Sulfonated aromatic diamine and sulfonated polyimide resin and preparation methods thereof
A technology of sulfonated polyimide resin and sulfonated aromatic diamine, which is applied in the preparation of sulfonic acid, thioether, organic chemistry, etc., can solve the problem of reducing the thermal stability of thin films, restricting the application of polymers, and making public reports of research results and other problems, to achieve the effects of excellent thermal stability, good proton conductivity, and low methanol permeability
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Embodiment 1
[0054] Embodiment 1, the preparation of sulfonated aromatic diamine
[0055] In a three-neck flask equipped with magnetic stirring, condenser and nitrogen inlet and outlet, add 18.00 grams (0.15 moles) of lithium trifluoroacetate, 2.88 grams (0.12 moles) of magnesium powder and 200 milliliters (2.47 moles) of tetrahydrofuran, under nitrogen protection , stirred and added dropwise 29.13 g (0.12 mol) of 4-bromodiphenyl ether. After the reaction mixture was stirred at room temperature for 4 hours, it was refluxed at 60-70° C. for 4 hours to obtain an off-white turbid solution. After the reaction system was cooled to room temperature, excess magnesium powder and Grignard reagent were reacted with 10% hydrochloric acid aqueous solution. The organic phase was collected and distilled under reduced pressure to obtain 4-phenoxy-α,α,α-trifluoromethylacetophenone liquid.
[0056] 1 H-NMR (400MHz, DMSO-d 6 , ppm): 7.14-7.16 (d, 2H), 7.19-7.21 (d, 2H), 7.29-7.33 (t, 1H), 7.48-7.52 (t, ...
Embodiment 2
[0061] Embodiment 2, the preparation of sulfonated aromatic diamine
[0062] In a three-neck flask equipped with magnetic stirring, condenser and nitrogen inlet and outlet, add 18.00 grams (0.15 moles) of lithium trifluoroacetate, 3.60 grams (0.15 moles) of magnesium powder and 300 milliliters (3.70 moles) of tetrahydrofuran, under nitrogen protection , stirred and added dropwise 31.82 g (0.12 mol) of 4-bromodiphenyl sulfide. After the reaction mixture was stirred at room temperature for 4 hours, it was refluxed at 60-70° C. for 4 hours to obtain an off-white turbid solution. After the reaction system was cooled to room temperature, excess magnesium powder and Grignard reagent were reacted with 15% hydrochloric acid aqueous solution. The organic phase was collected and distilled under reduced pressure to obtain 4-phenylthio-α,α,α-trifluoromethylacetophenone liquid.
[0063] 1 H-NMR (400MHz, DMSO-d 6 , ppm): 7.17-7.19 (t, 1H), 7.23-7.25 (t, 2H), 7.39-7.41 (d, 2H), 7.50-7.52 (...
Embodiment 3
[0068] Embodiment 3, the preparation of sulfonated aromatic diamine
[0069] In the there-necked flask equipped with magnetic stirring, condenser and nitrogen inlet and outlet, add 23.99 grams (0.20 moles) of lithium trifluoroacetate, 4.32 grams (0.18 moles) of magnesium powder and 325 milliliters (4.00 moles) of tetrahydrofuran, under nitrogen protection , stirred and added dropwise 32.50 g (0.15 mol) of 4-chlorobenzophenone. After the reaction mixture was stirred at room temperature for 1 hour, it was refluxed at 60-70° C. for 4 hours to obtain an off-white turbid solution. After the reaction system was cooled to room temperature, excess magnesium powder and Grignard reagent were reacted with 15% hydrochloric acid aqueous solution. The organic phase was collected and distilled under reduced pressure to obtain 4-benzoyl-α,α,α-trifluoromethylacetophenone liquid.
[0070] 1 H-NMR (400MHz, DMSO-d 6 , ppm): 7.50-7.55 (t, 2H), 7.60-7.64 (t, 1H), 7.76-7.78 (d, 2H), 7.87-7.89 (d...
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