Heat-conducting and shock-absorbing rubber material and preparation method thereof

Abstract

The invention provides a heat-conducting and shock-absorbing rubber material, and is used for preparing the rubber shock absorption product with the thickness larger than 25 mm. The heat-conducting and shock-absorbing rubber material comprises the following components in parts by weight: 70-100 parts of natural rubber, 0-30 parts of synthetic diene rubber, 10-30 parts of carbon black, 3-10 parts of a plasticizer, 0.5-2 parts of an anti-aging agent RD, 0.5-3 parts of an anti-aging agent 4020, 3-5 parts of zinc oxide, 0.5-2 parts of stearic acid, 1-8 parts of carbon nanotubes, 50-80 parts of silane modified silica, 1.0-1.8 parts of sulfur and 0.5-3 parts of a dithiophosphate accelerator. The invention also provides a preparation method of the heat-conducting and shock-absorbing rubber material, the vulcanization efficiency of the heat-conducting and shock-absorbing rubber material can be improved, and the quality problems of excessive vulcanization outside a product and insufficient vulcanization inside the product during vulcanization can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of rubber preparation, in particular to a heat-conducting and shock-absorbing rubber compound, and at the same time, the invention also relates to a preparation method of the above-mentioned heat-conducting and shock-absorbing rubber compound. Background technique [0002] The engine mount system is an elastic connection system between the powertrain (including engine, clutch and transmission, etc.) NVH performance. A good suspension system should be able to fully reduce the vibration and noise caused by the engine and prolong the service life of parts. [0003] Engine mount products generally consist of metal brackets and rubber materials. The metal plays the role of supporting and connecting the engine and the body. The internal friction of the rubber material is much higher than that of the metal material, which can effectively attenuate the vibration, play the role of shock absorption and shock isolatio...

AI Technical Summary

Problems solved by technology

Since rubber is a poor conductor of heat, during the vulcanization process of thick rubber products, the temperature rise rate inside and outside the rubber material is inconsistent, which will cause different degrees of vulcanization of the inner and outer rubber materials, resulting in the problem of oversulfurization or undersulfurization, and oversulfurization and undersulfurization will affect the rubber. Product performance

In order to ensure that the internal rubber can also achieve positive vulcanization, it is usually used to prolong the vulcanization time, but this may also lead to over-vulcanization of the rubber product, and it will also significantly reduce production efficiency and greatly increase energy consumption in the production process

[0005] At this time, increasing the vulcanization temperature can shorten the vulcanization time to a certain extent, but because natural rubber is a non-heat-resistant rubber, the sulfur vulcanization system is also prone to vulcanization reversion during high temperature vulcanization, which will also cause product performance degradation