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Preparation method of powdered acrylonitrile-butadiene rubber with high performance

A powdered nitrile rubber, high-performance technology, applied in the field of preparation of high-performance powdered nitrile rubber, can solve the problems of high powder rubber ash content, carbon nanotube surface deactivation, etc., achieve easy powder formation and shorten polymerization time , the effect of simple method

Active Publication Date: 2015-05-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method makes the surface of some carbon nanotubes deactivated, and the content of ash in the prepared powder rubber is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 500 parts of water, start stirring for 30 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of rapid polymerization latex: Add 100 parts of water, 30 parts of acrylonitrile, and 5 parts of emulsifier into the polymerization kettle, and pass nitrogen gas to test the pressure. After confirming that there is no leakage in the polymerization kettle, replace it with nitrogen several times, and then add butadiene 70 parts, 0.1 parts of cross-linking agent, start the polymerization tank to stir, then pass cold water into the polymerization tank to cool down, when the temperature of the polymerization tank drops to 10°C, add 0.2 parts of initiator and 0.4 parts of molecular weight regulator, and the polymerization reaction temperature is controlled At 10°C, the polymerization reaction time was controlled at 10 hours, and when the monomer conversion rate w...

Embodiment 2

[0039] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 1500 parts of water, start stirring for 40 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of rapid polymerization latex: add 200 parts of water, 35 parts of acrylonitrile, and 10 parts of emulsifier into the polymerization kettle, and pass nitrogen gas to test the pressure. After confirming that there is no leakage in the polymerization kettle, replace it with nitrogen several times, and then add butadiene 65 parts, 0.2 parts of cross-linking agent, start the polymerization tank to stir, then pass cold water into the polymerization tank to cool down, when the temperature of the polymerization tank drops to 20°C, add 0.3 parts of initiator and 0.5 parts of molecular weight regulator, and the polymerization reaction temperature is controlled At 20°C, the polymerization reaction time was controlled at 5 hours, and when the monomer conversion rate ...

Embodiment 3

[0043] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 2000 parts of water, start stirring for 20 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of rapid polymerization latex: Add 300 parts of water, 45 parts of acrylonitrile, and 15 parts of emulsifier into the polymerization kettle, and pass nitrogen gas to test the pressure. After confirming that there is no leakage in the polymerization kettle, replace it with nitrogen several times, and then add butadiene 55 parts, 0.5 parts of cross-linking agent, start the polymerization tank to stir, then pass cold water into the polymerization tank to cool down, when the temperature of the polymerization tank drops to 25°C, add 0.5 parts of initiator and 0.8 parts of molecular weight regulator, and the polymerization reaction temperature is controlled At 25° C., the polymerization reaction time was controlled at 8 hours, and when the monomer conversion rat...

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Abstract

A preparation method of a powdered acrylonitrile-butadiene rubber with high performance comprises steps of: dispersing of carbon nanotubes: adding carbon nanotubes and water in a high-speed disperser, and stirring to evenly disperse the carbon nanotubes; preparation of a rapid polymerization latex: adding water, acrylonitrile and an emulsifier into a polymerization kettle, after confirmation of no leakage, adding butadiene, a crosslinking agent, an initiator and a molecular weight regulator for polymerization; and when the conversion rate reaches a certain level, adding a terminator to obtain a fast polymerization acrylonitrile-butadiene latex; and condensation into a powder: adding the acrylonitrile-butadiene latex, water, carbon nanotubes, a separant, a flocculant and a coagulant into a coagulation tank; curing, washing, dehydrating and drying to obtain the powdered acrylonitrile-butadiene rubber. The prepared acrylonitrile-butadiene rubber slurry has the following properties: pH of 7-10, Mooney viscosity of ML (1+4) 100 DEG C 60-110, structure gel of 75%-85%, and acrylonitrile-butadiene rubber mechanical stability of less than 1.0%; and the powdered acrylonitrile-butadiene rubber has the following properties: powder particle size of 0.6-1.0 mm, acrylonitrile content of 40%-55%, ash content no more than 1.0, volatile matter no more than 1.0, and powdered ratio no less than 95%.

Description

technical field [0001] The invention relates to a preparation method of synthetic rubber, in particular to a preparation method of high-performance powdered nitrile rubber. Background technique [0002] Carbon nanotubes are seamless nanoscale tubular shell structures formed by curling single-layer or multi-layer graphite sheets. Since its discovery, carbon nanotubes have rapidly become a research hotspot for scientists all over the world due to their unique structure and excellent performance. People have been trying to prepare high-performance nanocomposites by using carbon nanotubes as a modified reinforcing phase of composite materials. As a polymer material with unique properties, rubber is widely used in various fields such as automobiles, chemicals, electronics, machinery manufacturing, and aerospace. [0003] CN200910144728.0 A production method of medium-high nitrile content cross-linked powdered nitrile rubber. Firstly, the nitrile mastic is synthesized, then the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/12
Inventor 梁滔魏绪玲刘宝勇魏玉丽龚光碧郑聚成王锋郑红兵陈建刚桂强
Owner PETROCHINA CO LTD
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