首页>
外国专利>
METHOD FOR PURIFYING 3,3',4,4'-BIPHENYL TETRACARBOXYLIC ACID DIANHYDRIDE POWDER AND POLYIMIDE USING THE SAME
METHOD FOR PURIFYING 3,3',4,4'-BIPHENYL TETRACARBOXYLIC ACID DIANHYDRIDE POWDER AND POLYIMIDE USING THE SAME
展开▼
机译：纯化3,3'，4,4'-联苯四羧酸二酐粉末和聚酰亚胺的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To provide a method for easily purifying little colored 3,3',4,4'-biphenyl tetracarboxylic acid dianhydride powder, and to obtain a highly transparent polyimide by using the little colored 3,3',4,4'-biphenyl tetracarboxylic acid dianhydride powder obtained by the method.;SOLUTION: In the method for purifying 3,3',4,4'-biphenyl tetracarboxylic acid dianhydride powder, a solvent with solubility at 25°C for 3,3',4,4'-biphenyl tetracarboxylic acid dianhydride of 0.1 g/100 g or higher and the 3,3',4,4'-biphenyl tetracarboxylic acid dianhydride powder are mixed together in the heterogeneous condition wherein at least a part of the 3,3',4,4'-biphenyl tetracarboxylic acid dianhydride powder does not dissolved, and subsequently the undissolved 3,3',4,4'-biphenyl tetracarboxylic acid dianhydride powder is separated to be collected from the mixed liquid.;COPYRIGHT: (C)2012,JPO&INPIT
展开▼
机译：解决的问题：提供一种容易纯化少着色的3,3'，4,4'-联苯四甲酸二羧酸二酐粉末的方法，并通过使用少着色的3,3'，4,4获得高度透明的聚酰亚胺通过该方法获得的'-联苯基四羧酸二酐粉末。解决方案：在纯化3,3'，4,4'-联苯基四羧酸二酐粉末的方法中，该溶剂在25℃下可溶解3,3'，将0.1 g / 100 g或更高的4,4'-联苯四羧酸二酐和3,3'，4,4'-联苯四羧酸二酐粉末在非均相条件下混合在一起，其中至少一部分3， 3'，4,4'-联苯四甲酸二酐粉末不溶解，随后将不溶的3,3'，4,4'-联苯四羧酸二酐粉末从混合液中分离出来; COPYRIGHT：（ C）2012，日本特许厅
展开▼
