Rubber composition used for automobile tail door buffer block

Abstract

The invention relates to a rubber composition used for an automobile tail door buffer block. A certain amount of neoprene DCR-66, neoprene DCR213, zinc oxide, stearic acid, magnesium oxide, an antioxidant D, an antioxidant MB and 4010NA are mixed to form the rubber composition used for an automobile tail door buffer block. According to the invention, neoprene DCR-66 and neoprene DCR213 are selected to endow the product with higher impact strength, better elongation at break and wear resistance, and excellent weather resistance and oil resistance. Through adding of the antioxidant D and the antioxidant MB for use simultaneously, the product can have excellent heat resistance, ozone resistance and better weather resistance, and also has a strong protective effect on flex cracking. The antioxidant MB is white crystalline powder, is non-toxic and bitter, has relative density of 1.40-1.44 and a melting point of not less than 300DEG C, is soluble in acetone and ethyl acetate, hardly soluble in petroleum ether and dichloromethane, and insoluble in carbon tetrachloride, benzene and water.

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials, and in particular relates to a rubber composition used for a buffer block of an automobile tailgate. Background technique [0002] With the continuous development of China's automobile industry, automobile noise and vibration have become important evaluation indicators for driving and riding comfort. More and more people prefer SUVs and MPVs for reasons of use or quality of life. Different from the trunk lid of a car, it has higher requirements for each component on the tailgate. In order to better play a buffer role, installing a buffer block at the R corner of the tailgate can reduce the noise caused by the resonance between the tailgate and the vehicle. The usual tailgate buffer is made of EPDM rubber. Long-term low-temperature and high-temperature use will cause serious rubber aging, large impact deformation, and poor self-adhesiveness. It is easy to leave rubber marks on t...

AI Technical Summary

Problems solved by technology

The usual tailgate buffer is made of EPDM rubber. Long-term low-temperature and high-temperature use will cause serious rubber aging, large impact deformation, and poor self-adhesiveness. It is easy to leave rubber marks on the car. When the resonance point of the car body is reached, the buffer The effect is poor, so it is of great significance to develop a rubber composition for automobile tailgate bumper to reduce or avoid the noise generated by tailgate resonance when driving