Preparation method of nitrile butadiene rubber for preparing seal ring of floating oil seal with high wear resistance

Abstract

The invention relates to a preparation method of nitrile butadiene rubber for preparing a seal ring of a floating oil seal with high wear resistance. The preparation method comprises a formula and a preparation process, wherein the formula comprises the following components: nitrile butadiene rubber, N-550 carbon black, high-wear resistant carbon black, semi-reinforced carbon black, calcium carbonate, polyvinyl chloride, stearic acid, dibutyl ester, sulfur, accelerant, accelerant TE, accelerant TMTD, anti-aging agent RD, anti-aging agent 4010 and zinc oxide; the preparation process comprises the following steps: adjusting the temperature of a mixing machine to 100 DEG C, keeping the rotational speed at 32 revolutions / min, putting rubber raw material, a filling agent, a softening agent, an acidifying agent, the anti-aging agents and an activator into the mixing machine to mix for 20min, controlling the rubber temperature below 130 DEG C to discharge the rubber, then transferring to an open mill, and cooling extruded sheets to obtain a master batch; and putting the master batch into the mixing machine, adding a vulcanizing agent, blending, mixing, controlling the rubber temperature below 100 DEG C to discharge the rubber to the open mill, then cooling the extruded sheets, standing and curing to obtain the nitrile butadiene rubber for preparing the seal ring of the floating oil seal with high wear resistance.

Description

technical field [0001] The invention relates to a preparation method of nitrile rubber, in particular to a preparation method of nitrile rubber used for preparing high wear-resistant floating oil seal rings. Background technique [0002] The sealing principle of the floating oil seal is: the two floating rings are deformed by the axial compression of the O-ring to generate a pressing force on the end face of the floating ring seal. With the uniform wear of the sealing end face, the elastic energy stored by the O-ring is gradually released, thus playing the role of axial compensation. Therefore, in actual work, the O-ring is required to have strong tensile properties, impact toughness and wear resistance. [0003] The test data of the floating oil seal sealing ring in the prior art is as follows (wherein the test conditions are tensile speed: 500mm / min, LL0: 25mm): [0004] [0005] It can be seen from the above table that the tested sample has broken before reaching 300...

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Problems solved by technology

[0005] It can be seen from the above table that the tested sample has broken before reaching 300% fixed elongation, and the product cannot meet the requirements of the O-ring.

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