Preparation method of completely water-soluble epoxy resin
An epoxy resin, water-soluble technology, applied in the field of preparation of completely water-soluble epoxy resin, can solve the problems such as the preparation of water emulsion but not the preparation of epoxy resin aqueous solution.
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Embodiment 1
[0030] Put 0.01mol of 2,6'-pyridinedicarboxylic acid in a constant temperature tank at 75°C, and add 0.01wt.% of its mass of N,N'-dimethylformamide and 0.021mol of thionyl chloride to it, Subsequently, the constant temperature reaction was continued for 2 h under the condition of maintaining the temperature. After the reaction was completed, the excess thionyl chloride was distilled off under reduced pressure to obtain light pink needle-like crystals (2,6'-pyridinedicarboxylic acid chloride). The crude product of 2,6'-pyridinedicarboxylic acid chloride prepared above was put into a sublimator, and subjected to sublimation and purification at 75°C to obtain 2,6'-pyridinedicarboxylic acid chloride as white needles. Dissolve the purified 2,6'-pyridinedicarboxylic acid chloride in a small amount of chloroform and put it into the dropping funnel, and add it slowly to the shrinkage water that has been cooled to -20°C under the protection of nitrogen. In the mixed system of glycerin ...
Embodiment 2
[0034] Put 0.01mol of 2,6'-pyridinedicarboxylic acid in a constant temperature tank at 80°C, and add 0.02wt.% of its mass of N,N'-dimethylformamide and 0.04mol of thionyl chloride to it, Subsequently, the constant temperature reaction was continued for 3 h while maintaining the temperature condition. After the reaction was completed, excess thionyl chloride was distilled off under reduced pressure to obtain light pink needle-like crystals (2,6'-pyridinedicarboxylic acid chloride). The crude product of 2,6'-pyridinedicarboxylic acid chloride prepared above was put into a sublimator for sublimation and purification at 80°C to obtain 2,6'-pyridinedicarboxylic acid chloride as white needles. Subsequently, the purified 2,6'-pyridinedicarboxylic acid chloride was dissolved in a small amount of chloroform and put into a dropping funnel, and added slowly dropwise. Under nitrogen protection, it had been cooled to -15°C In the mixed system of glycidol and triethylamine, the addition amo...
Embodiment 3
[0037]Put 0.01mol of 2,6'-pyridinedicarboxylic acid in a constant temperature tank at 85°C, and add 0.03wt.% of its mass of N,N'-dimethylformamide and 0.06mol of thionyl chloride to it, Subsequently, the constant temperature reaction was continued for 4 h under the condition of maintaining the temperature. After the reaction was completed, the excess thionyl chloride was distilled off under reduced pressure to obtain pale pink needle-like crystals (2,6'-pyridinedicarboxylic acid chloride). The crude product of 2,6'-pyridinedicarboxylic acid chloride prepared above was put into a sublimator for sublimation and purification at 85°C to obtain white needle-like 2,6'-pyridinedicarboxylic acid chloride. Subsequently, the purified 2,6'-pyridinedicarboxylic acid chloride was dissolved in a small amount of chloroform and put into the dropping funnel, and added by slow dropwise under nitrogen protection and cooled to -10°C In the mixed system of glycidol and triethylamine, the addition ...
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