A kind of preparation method of hyperbranched polyimide film with low dielectric constant
A technology of polyimide film and low dielectric constant, which is applied in the field of hyperbranched polyimide film preparation, can solve the problems of microporous structure collapse and low Dk, and achieve outstanding heat resistance, low dielectric constant, The effect of lowering the dielectric constant
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Embodiment 1
[0041] Add 0.8342g of 2,4,6-triaminopyrimidine (TAP), 2.9422g of BPDA and 15g of o-cresol to the reaction vessel equipped with mechanical stirring successively, protect with argon, turn on the stirring and cool down the system until the temperature of the system drops When the temperature reaches 5°C, add 0.25g of quinoline, continue to stir for 4h, then react at 70°C for 3h, then raise the temperature of the system to 140°C for 24h; after the reaction, pour the reaction liquid into A solid product was precipitated in 140 mL of methanol, and the crude product F was obtained after filtration. The crude product F was washed 3 times with 60 mL of methanol to afford the product G. The product G was extracted with 70 mL methanol for 24 h in a Soxhlet extractor to obtain product H. Dry the product H in a vacuum oven for 12 hours with the temperature controlled at 120°C to obtain product J; dissolve 1 g of product J in 19 g of chloroform, filter through a tetrafluoro filter element ...
Embodiment 2
[0043] Add 0.4171g of 2,4,6-triaminopyrimidine (TAP), 2.0526g of BAPP, 2.9422g of a-BPDA and 16g of p-cresol to the reaction vessel equipped with mechanical agitation in turn, under argon protection, turn on the stirring and give the system Cool down, when the temperature of the system drops to 1°C, add 0.4g of isoquinoline, continue stirring for 5h, then react at 80°C for 4h, then raise the temperature of the system to 160°C, and react for 30h; after the reaction, cool the system to At 25°C, the reaction solution was poured into 130 mL of ethanol to precipitate a solid product, and the crude product F was obtained after filtration. The crude product F was washed 4 times with 50 mL of ethanol to obtain product G. Product G was extracted with 65 mL ethanol for 30 h in a Soxhlet extractor to obtain product H. Dry the product H in a vacuum oven for 15 hours with the temperature controlled at 130°C to obtain product J; dissolve 2 g of product J in 32 g of dichloromethane, filter ...
Embodiment 3
[0045] Add 0.5005g of 2,4,6-triaminopyrimidine (TAP), 1.3371g of 6FBA, 3.1022g of ODPA and 12g of m-cresol to the reaction vessel equipped with mechanical stirring successively, and protect it with argon, turn on the stirring and cool down the system, When the temperature of the system drops to 4°C, add 0.5g of benzoic acid, continue to stir for 7h, then react at 85°C for 5h, then raise the temperature of the system to 180°C, and react for 35h; after the reaction, when the system is cooled to 25°C The reaction solution was poured into 100 mL of n-propanol to precipitate a solid product, and the crude product F was obtained after filtration. The crude product F was washed 5 times with 40 mL of n-propanol to obtain product G. Product G was extracted with 50 mL n-propanol for 35 h in a Soxhlet extractor to obtain product H. Dry the product H in a vacuum oven for 18 hours with the temperature controlled at 140°C to obtain product J; dissolve 2 g of product J in 45 g of tetrahydro...
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