Preparation method for rubber for piston sealing ring with good anti-aging effect

Abstract

The invention provides a preparation method for rubber for a piston sealing ring with a good anti-aging effect, and relates to the technical field of the rubber processing. The rubber for the piston sealing ring is prepared by the following raw materials in parts by weight: 60-80 parts of natural rubber, 40-50 parts of isoprene rubber, 20-30 parts of polyacrylate rubber, 14-20 parts of polyvinylidene chloride, 2-5 parts of p-trifluoromethyl benzonitrile, 10-12 parts of glass fibers, 3-5 parts of titanium dioxide, 4-6 parts of nano zinc oxide, 2-3 parts of paraffin, 1-3 parts of sulfur, 4-6 parts of phthalimide, 1-3 parts of a coupling agent, 6-8 parts of a lubricant, and 4-5 parts of an inhibitor. The preparation method thereof mainly comprises steps of supercritical carbon dioxide treatment, open mixing, high-temperature vulcanizing and the like. The preparation method is capable of overcoming deficiency of the prior art, improving an anti-aging property and corrosion resistance of traditional rubber, and through adding multiple chemical substances, enabling the obtained rubber to have the advantages of tear resistance, high-temperature resistance, wear resistance and the like.

Description

technical field [0001] The invention relates to the technical field of rubber processing, in particular to a method for preparing rubber for piston sealing rings with good aging resistance. Background technique [0002] As a common component, rubber rings are used in many parts of automobiles, such as automobile brake calipers, etc. Automobile brake calipers are the main parts of disc brakes. In the braking state, the oil passes through the piston. The oil pressure on the brake pad builds up a certain pressure to push the friction plate to squeeze the brake disc, so as to achieve the purpose of braking. The piston sealing ring for automobile brake caliper is located between the piston and the cylinder of the brake caliper, which plays a role of sealing, controls the brake fluid from flowing out of the caliper, and ensures that the brake caliper builds up pressure when the car brakes. If the seal is not good, the function of controlling the hydraulic pressure will fail, and ...

AI Technical Summary

Problems solved by technology

However, often due to the high temperature in the car and the many impurities in the environment, the rubber ring is prone to aging during use, and then the rubber ring needs to be replaced frequently, which is not only time-consuming and laborious, but also greatly increases maintenance costs.

Rubber materials prepared with traditional formulas can no longer meet the increasingly high requirements for automotive piston seals

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