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Preparation method of graft-reinforced nitrile butadiene rubber

A technology of nitrile rubber and nitrile rubber, which is applied in chemical instruments and methods, compounds of group 4/14 elements of the periodic table, organic chemistry, etc. It can solve the difficulty in controlling the polymerization process and the large difference in the reactivity rate of monomers , Polymerized monomer components are complex and other issues

Active Publication Date: 2016-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method polymerizes complex monomer components, the difference in monomer reactivity rate is large, and the polymerization process is difficult to control

Method used

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  • Preparation method of graft-reinforced nitrile butadiene rubber
  • Preparation method of graft-reinforced nitrile butadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Acrylonitrile and vinyltriethoxysilane monomers are mixed in a molar ratio of 1:1, and a monomer solution with a mass concentration of 10% is configured with toluene solvent, and 0.05% mol of the monomer is added to the solution Catalyst, isolated from air and water, react at room temperature for 2 hours, use a vacuum desolventizer to remove the toluene solvent, and obtain a nitrile rubber reinforcing agent.

[0033] Add nitrile latex (100 parts on a dry basis), 5 parts by mass of the above-mentioned rubber reinforcing agent and 0.01 parts by mass of potassium persulfate initiator to the polymerization kettle, control the reaction temperature to 60 ° C, react for 3 hours, and after the reaction The emulsion is coagulated, washed and dried to obtain high-strength nitrile rubber products. After testing, compared with the tensile strength of ordinary nitrile raw rubber (18.5 MPa), the tensile strength of the enhanced nitrile raw rubber of Example 1 is 25.5 MPa, which is 3...

Embodiment 2

[0038] Mix acrylonitrile and vinyldiethoxymethylsilane monomers at a molar ratio of 1:0.1, configure a monomer solution with a mass concentration of 30% with toluene solvent, and add 0.1% mol of monomers to the solution Catalyst, isolated from air and water, react at room temperature for 8 hours, use a vacuum desolventizer to remove the solvent, and obtain a nitrile rubber reinforcing agent.

[0039]Nitrile latex (100 parts on a dry basis), 45 parts by mass of the above-mentioned rubber reinforcing agent and 0.1 parts by mass of benzoyl peroxide initiator were added to the polymerization kettle, and the reaction temperature was controlled to be 40° C., and the reaction was carried out for 5 hours. The reacted emulsion is coagulated, washed and dried to obtain a high-strength nitrile rubber product. After testing, compared with the tensile strength of ordinary nitrile raw rubber (19.6 MPa), the tensile strength of the enhanced nitrile raw rubber of Example 2 is 25.9 MPa, which...

Embodiment 3

[0044] Mix acrylonitrile and vinyltrimethoxysilane monomers at a molar ratio of 1:5, configure a monomer solution with a mass concentration of 1% with toluene solvent, and add 0.10% mol of monomers to the solution Catalyst, isolated from air and water, react at room temperature for 0.5h, and use a vacuum desolventizer to remove the toluene solvent to obtain a nitrile rubber reinforcing agent.

[0045] The nitrile latex (100 parts on a dry basis), the above-mentioned rubber reinforcing agent of 15 parts by mass and the cumene peroxide initiator of 0.08 parts by mass were added to the polymerization kettle, and the reaction temperature was controlled to be 65 ° C, and the reaction was carried out for 10 hours. The reacted emulsion is coagulated, washed and dried to obtain a high-strength nitrile rubber product. After testing, compared with the tensile strength of ordinary nitrile raw rubber (20.2MPa), the tensile strength of the enhanced nitrile raw rubber of Example 3 is 25.4M...

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Abstract

The invention provides a method of preparing a nitrile butadiene rubber reinforcing agent through an olefin metathesis catalyst and preparing high-strength nitrile butadiene rubber by graft-polymerizing nitrile butadiene rubber latex with the nitrile butadiene rubber reinforcing agent. In the invention, firstly the nitrile butadiene rubber reinforcing agent having excellent reaction activity with the nitrile butadiene rubber latex is synthesized through the steps of mixing a cyano compound containing an alkene or alkyne unsaturated substituent group with an organic silioxane monomer containing the alkene or alkyne unsaturated substituent group, and with a methylbenzene solvent, adding an olefin metathesis catalyst, insulating air and water, and performing a normal-temperature reaction, and separating the solvent through a vacuum desolventizer to prepare the nitrile butadiene rubber reinforcing agent. The nitrile butadiene rubber reinforcing agent and the nitrile butadiene rubber latex are fed into a polymerization kettle according to ratio with addition of an initiator, and performing a reaction with reaction temperature controlled for a certain time, and coagulating, washing and drying a product to obtain the high-strength nitrile butadiene rubber.

Description

technical field [0001] The invention relates to a preparation method of nitrile rubber, in particular to a high-strength nitrile rubber obtained by using an olefin metathesis catalyst to prepare a nitrile rubber reinforcing agent, and grafting and polymerizing nitrile latex and nitrile rubber reinforcing agent method of preparation. Background technique [0002] The strength of emulsion polymerized nitrile rubber raw rubber is low, generally only 5.5±0.5MPa, and its strength is mainly improved by the reinforcing agent in the post-processing process, generally up to 21.5-24.5MPa. In recent years, the in-situ reinforcement technology of rubber and the surface modification technology of nano powder have been widely used. 200910092836.8 The method of silicon in-situ hybridization graft modification containing polyconjugated diene latex, introducing organosiloxane into the unsaturated rubber system containing double bonds, and grafting organosiloxane through the reaction between...

Claims

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Application Information

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IPC IPC(8): C08F279/02C08F230/08C07F7/18
Inventor 艾纯金刘超伟张海霞曹凤霞高阳光董静朱晶付含琦梁滔何颖王卫东郑聚成陈建刚李树毅全民强
Owner PETROCHINA CO LTD
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