Method for producing a polyimide varnish
By using a specific imidization reaction of tetracarboxylic dianhydride and diamine under an alkaline catalyst and a lactone-based solvent, the problem of balancing colorless transparency and mechanical properties of polyimide resin was solved, resulting in polyimide films with high elastic modulus and excellent colorless transparency, while avoiding the use of perfluoroalkyl compounds.
CN122249491APending Publication Date: 2026-06-19MITSUBISHI GAS CHEM CO INC
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MITSUBISHI GAS CHEM CO INC
- Filing Date
- 2024-12-04
- Publication Date
- 2026-06-19
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Figure CN122249491A_ABST
Abstract
A method for manufacturing a polyimide varnish includes a step of imidizing a tetracarboxylic acid dianhydride comprising a compound shown in formula (a1) and a compound shown in formula (a2) with a diamine comprising a compound shown in formula (b1) in the presence of an alkaline catalyst and an organic solvent comprising a lactone-based solvent. According to the aforementioned method for manufacturing a polyimide varnish, a polyimide film having a high elastic modulus and excellent colorless transparency can be obtained, and a polyimide varnish containing a solvent-soluble polyimide resin can be obtained.
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