Engine suspension rubber material and preparation method thereof

Abstract

The invention provides an engine suspension rubber material and a preparation method thereof. The engine suspension rubber material comprises the following raw materials by weight: 100 parts of smoke sheet rubber, 3-5 parts of zinc oxide, 1.5-3 parts of stearic acid, 1.0-1.5 parts of an anti-aging agent 77PD, 0.8-2 parts of an anti-aging agent S-TMQ, 1.0-2.0 parts of an anti-aging agent MB, 2.0-5.0 parts of paraffin, 20-60 parts of carbon black, 5-10 parts of modified white carbon black R300, 3-10 parts of naphthenic oil T3367, 0.5-1 part of a dispersant 42M, 1.5-3 parts of a silane coupling agent, 2.0-2.5 parts of sulfur, 0.8-1.5 parts of an accelerator CBS, 0.2-0.5 part of an accelerator DM, 0.2-0.5 part of an anti-vulcanization reductant PK900. Through the efficient protective effect of the anti-aging agent 77PD and anti-aging agent S-TMQ, the protective synergistic effect of the anti-aging agent MB, the softening plasticization performance of the high viscosity and high flash point naphthenic oil T3367, as well as simultaneous use of a common vulcanization system and the anti-vulcanization reductant PK900, the dynamic fatigue durability and heat resistance of the engine suspension rubber material are improved, and the engine suspension colloid prepared from the engine suspension rubber material has good high temperature durability.

Description

technical field [0001] The invention relates to the technical field of engine mount manufacturing, in particular to an engine mount rubber material. The invention also relates to a method for preparing the engine mount compound. Background technique [0002] Engine mount refers to the elastic connection structure between the powertrain (including engine, clutch and transmission, etc.) NVH performance of the vehicle. A good engine mount should be able to fully reduce the vibration and noise caused by the engine, and prolong the service life of components. The basic function of the engine mount is to fix and support the powertrain, bear the reciprocating inertial force and moment generated by the engine's rotating and translational mass inside the powertrain, and bear all the dynamic forces acting on the powertrain during the driving process of the car. At the same time, the engine mount can also isolate the frame or body vibration caused by the engine excitation, and isola...

AI Technical Summary

Problems solved by technology

[0004] However, natural rubber, as a highly unsaturated diene rubber, has poor heat resistance and ozone resistance, which seriously affects the life of rubber products.

For ordinary rubber mounts, the durability of the rubber is poor, and the colloidal part will crack during use, which will lead to an increase in the change in the stiffness of the mount, and it will not be able to effectively isolate the vibration during driving, resulting in serious vibration of the whole vehicle

For liquid-sealed mounts, when the colloid fails and breaks, it will collapse with the metal parts, and the liquid in the mount will flow out, which will cause the engine to lose balance, which will make the powertrain support unstable, and the steering wheel and car body will vibrate severely at idle speed. It will directly affect the shock absorption effect of the suspension and the comfort of the car

[0005] In order to improve the heat resistance of natural rubber, the conventional solution is to use heat-resistant rubber, such as EPDM, or use a peroxide vulcanization system. However, due to the large difference in unsaturation between EPDM and natural rubber, it is difficult to achieve co-vulcanization. The durability of rubber products cannot meet the requirements

In the peroxide vulcanization system, the cross-linking bonds in the vulcanized rubber are carbon-carbon bonds, the bond energy is higher than the sulfur bonds, and the heat resistance is good. However, due to the single molecular chain during the dynamic durability test, the stress cannot be uniformly dispersed, resulting in The molecular chain is easy to break, and the dynamic fatigue is not good, especially the initial fatigue damage time is short, so that the durability of rubber products cannot meet the requirements

[0006] The existing shock-absorbing rubber usually uses anti-aging agent 4020 and RD to improve dynamic fatigue and ozone resistance, but generally the effective content of RD is low, and it is difficult to meet the resistance at high temperature, that is, 90-120 ° C, and the increase of RD The content will affect the vulcanization speed and degree of the mixed rubber, and will bring adverse effects to the material

In addition, in order to meet the different rigidity requirements of the mount, the rubber material should also have different hardness. The basic hardness of natural rubber is generally 40 degrees. Plasticizers, but plasticizers are small molecular substances, which are easy to precipitate and volatilize under high temperature conditions, which will increase the stiffness of rubber products and have a negative impact on the NVH performance of the vehicle

Images