • US08283477B2
    • 2012-10-09
    • US12999420
    • 2009-06-24
    • Jin-Eok KimSeung-il KimHan-Jin Kwag
    • Jin-Eok KimSeung-il KimHan-Jin Kwag
    • A61K31/4015A61K31/402C07D207/40
    • C07D207/448
    • The present invention relates to a method of preparing N-substituted maleimide in high purity and high yield, wherein, unlike a conventional method of preparing N-substituted maleimide after preparing N-substituted maleamic acid, an organic solvent, an acid catalyst, a dehydration co-catalyst and a stabilizer are added into a reactor without separately preparing N-substituted maleamic acid, and then a primary amine is added into the reactor to form an amine salt, maleic anhydride is added into the reactor, and the resulting mixture is subjected to a dehydration-cyclization reaction, wherein water produced during the reaction is azeotropically distilled with the organic solvent so as to effectively suppress formation of a maleimide polymer. Particularly, the invention simplifies the process, has high yield, minimizes side reactions, eliminates the introduction of expensive raw materials and the complicated treatment of the reaction solution and significantly shortens the time over which the raw materials and maleic anhydride are added.
    • 本发明涉及以高纯度和高收率制备N-取代马来酰亚胺的方法,其中与制备N-取代马来酰胺酸,有机溶剂,酸催化剂,脱水剂的常规制备N-取代马来酰亚胺的方法不同 助催化剂和稳定剂加入到反应器中,而无需单独制备N-取代的马来酰胺酸,然后将伯胺加入到反应器中以形成胺盐,将马来酸酐加入到反应器中,并将所得混合物 进行脱水 - 环化反应,其中在反应期间产生的水与有机溶剂共沸蒸馏,以有效抑制马来酰亚胺聚合物的形成。 特别地,本发明简化了方法,具有高产率,最小化副反应,消除了昂贵原料的引入和复杂的反应溶液处理,并显着缩短了添加原料和马来酸酐的时间。
    • 4. 发明申请
    • Method for Preparing N-Substituted Maleimides
    • N-取代的马来酰亚胺的制备方法
    • US20110124882A1
    • 2011-05-26
    • US12999420
    • 2009-06-24
    • Jin-Eok KimSeung-il KimHan-Jin Kwag
    • Jin-Eok KimSeung-il KimHan-Jin Kwag
    • C07D207/448
    • C07D207/448
    • The present invention relates to a method of preparing N-substituted maleimide in high purity and high yield, wherein, unlike a conventional method of preparing N-substituted maleimide after preparing N-substituted maleamic acid, an organic solvent, an acid catalyst, a dehydration co-catalyst and a stabilizer are added into a reactor without separately preparing N-substituted maleamic acid, and then a primary amine is added into the reactor to form an amine salt, maleic anhydride is added into the reactor, and the resulting mixture is subjected to a dehydration-cyclization reaction, wherein water produced during the reaction is azeotropically distilled with the organic solvent so as to effectively suppress formation of a maleimide polymer. Particularly, the invention simplifies the process, has high yield, minimizes side reactions, eliminates the introduction of expensive raw materials and the complicated treatment of the reaction solution and significantly shortens the time over which the raw materials and maleic anhydride are added.
    • 本发明涉及以高纯度和高收率制备N-取代马来酰亚胺的方法,其中与制备N-取代马来酰胺酸,有机溶剂,酸催化剂,脱水剂的常规制备N-取代马来酰亚胺的方法不同 助催化剂和稳定剂加入到反应器中,而无需单独制备N-取代的马来酰胺酸,然后将伯胺加入到反应器中以形成胺盐,将马来酸酐加入到反应器中,并将所得混合物 进行脱水 - 环化反应,其中在反应期间产生的水与有机溶剂共沸蒸馏,以有效抑制马来酰亚胺聚合物的形成。 特别地,本发明简化了方法,具有高产率,最小化副反应,消除了昂贵原料的引入和复杂的反应溶液处理,并显着缩短了添加原料和马来酸酐的时间。
    • 8. 发明授权
    • Method of preparing cyclic olefin copolymer having controlled gel contents
    • 制备具有受控凝胶含量的环烯烃共聚物的方法
    • US07468417B2
    • 2008-12-23
    • US11467100
    • 2006-08-24
    • Youngchan JangHyun-Kyung SungHan Jin Kwag
    • Youngchan JangHyun-Kyung SungHan Jin Kwag
    • C08G61/08C08F2/38C08F4/78
    • C08G61/08
    • The present invention relates to a method of preparing a copolymer having controlled gel content by polymerizing cyclic olefin compound by ROMP (Ring Opening Metathesis Polymerization), and more precisely, a method of preparing cyclic olefin copolymer with high yield, in which a complex prepared by mixing a W salt compound and an organoaluminum halide compound is used as a catalyst in the presence or absence of a molecular weight regulator, and a method of controlling gel formation by regulating the composition of cyclic olefin monomer composing a copolymer as shown in the following Empirical Formula 1 without using a reaction speed regulator or gel formation inhibitor. (Empirical Formula 1) Norbornene=30˜70 weight % Cyclic olefin compound=70˜30 weight % At this time, the cyclic olefin compound presented in the above Empirical Formula 1 is one or more compounds selected from a group consisting of dicyclopentadiene and compounds represented by the following Formula 1. Wherein, m is an integer of 0-1, R1 is C1-C5 alkyl and R2 is H or C1-C10 alkyl.
    • 本发明涉及通过ROMP(开环复分解聚合)聚合环烯烃化合物制备具有控制凝胶含量的共聚物的方法,更确切地说,一种以高产率制备环烯烃共聚物的方法,其中将由 在存在或不存在分子量调节剂的情况下,将W盐化合物和有机铝卤化物混合物用作催化剂,以及通过调节构成共聚物的环烯烃单体的组成来控制凝胶形成的方法,如以下实验 式1不使用反应速度调节剂或凝胶形成抑制剂。 (实验式1)降冰片烯= 30〜70重量%环状烯烃化合物= 70〜30重量%此时,上述实验式1中所示的环状烯烃化合物是选自二环戊二烯和化合物 其中m为0-1的整数,R1为C1-C5烷基,R2为H或C1-C10烷基。