High-temperature resisting methyl vinyl silicone rubber

Abstract

The invention discloses high-temperature resisting methyl vinyl silicone rubber as well as a prescription and a preparation process thereof. The high-temperature resisting modified silicon rubber material which has more than 300 DEG C of application temperature and can not crack when according with requirements of 550 DEG C, 4mm distance and high-temperature radiation for more than 12 minutes is prepared by adopting the following steps of: adding cerium oxide and polymide into the prescription in which methyl vinyl silicon crude rubber is taken as a rubber raw material to improve the heat-resisting temperature, adding hydroxy silicone oil, dimethyl silicon oil and a silane coupling agent to improve the oil-resisting performance, adding precipitation method white carbon black and gas-phase method white carbon black to improve the tearing-resistance strength, adding quartz power and kieselguhr to improve the tensile strength and matching technical schemes of the preparation process. The high-temperature resisting methyl vinyl silicone rubber overcomes the problems and the defects of poor high-temperature and aging resistance performance and short service life of the common silicone rubber in the prior art, satisfies the special requirements for the heat-resisting performance, the electrical strength and the mechanical strength of automotive rubber products, and ensures that the silicone rubber products achieve the aims of improving the high-temperature resistance performance and prolonging the service life.

Description

technical field [0001] The invention relates to a modified silicone rubber material and a preparation method thereof, specifically refers to the use for making automobile ignition cable sheaths, rubber hoses, sealing rings, etc., with high insulation, high electromagnetic damping, high temperature resistance, anti-corona, high A kind of high temperature resistant methyl vinyl silicone rubber with tear strength, flex resistance, oil swelling resistance and aging crack resistance. Background technique [0002] The ordinary methyl vinyl silicone rubber in the prior art has good flex resistance, tensile strength, elongation, oil resistance, and heat resistance. However, as the vehicle speed increases, the engine temperature increases. At 550 ° C, the distance of 4 mm, under the requirement of high temperature radiation for more than 12 minutes, the surface aging and cracking of ordinary methyl vinyl silicone rubber used for automobile ignition cable sheaths and rubber hoses is s...

AI Technical Summary

Problems solved by technology

[0002] The ordinary methyl vinyl silicone rubber in the prior art has good flex resistance, tensile strength, elongation, oil resistance, and heat resistance. However, as the vehicle speed increases, the engine temperature increases. At 550 ° C, the distance of 4 mm, under the requirement of high temperature radiation for more than 12 minutes, the surface aging and cracking of ordinary methyl vinyl silicone rubber used for automobile ignition cable sheaths and rubber hoses is serious, which greatly shortens the service life of silicone rubber. Therefore, the existing technology Ordinary silicone rubber has the problems of poor high temperature aging resistance and short service life.