Epoxy resin based on uracil and preparation method and application thereof

[0034] Mix 112 grams of uracil and 1116 grams of epichlorohydrin, raise the temperature to 85°C, add 5 grams of tetramethylammonium chloride, react for 1.5 hours and then cool down to 30°C, then add 300 grams of 30wt% sodium hydroxide dropwise , After 1h dripping, continue to react for 3h. After the reaction system was lowered to room temperature, it was washed with 200 mL of deionized water each time for a total of 4 times, and then the solvent was removed with a rotary evaporator, and vacuum-dried at 50°C for 12 hours to obtain a light yellow transparent viscous liquid, which is a uracil-based ring Oxygen resin 210 grams, productive rate is 94.5%.

[0035] The above-mentioned epoxy resin based on uracil is carried out structural identification, and the infrared spectrogram is as follows figure 1 shown. The identification result is: there is 3050cm in the infrared spectrum -1 、2960cm -1 、2930cm -1 、2850cm -1 、1698cm -1 、1648cm -1 、1460cm -1 、1380cm -1 、1250cm -1 、820c

[0039] Mix 112 grams of uracil and 700 grams of epibromohydrin, raise the temperature to 110°C, add 20 grams of octadecyltrimethylammonium bromide, react for 0.5 hours and cool down to 30°C, then add dropwise 35% hydroxide Potassium solution 300 grams, dripped in 1 hour, continued to react at 30°C for 3 hours. After the reaction system was lowered to room temperature, it was washed with 200 mL of deionized water each time for a total of 4 times, and then the solvent was removed with a rotary evaporator, and vacuum-dried at 50°C for 12 hours to obtain 217 grams of uracil-based epoxy resin. The yield was was 97.5%.

[0040] The structure of the uracil-based epoxy resin obtained above was identified, and the identification result was basically the same as that in Example 1. The measured epoxy value is 0.91 epoxy equivalent / 100 grams of resin. 100 parts by weight of the uracil-based epoxy resin and 55 parts by weight of hexahydrophthalic anhydride were mixed, and 0.5 parts by weigh

[0042] Mix 112 grams of uracil and 800 grams of epichlorohydrin, raise the temperature to 90°C, add 12 grams of hexamethylenetetraammonium, react at 60°C for 1 hour, then cool down to 30°C, then dropwise add 35% hydrogen Potassium oxide solution 300 grams, dripped in 1 hour, continued reaction at 30°C for 3 hours. After the reaction system was cooled to room temperature, it was washed with 200 mL of deionized water each time for a total of 4 times, and then the solvent was removed by a rotary evaporator, and vacuum-dried at 50° C. for 12 hours to obtain 210 grams of uracil-based epoxy resin.

[0043] The uracil-based epoxy resin obtained above was identified, and the identification result was basically the same as that in Example 1. The measured epoxy value is 0.92 epoxy equivalent / 100 grams of resin. 100 parts by weight of the uracil-based epoxy resin and 41 parts by weight of hexahydrophthalic anhydride were mixed, and 0.5 parts by weight of imidazole was added. Then cured