A kind of rubber composition, rubber product, hydraulic hose and preparation method thereof

Abstract

The invention relates to a rubber compound, a rubber product, a hydraulic rubber hose and a preparation method of the hydraulic rubber hose. The rubber compound comprises (i) hydrogenated butadiene-acrylonitrile rubber, (ii) thermal cracking carbon black and (iii) other selectable matching agents. A rubber material prepared by the rubber compound has excellent oil resistance and temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of rubber products, and in particular relates to a rubber composition, a rubber product, a hydraulic hose and a preparation method thereof. Background technique [0002] Hydraulic rubber hose (Hydraulic rubber hose) alias hydraulic oil pipe, hydraulic hose, high pressure hose, hydraulic hose. The hydraulic hose structure is mainly composed of a liquid-resistant synthetic rubber inner rubber layer, a middle rubber layer, a multi-layer reinforcement layer, and a weather-resistant synthetic rubber outer rubber layer. The inner rubber layer has the function of making the conveying medium withstand pressure and protecting the steel wire or wire fiber from erosion. The outer rubber layer protects the reinforced layer from damage. The reinforced layer (also known as the skeleton layer) is a skeleton material, and its function is to ensure the use pressure of the rubber hose. . [0003] Hydraulic hoses are divided...

AI Technical Summary

Problems solved by technology

[0005] The inner liner of the traditional steel wire wound hydraulic hose is mainly nitrile rubber, and its problems are as follows: the long-term oil resistance of nitrile rubber is at 100 ℃, and the intermittent application is at 120 ℃, which cannot meet the current situation of long-term use of construction machinery at 135-150 ℃ Require

Working in the environment of 135-150 ℃ for a long time, the service life of the steel wire wound hydraulic hose will be reduced quickly, which limits the development of the construction machinery industry

[0006] Since nitrile rubber is used as the main material of the lining rubber, it cannot meet the continuous improvement of the oil resistance and temperature resistance of the current construction machinery products for the steel wire wound hydraulic hose, which seriously affects the development of the construction machinery industry.

[0007] The traditional technology uses 28-33% acrylonitrile of nitrile rubber, which is beneficial to the assembly of steel wire wound hydraulic hose, and has good pulse resistance, but low oil resistance and temperature resistance; while the acrylonitrile of nitrile rubber is 40-45%. %, can improve the oil resistance and temperature resistance of the steel wire wound hydraulic hose, but due to the compression deformation, the quality of the assembly will be affected, and the crimping effect of the assembly will be reduced

[0008] The aging resistance and liquid resistance of the inner lining layer are not high. During the use of the rubber hose, it is subjected to the aging, swelling and extraction of high-temperature fluid, which will reduce the performance of the inner lining layer, thereby greatly reducing the service life of the hose.

[0009] If hydrogenated nitrile rubber is used as the main material for the inner lining of steel wire wound hydraulic hose, due to the high Mooney viscosity of hydrogenated nitrile rubber, it will generate a lot of heat during processing. When using traditional N550 and N660 carbon black, it will cause mixing The rubber is easy to scorch during extrusion, which seriously affects the adhesion between the rubber and the copper-plated steel wire

In addition, the physical properties of the rubber fluctuate greatly, which cannot meet the high pulse performance of the steel wire wound hydraulic hose

[0010] Due to the problems in the bonding and mixing processing of hydrogenated nitrile rubber and copper-plated steel wire, there is currently no improvement in the bonding and mixing process of hydrogenated nitrile rubber with copper-plated steel wire based on the performance advantages of hydrogenated nitrile rubber, which limits its use under high pressure. Use on hydraulic hose

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