A kind of rubber core material and preparation method thereof

Abstract

The invention relates to a rubber core material. The rubber core material comprises, by weight, 80-120 parts of nitrile rubber, 15-20 parts of high-abrasion-resisting furnace blacks, 20-30 parts of semi-reinforcement furnace blacks, 10-30 parts of graphene composite materials, 20-40 parts of superfine vulcanized powder PVC, 0.8-1.5 parts of stearic acid, 1.2-2 parts of dioctyl phthalate, 1-1.8 parts of dibutyl phthalate, 1-4 parts of accelerants TT, 0.5-3 parts of accelerants CZ and 1-3 parts of anti-aging agents RD. The invention further relates to a manufacturing method of the rubber core material. The graphene composite materials have good affinity, the graphene of a honeycomb-shaped lattice structure is beneficial to dispersion of other components, meanwhile, the superfine vulcanized powder PVC also can promote even dispersion of the graphene composite materials and other components, in this way, a cooperative effect is achieved between the graphene composite materials and the superfine vulcanized powder PVC, the effects of all the components are brought into full play, and the useful performance of the rubber core material is comprehensively improved.

Description

technical field [0001] The invention relates to the technical field of rubber core materials for blowout preventers, in particular to a rubber core material and a preparation method thereof. Background technique [0002] The rubber core is the key part of the oil well universal annular blowout preventer. It is a device used to close the wellhead to avoid blowout during workover and completion. Its structure is relatively simple, but its function is extremely important. [0003] As a standard elastomer for oil-resistant rubber products, nitrile rubber is widely used in automobiles, textiles, aerospace, crude oil extraction, petrochemicals, wires, etc. due to its excellent physical and mechanical properties such as oil resistance, aging resistance, benzene resistance, and heat resistance. Cables, printing and dyeing and food packaging and other fields. With the increase of acrylonitrile content, the oil resistance, fuel oil resistance, benzene resistance, tensile strength, ha...

AI Technical Summary

Problems solved by technology

[0004] However, the rubber core of nitrile rubber in the prior art still has many deficiencies in practical applications: it is prone to cracking and layer-like shedding on the upper surface, large degumming of the inner wall of the rubber core, and cracking of the rubber at the contact point between the bottom of the rubber core and the piston. and other phenomena, the rubber core cannot seal the high-pressure fluid at the bottom of the well, and the rubber core cannot be recovered in time, and the wear resistance and heat resistance of the rubber core material need to be improved

However, its modification process to graphene is complicated, and it promotes the uniform dispersion of other substances in the rubber material because of the large specific surface area of ​​graphene. If the graphene itself is not uniformly dispersed in the rubber material, then directly Affecting the promoting effect of graphene on the uniform dispersion of other materials

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