High-strength rubber for damping pulley of car

Abstract

The invention discloses a high-strength rubber for damping pulley of car, comprising the following components based on weight percentages: 10-50% of EPDM2504, 0.5-2.5% of zinc oxide, 0.1-0.5% of stearic acid, 0.1-0.5% of antiager 445, 0.1-0.5% of antiager MB, 2-10% of carbon black N990, 4-20% of carbon black SP-5000, 0.2-1% of TEAC, 0.3-1.5% of DBPMH and 0.3-1.5% of DCP. The invention under the 180 degrees centigrade x 24 H condition does not fall when being exerted with a 40 KN axial force. The tensile strength is 19 Mpa, and elongation is 510%. When a car drives over 250, 000 km, the invention does not obviously appear phenomena like cracking and aging. The invention is characterized by strong high-temperature resistance, strong antifriction strength, strong stability for resisting high and low temperature changes, strong tensile strength, moderate hardness, low production cost and so on.

Description

technical field [0001] The invention relates to a high-strength rubber used for automobile shock-absorbing pulleys. Background technique [0002] Ternary ethylene propylene rubber (EPDM rubber) is obtained by polymerizing three monomers of ethylene, propylene and diene in the presence of a catalyst. The diene as the third monomer mainly includes ethylidene norbornene and dicyclopentadiene ene and 1,4-hexadiene, etc. EPDM rubber has good chemical stability, and its ozone resistance, aging resistance, chemical resistance, weather resistance and high temperature resistance are all excellent, so it is widely used in windproof and rainproof tapes, waterproof building materials, and cable materials. , Automotive sealing strips, radiator hoses, shock absorbers and rubber rings for motor vehicle tires, etc. [0003] The crankshaft damping pulley is a functional part installed at the front end of the engine. It is widely used in the power plant of automobiles and ships. Its main fu...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiency of the existing automobile shock-absorbing pulley rubber, provide a new type of high-strength rubber for automobile shock-absorbing pulleys, overcome the traditional pulley rubber with weak high temperature resistance, weak friction resistance, and poor stability in high and low temperature changes , Weak tensile strength and poor hardness