Oil inlet sealing ring for automobile brake master cylinder

Abstract

The invention discloses an oil inlet seal ring for an automotive brake master cylinder. The oil inlet seal ring comprises the following raw materials in parts by weight: 100-106 parts of ethylene propylene diene monomer rubber K4802, 6-7 parts of calcium silicate, 3-4 parts of polyethylene glycol 400, 3-4 parts of poly(1, 2-propylene glycol adipate), 10-15 parts of sepiolite powder, 6-10 parts of barite powder, 1-2 parts of zinc oxide, 3-4 parts of polyamide wax micro-powder, 1-2 parts of 2-thiol-benzimidazole, 1-2 parts of accelerator TMTD, 0.6-1 part of sulfur, 1-2 parts of N-2-(aminoethyl)-3-aminopropyl trimethoxysilane and 6-8 parts of modifying additives. The oil inlet seal ring disclosed by the invention has the advantages of high strength, tension resistance, tear resistance, corrosion resistance and strong temperature resistance and can overcome the situation that the existing oil inlet seal ring product is very easy to produce a gap during mold stripping, the production efficiency and the product qualification rate are high, the oil inlet seal ring can completely conform to the requirements of using working conditions of the oil inlet seal ring for the automotive brake master cylinder, and the oil inlet seal ring is safe and reliable.

Description

technical field [0001] The invention mainly relates to a sealing ring, in particular to an oil inlet sealing ring for an automobile brake master cylinder. Background technique [0002] The automobile brake master cylinder is the core part of the brake device to achieve the purpose of braking. Therefore, the oil inlet sealing ring of the brake master cylinder bears huge oil pressure. Once it has defects such as expansion, shrinkage or rupture, it will directly cause Brake failure, threatening the safety of drivers and passengers; [0003] EPDM rubber has outstanding aging resistance, electrical insulation performance and ozone resistance. Ethylene-propylene rubber can be filled with a large amount of oil and carbon black, and the product price is low. Ethylene-propylene rubber has good chemical stability, strong wear resistance, elasticity, and oil resistance. Contents of the invention [0004] The object of the present invention is to provide a sealing ring for an oil in...

AI Technical Summary

Problems solved by technology

[0002] The automobile brake master cylinder is the core part of the brake device to achieve the purpose of braking. Therefore, the oil inlet sealing ring of the brake master cylinder bears huge oil pressure. Once it has defects such as expansion, shrinkage or rupture, it will directly cause Brake failure, threatening the safety of drivers and passengers;

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