Damping rubber and preparation method thereof, engine suspension and automobile

Abstract

The invention provides damping rubber and a preparation method thereof, an engine suspension and an automobile. The damping rubber is prepared from the following raw materials in parts by weight: 70 to 95 parts of Thai ribbed smoked sheet rubber RSS3, 5 to 30 parts of butadiene rubber BR9000, 3 to 5 parts of zinc oxide, 0.5 to 3 parts of stearic acid, 1.0 to 3.0 parts of anti-aging agent 6PPD, 0.8to 2 parts of anti-aging agent S-TMQ, 1.0 to 2.0 parts of anti-aging agent MB, 2.0 to 5.0 parts of paraffin, 10 to 60 parts of carbon black, 5 to 10 parts of modified white carbon black R300, 3 to 10parts of paraffin oil P2291, 0.5 to 1 part of dispersant 42M, 1.5 to 3 parts of silane coupling agent, 0 to 2.5 parts of sulfur, 0 to 1.5 parts of accelerator CBS, 0 to 0.5 part of accelerator DM, 0-0.6 part of accelerator TBTD-70, 0-2.0 parts of accelerator DTDM-80, 0-5.0 parts of DCP, and 0-3.0 parts of TAIC. The damping rubber has better low temperature resistance by the combination of the butadiene rubber, carbon black and modified white carbon black R300, and the protection and synergism of the various anti-aging agents and the use of the paraffin oil P2291 with high viscosity, high flash point and low pour point.

Description

Technical field [0001] The invention relates to the technical field of rubber preparation, in particular to a shock-absorbing rubber compound. The invention also relates to a method for preparing the shock-absorbing rubber compound, an engine suspension made of the shock-absorbing rubber compound, and an automobile equipped with the engine suspension. Background technique [0002] The main damping effects on automobiles are engine mounts, bushings and chassis bushings. Take engine mounts as an example. Engine mounts refer to the powertrain (including engine, clutch and transmission, etc.) and the frame or body Between the elastic connection structure, the quality of the engine mount is directly related to the vibration transmission between the engine and the car body, which affects the NVH performance of the vehicle. A good engine mount should be able to sufficiently reduce the vibration and noise caused by the engine and extend the service life of the components. The basic fun...

AI Technical Summary

Problems solved by technology

[0004] However, natural rubber is cis-1,4 polyisoprene crystalline rubber, which gradually crystallizes when it is lower than 5°C, and engine mounts made of rubber often work at low temperatures, and the relaxation process of rubber in low temperature environments It will become very slow, its modulus, hardness and intramolecular friction will increase, and its elasticity will decrease significantly, which will cause the stiffness of the engine mount to increase and the working ability to decrease, especially under dynamic conditions, which will seriously affect the vehicle NVH performance

[0005] In addition, as a commonly used plasticizer for engine mount rubber, aromatic hydrocarbon oil can improve the processing performance of rubber products and balance the hardness of vulcanized rubber. However, the pour point of aromatic hydrocarbon oil is 13°C, and its viscosity increase at temperatures below 13°C will also limit vulcanized rubber. Molecular chain segments move, resulting in a significant increase in the stiffness of the engine mount under dynamic conditions, which will also cause a decrease in the NVH performance of the vehicle

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