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1.发明授权公开(公告)号：US11697710B2
公开(公告)日：2023-07-11
申请号：US16533911
申请日：2019-08-07
发明人： YanYan Jiang , ZhenZhong Wang , Xi Ren , Wei Zhang
CPC分类号： C08G73/1067 , B29C41/003 , B29C41/46 , C08G73/1021 , C08G73/1032 , C08G73/1078 , C08J5/18 , B29K2079/08 , B29K2995/0026 , B29L2007/008 , C08J2379/08 , H10K77/111
摘要： A polyimide film contains fluorinated substituents and cardo structures. The polyimide film exhibits excellent heat-resistance, transparency and mechanical properties. The polyimide film has a glass-transition temperature (Tg) of at least 360° C., a coefficient of thermal expansion (CTE) of 50 ppm/° C. or lower, a modulus of at least 4.0 Gpa, a b* value of 5 or lower and yellowness index of 8 or less. The polyimide film can be used as a display substrate or an optical film in a liquid crystal display (LCD), an organic light-emitting diode (OLED) and in other fields where the characteristic features are required.
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2.发明公开公开(公告)号：US20230303786A1
公开(公告)日：2023-09-28
申请号：US18198304
申请日：2023-05-17
发明人： Zhenzhong Wang , Changdan Tang , Zhaorong Li
CPC分类号： C08J5/18 , C08G73/1007 , C08G73/1039 , C08G73/1042 , C08G73/1078 , C08G73/1085 , C08J2379/08
摘要： Disclosed in the present disclosure are an ultra-high modulus and high-transmittance polyimide thin film, and a preparation method and application therefor. The ultra-high modulus and high-transmittance polyimide thin film is prepared by means of mixing and dissolving polydiamine and polydianhydride in a solvent, adding an end-capping reagent, and performing polymerization reaction and imidization. The ultra-high modulus and high-transmittance polyimide thin film has an ultra-high modulus and high transmittance, and is applicable to fields such as flexible photoelectricity and aerospace, especially to a structural member, a reinforcement layer or a substrate of flexible display and transparent display.
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