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.