Preparation method of hydrogenated nitrile butadiene rubber
A technology of hydrogenated nitrile rubber and operating steps, applied in the field of rubber, can solve the problems of difficult catalyst separation, harsh reaction conditions, low catalytic activity, etc., achieve good thermal stability and thermal aging, mild reaction conditions, and improve catalytic activity Effect
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example 1
[0023]First, mix sodium silicate and deionized water according to the mass ratio of 10:100, pour it into a three-neck flask equipped with a stirrer, dropping funnel and thermometer, then heat the flask to 35°C, start the stirrer, and set the temperature at 300r / Stir at a speed of 1 min, slowly add deionized water 50% mass concentration to 36% hydrochloric acid solution dropwise into the flask during the stirring process, control the dropping within 10min, and keep stirring for 30min to obtain orthosilicic acid; then By counting, take 2 parts of ferrous nitrate, 1 part of magnesium nitrate, 3 parts of urea and 2 parts of cerium acetylacetonate and put them into a container. into it, stir and mix evenly, increase the temperature to 35°C, and dropwise add ammonia water with a mass concentration of 25% to adjust the pH to 9 to obtain a mixture; then put the above-mentioned mixture into an oven and dry it at 75°C, Move it into a muffle furnace and calcinate at 500°C for 40 minutes...
example 2
[0026] First, mix sodium silicate and deionized water according to the mass ratio of 15:100, pour it into a three-necked flask equipped with a stirrer, dropping funnel and thermometer, then raise the temperature of the flask to 38°C, start the stirrer, and set the temperature at 330r / Stir at a speed of 1 min, slowly add deionized water 55% mass concentration to 36% hydrochloric acid solution dropwise into the flask during the stirring process, control the dropping within 13min, and keep stirring for 35min to obtain orthosilicic acid; then By counting, take 2.5 parts of ferrous nitrate, 1.5 parts of magnesium nitrate, 3.5 parts of urea and 4 parts of cerium acetylacetonate and put them into a container. into it, stir and mix evenly, increase the temperature to 37°C, and dropwise add ammonia water with a mass concentration of 25% to adjust the pH to 9.5 to obtain a mixture; then put the above-mentioned mixture into an oven and dry it at 75°C, Move it into a muffle furnace and c...
example 3
[0029] First, mix sodium silicate and deionized water according to the mass ratio of 20:100, pour it into a three-neck flask equipped with a stirrer, dropping funnel and thermometer, then raise the temperature of the flask to 40°C, start the stirrer, and set the temperature at 350r / Stir at a speed of 1 min, slowly add deionized water 60% mass concentration to 36% hydrochloric acid solution dropwise into the flask during the stirring process, control the dropping within 15 minutes, keep stirring for 40 minutes to obtain orthosilicic acid; then By counting, take 3 parts of ferrous nitrate, 2 parts of magnesium nitrate, 4 parts of urea and 5 parts of cerium acetylacetonate and put them into a container. into it, stir and mix evenly, raise the temperature to 38°C, and dropwise add ammonia water with a mass concentration of 25% to it, and adjust the pH to 10 to obtain a mixture; then put the above-mentioned mixture into an oven and dry it at 75°C, Move it into a muffle furnace and...
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