CAS: 50662-95-8; 3,4'-Oxydiphthalic Anhydride

2,3,3',4'-Diphenyl Ether Tetracarboxylic Acid置于乙酸酐体系中,用 甲苯 作为反应溶剂,化学反应生成 3,4'-氧双邻苯二甲酸酐
参考文献:2,3,3',4'-二苯醚四甲酸二酐的制备方法
标题:2,3,3',4'-二苯醚四甲酸二酐的制备方法
摘要:本发明公开了一种2,3,3',4'‑二苯醚四甲酸二酐的制备方法,包括3‑氯代苯酐和苯胺经酰胺化反应得到第一中间体,第一中间体与3,4‑二甲基苯酚经缩合反应得到第二中间体,第二中间体在高温高压条件下用硝酸同时氧化和水解得到2,3,3',4'‑二苯醚四甲酸,脱水成酐得到2,3,3',4'‑二苯醚四甲酸二酐.本发明的方法采用苯胺与3‑氯代苯酐进行酰胺化反应,这样得到的是含有苯基的第二中间体,该第二中间体能够在高温高压条件下,用硝酸同时氧化和水解得到2,3,3',4'‑二苯醚四甲酸,不仅反应步骤较短,而且避免了采用高锰酸钾氧化对环境不友好的问题,尤其是水解反应条件更简单,反应时间更短,反应效果更好,产物纯度较高.

专利信息

专利号:US-2025054696-A1
优先权日:2023-08-10
标 题:Thin film capacitor
发明人：CHO WEI-YU
权利人:META SYNTHESIS MAT CO LTD
摘要:A thin film capacitor is provided. The thin film capacitor includes a dielectric layer and a conductive layer. The dielectric layer includes polyimide and conductive particles. The polyimide includes ether linkages. Based on 100 weight parts of the polyimide, a total amount of monomer units including the ether linkages is 50 weight parts to 100 weight parts. Based on 100 weight parts of the dielectric layer, a total amount of the conductive particles is 10 weight parts to 70 weight parts. The conductive layer is disposed on a surface of the dielectric layer.

专利号:US-11136286-B2
优先权日:2017-01-27
标题:Diamine compound, and polyimide compound and molded product using the same
发明人：GOSHIMA TOSHIYUKI; SOE WIN MAW
权利人:WINGO TECH CO LTD
摘要:[Problems to be solved] The present invention provides a novel diamine compound which allows for the synthesis of a polyimide compound having a high solubility in an organic solvent and a high melt moldability.[Solution] The diamine compound according to the present invention is characterized by being represented by the following general formula (1):(whereinR1 to R8 are each independently selected from the group consisting of a hydrogen atom, a fluorine atom, a substituted or unsubstituted alkyl group, and a substituted or unsubstituted aromatic group; and at least one of R1 to R8 is a substituted or unsubstituted aromatic group).

专利号:CN-111072962-A
优先权日:2019-12-20
标题:Synthesis and Application of Photosensitive Polyimide for High Temperature Resistant Optical Fiber Coatings

专利号:CN-111072962-B
优先权日:2019-12-20
标 题:Synthesis and Application of Photosensitive Polyimide for High Temperature Resistant Optical Fiber Coatings