Polyimide precursor, precursor composition, polyimide, high-temperature-resistant transaprent polyimide film and preparation method of high-temperature-resistant transaprent polyimide film

A polyimide precursor and transparent polyimide technology, which is applied in the field of polymer material synthesis, can solve the problems of high transparent polyimide heat resistance and mechanical performance degradation, achieve good light transmittance, improve Regularity, the effect of improving efficiency
CN109734907AActive Publication Date: 2019-05-10株洲时代华昇新材料技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
株洲时代华昇新材料技术有限公司
Publication Date
2019-05-10

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Abstract

The invention discloses a polyimide precursor, a precursor composition, polyimide, high-temperature-resistant transaprent polyimide film and a preparation method of the high-temperature-resistant transaprent polyimide film. The polyimide precursor is polyamide acid having a general formula which is shown in the description, wherein A is a structural unit derived from a diamine, B1 is a structuralunit derived from a main dianhydride, B2 is a structural unit derived from a control dianhydride, and the control dianhydride is from one or more than two of the structures which are shown in the description; the high-temperature-resistant transaprent polyimide film is prepared with the precursor composition by means of a thermal imidization process or a chemical imidization process. The high-heat-resistant colorless transparent polyimide herein has light transmittance of up to 88% and above, for example, 88-90%, has glass transition temperature of 336 DEG C and above, for instance, 336-360 DEG C, and further 350-360 DEG C, and has coefficient of linear expansion of 15-21 ppm / K, tensile strength of 109-120 MPa and elongation at break of 20-26%.
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Description

technical field

[0001] The invention belongs to the field of polymer material synthesis, and in particular relates to a polyimide precursor, a precursor composition, a high-temperature-resistant transparent polyimide film and a preparation method thereof. Background technique

[0002] With the development of science and technology, the display field is gradually developing in the direction of large-scale, thin and flexible. The use of flexible transparent polymers to replace traditional hard glass in display devices is a key technology to achieve flexible displays. Polyimide has outstanding heat resistance and can withstand high-temperature processes such as electrode film deposition and annealing during the display process, and has attracted widespread attention in the industry.

[0003] Due to the strong intermolecular and intramolecular interactions in the molecular structure of traditional aromatic polyimides, it is easy to form a charge transfer complex between the ele...

Claims

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