Preparation method of acrylonitrile-butadiene rubber
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A technology of nitrile-butadiene rubber and nitrile-butadiene rubber is applied in the field of preparation of nitrile-butadiene rubber, which can solve the problems of poor oil resistance and physical and mechanical properties, and achieve the effects of excellent physical and mechanical properties, good oil resistance and excellent physical and mechanical properties.
Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology
[0004] The disadvantage of the preparation method of nitrile rubber in the prior art is that oil resistance and physical and
Method used
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Embodiment 1
[0061] The preparation method of acrylonitrile-butadiene rubber of the present invention is obtained through cold batch emulsion polymerization by raw material butadiene and acrylonitrile, and it is characterized in that prepared acrylonitrile-butadiene rubber reaches the following technical indicators:
[0062]
[0063] Adopt the following raw material proportioning according to mass parts:
[0064]
[0065] Its preparation method comprises the following steps:
[0066] Sequentially add water, emulsifier, co-emulsifier, emulsion stabilizer and part of monomer acrylonitrile in the formula to 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 copolymerization Monomer butadiene: Start the stirring of the polymerization tank, and pass cold water into the interlayer of the polymerization tank and the cooling coil to cool down. Second...
Embodiment 2～ Embodiment 8
[0068] According to the method and step of embodiment 1, formula and performance are listed in table 1
[0069] Table 1
[0070]
[0071]
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Abstract
The invention relates to a preparation method of an acrylonitrile-butadiene rubber, belonging to a manufacturing method of a high-molecular compound by copolymerizing butadiene and acrylonitrile. The acrylonitrile-butadiene rubber is prepared by carrying out cold-process intermitted emulsion polymerization on the raw materials butadiene and acrylonitrile. The method is characterized in that the acrylonitrile-butadiene rubber has the following technical indexes: the Mooney viscosity is 30-95, the acrylonitrile monomer content accounts for 18-46 wt%, the degree of swelling is 20-50%, and the tensile strength is 10-22 Mpa. The invention provides an acrylonitrile-butadiene rubber with different acrylonitrile contents and excellent oil resistance and physical and mechanical properties and a preparation method thereof. The reaction temperature and the butadiene-acrylonitrile monomer ratio are regulated and controlled by using the unique emulsion system, redox system, monomer feeding mode and technological conditions; and the acrylonitrile and butadiene are subjected to emulsion copolymerization to obtain the acrylonitrile-butadiene rubbers with different acrylonitrile contents. The acrylonitrile-butadiene rubber prepared by the method has favorable oil resistance; and the method is suitable for preparing acrylonitrile-butadiene rubber raw materials required by various oil-resistant rubber products.
Description
technical field [0001] The invention relates to a preparation method of nitrile rubber. It belongs to the production method of the polymer compound obtained by the copolymerization reaction of butadiene and acrylonitrile. Background technique [0002] Nitrile rubber (NBR) is obtained by emulsion polymerization of two monomers, butadiene and acrylonitrile. Because its molecular chain contains unsaturated double bonds and polar groups -CN, it has good oil resistance and physical Excellent mechanical properties and other characteristics, has been widely used in various oil-resistant products, such as O-rings, snake (soft) leather tubes, gaskets, fuel tank lining rubber, oil tank linings, printing consumables, printing cylinders, insulating floor mats Plates, hard rubber parts, oil-resistant shoe soles, fabric coatings, pump impellers, oil well brushes, pipe thread protection layers, wire sheaths, adhesives, rubber gloves, and films for food packaging, etc., have broad prospect...
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Application Information
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