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Wear-resistant nitrile rubber composition and application thereof

A rubber composition and wear-resistant nitrile-butadiene technology, applied in the field of rubber materials, can solve the problems of short service life and limited wear resistance of nitrile-butadiene rubber.

Inactive Publication Date: 2020-05-01
CHANGSHA ZHONGJING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the above-mentioned contradictions, the wear resistance of existing nitrile rubber is limited, and the service life is relatively short, generally below 10,000 cubic meters

Method used

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  • Wear-resistant nitrile rubber composition and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0032] The preparation method of organically modified nano-silica is as follows: nano-silica (average particle diameter 100nm) is dispersed in ethanol solution, ultrasonically dispersed to make a 0.5% dispersion, KH570 is dissolved in ethanol, and the pH is adjusted to 3-4, adding the dispersion liquid and mixing, so that the amount of KH570 is 0.5% of the weight of nano-silica, reflux reaction at 65° C. for 15 hours, suction filtration, drying, and grinding to obtain organically modified nano-silica.

[0033] Each component was weighed according to the formula in Table 1, mixed in banburying, and made into rubber compound.

[0034] Table 1 (parts by weight)

[0035] Example 1 Example 2 Example 3 Carboxylated nitrile rubber 100 100 100 Organic modified nano silica 5 8 3 DCP 1 1 1 Zinc oxide 5.5 7 4 stearic acid 2.1 2.5 1.5 accelerator DM 0.7 1 1.2 Accelerator CZ 1.3 1 0.9 Antiaging agent RD 0.5 1.2 ...

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PUM

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Abstract

The invention discloses a wear-resistant nitrile rubber composition and application thereof. The composition comprises the following components in parts by weight: 100 parts of carboxylated nitrile rubber, 0.5-5 parts of a vulcanizing agent, 5-10 parts of zinc oxide, 3-8 parts of organic modified nano silicon dioxide, 1-3 parts of stearic acid, 1-6 parts of an accelerant, 0.5-2 parts of an anti-aging agent, 30-80 parts of carbon black and 5-15 parts of solid coumarone resin. All the components are matched, abrasion resistance, strength and ductility can be considered at the same time, are usedfor preparing the pump truck split piston, the average square amount is obviously increased, the service life of the piston is greatly prolonged, and remarkable application value is achieved.

Description

technical field [0001] The invention relates to the technical field of rubber materials, in particular to a wear-resistant nitrile rubber composition and its application. Background technique [0002] During the working process of the concrete pump, the reciprocating movement of the piston in the cylinder is used to continuously press the concrete to the pouring work surface through the pipeline. Since the piston is a component that is in contact with the concrete and directly pushes the concrete to do work and force, it must bear the pressure of the concrete. And impact, easily cause wear and tear. [0003] Nitrile rubber (NBR) is obtained by the polymerization of butadiene and acrylonitrile. It has good oil resistance, heat resistance and wear resistance, and is a typical material for making pumping pistons. According to the content of acrylonitrile, nitrile rubber can be divided into 5 types: ultra-high, high, medium-high, medium and low acrylonitrile. With the increase ...

Claims

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Application Information

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IPC IPC(8): C08L13/00C08L45/02C08K13/06C08K9/06C08K3/36C08K3/22C08K5/09C08K3/04C08K5/14C08K5/3437C08K5/47
CPCC08K2003/2296C08K2201/011C08K2201/014C08L13/00C08L45/02C08K13/06C08K9/06C08K3/36C08K3/22C08K5/09C08K3/04C08K5/14C08K5/3437C08K5/47
Inventor 陈孟宏
Owner CHANGSHA ZHONGJING MACHINERY
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