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

Inactive Publication Date: 2016-08-31
郭舒洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention: In the process of preparing hydrogenated nitrile rubber in the present traditional method, although the NBR homogeneous catalytic system is mature in technology, there are catalyst separation difficulties and the shortcomings of high cost, while the non-homogeneous catalytic system Catalyst separation and recovery is simple, but low catalytic activity leads to too harsh reaction conditions, in addition, the current situation of existing hydrogenated nitrile rubber with poor heat resistance provides a method of adding orthosilicic acid to ferrous nitrate, magnesium nitrate, urea and After cerium acetylacetonate, adjust the pH with ammonia water to obtain a mixture, then dry and calcinate the mixture, pass high-purity hydrogen gas, mix and soak with hydrochloric acid, add hydrogen peroxide and nitrile rubber, and then filter through ultraviolet light and hydrogenation reaction , and finally the filtrate is cooled and dried to obtain the preparation method of hydrogenated nitrile rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a preparation method of hydrogenated nitrile butadiene rubber and belongs to the technical field of rubber. The preparation method comprises: adding ortho-silicic acid into ferrous nitrate, magnesium nitrate, urea and cerium acetylacetonate, adjusting pH with ammonia water to obtain mixture, drying and calcining the mixture, introducing high-purity hydrogen, mixing with hydrochloric acid for soaking, adding hydrogen peroxide and nitrile butadiene rubber, filtering after ultraviolet irradiation and hydrogenation, and cooling and drying residue to obtain the hydrogenated nitrile butadiene rubber. Embodiments prove that the process of the invention is simple, production cost is lowered, reaction conditions during preparation are mild, the preparation process is safe and reliable, catalysts are simple to separate and recycle, catalytic activity is improved, the prepared hydrogenated nitrile butadiene rubber has good thermal stability and thermal aging performance and high applicable value and is widely applicable to the fields such as oilfield and automobile industry.

Description

technical field [0001] The invention discloses a method for preparing hydrogenated nitrile rubber, which belongs to the technical field of rubber. Background technique [0002] Hydrogenated nitrile rubber (HNBR) is a highly saturated elastomer obtained by special hydrogenation of nitrile rubber. Hydrogenated nitrile rubber has good oil resistance (good resistance to fuel oil, lubricating oil, and aromatic solvents); and due to its highly saturated structure, it has good heat resistance and excellent chemical corrosion resistance (to Freon, acid and alkali have good resistance), excellent ozone resistance, high compression set resistance; at the same time, hydrogenated nitrile rubber also has high strength, high tear performance, excellent wear resistance and other characteristics. It is one of the rubbers with excellent comprehensive properties. It is now widely used in industrial fields such as automobiles, oil field exploration, and aerospace. [0003] The high temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/02B01J13/02
CPCC08C19/02B01J13/02
Inventor 郭舒洋张明
Owner 郭舒洋
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