High-performance hydrogenated butadiene-acrylonitrile rubber compound and preparation method thereof

Abstract

The invention relates to a high-performance hydrogenated butadiene-acrylonitrile rubber compound and a preparation method thereof. The high-performance hydrogenated butadiene-acrylonitrile rubber compound comprises high-saturation hydrogenated butadiene-acrylonitrile rubber, carboxyl hydrogenated butadiene-acrylonitrile rubber and multifunctional epoxy resin. The hydrogenated butadiene-acrylonitrile rubber is cross-linked in the function of an organic peroxide, and at the same time, carboxyl hydrogenated butadiene-acrylonitrile rubber and multifunctional epoxy resin are self-crosslinked, so that a diversified polymer crosslinking system is formed and meets the requirement of features, such as oil resistance, heat resistance, hydrogen sulfide resistance, high hardness and good compression resistance, of rubber sealing products used in an oil field. Meanwhile, liquid multifunctional epoxy resin is taken as a rubber reactive temporary plasticizer, allows a rubber compound to be relativelylow in Mooney viscosity, and improves the compounding, molding and vulcanization processing property. During preparation, conventional mixing technology can be used, an open mill or an internal mixercan be used for mixing, and the rubber compound adapts to mould pressing or injection molding vulcanization process. Compared with a rubber compound in the prior art, the rubber compound is excellentin performance, simple in preparation method, low in cost, and suitable for industrial production.

Description

technical field [0001] The invention relates to a high-performance hydrogenated nitrile rubber compound and a preparation method thereof, in particular, the high-performance hydrogenated nitrile butadiene rubber compound can be mixed with an open mill or an internal mixer using traditional mixing techniques, and Suitable for compression molding or injection vulcanization molding process. Background technique [0002] Due to years of exploitation of underground crude oil, most oil wells have become low-permeability or ultra-low-permeability oil wells, and mining is becoming more and more difficult. Offshore oil production has also begun to shift from shallow sea areas to deep sea areas, and the depth of oil wells has developed to deep wells and ultra-deep wells. Ultra-deep wells are characterized by high temperature and pressure. Generally, the bottomhole temperature of a 5000m deep well will exceed 150°C, and the bottomhole pressure may reach more than 50MPa. The working ...

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Problems solved by technology

[0003] As an oilfield downhole rubber sealing product, especially the packer rubber sleeve is the core component of the packer used in the oilfield layered production operation, its performance requirements are extremely demanding. Therefore, many researchers are trying to improve and enhance the oilfield downhole The properties of hydrogenated nitrile rubber materials, such as: using in-situ unsaturated carboxylate to strengthen hydrogenated nitrile rubber [in-situ synthesis of zinc methacrylate to strengthen hydrogenated nitrile rubber, Synthetic Rubber Industry, 2005, 28(3): 205 -210], compound hydrogenated nitrile rubber with aramid short fiber / pulp or phenolic resin, and some people even think of compounding the latest nanomaterials such as carbon nanotubes or graphene with hydrogenated nitrile rubber [invention patent, hydrogenation Nitrile rubber and para-aramid fiber composite material and its preparation method, 200410062207.8; invention patent, an ultra-high pressure acid-resistant rubber sealing material for oil fields and its preparation method, 201310134896.5; invention patent, a hydrogenated nitrile rubber / carbon nanotube Composite materials and their preparation methods, 20120208196.4; Invention patent, a high-strength, high-pressure, high-pressure, hydrogen sulfide and corrosion-resistant hydrogenated nitrile rubber vulcanizate, 201410391897.5], although these research works have obvious effects on improving the mechanical properties of hydrogenated nitrile rubber However, the actual application of oil field downhole rubber sealing products may still need to be improved in industrial production, and the performance is not perfect, such as: resin reinforcement, unsaturated carboxylate reinforcement and aramid fiber reinforced rubber materials. Compression permanent deformation is not ideal

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