▎ 摘　　要

NOVELTY - High thermal conductivity, low specific gravity lithium battery explosion-proof silicone rubber gasket comprises 100 pts. wt. methyl vinyl silicone rubber, 200-400 pts. wt. aluminum oxide, 10-20 pts. wt. boron nitride, 1-2 pts. wt. vulcanizing agent, 20 pts. wt. silica rubber flame retardant, 3-6 pts. wt. silane coupling agent, 3-6 pts. wt. hydroxy silicone oil and 5-20 pts. wt. graphene. USE - Used as high thermal conductivity, low specific gravity lithium battery explosion-proof silicone rubber gasket. ADVANTAGE - The silicone rubber gasket: has excellent insulation performance, increased vertical thermal conductivity of more than 1.6 W/mx k, improved horizontal heat-conducting coefficient of more than 5 W/mx k, specific gravity of less than 2, hardness of more than 40SHOREA, tensile strength of greater than 250PSI and resilience rate of more than 50%; and flame-retardant grade reaches UL94V0 requirement. The method: is simple, safe, easy to operate and suitable for large scale industrial production; has mild reaction conditions and low production cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing explosion-proof silicone rubber gasket, comprising (i) disposing boron nitride and graphene in aqueous ethanol solution containing water with ethanol in a molar ratio of 1:1-2:1, immersing respectively the boron nitride and graphene in silane coupling agent aqueous solution, subjecting to homogenous dispersion, suction filtering, drying, baking to obtain boron nitride powder and graphene powder, (ii) adding aluminum oxide into a high speed mixer, treating the aluminum oxide with silane coupling agent for 3-5 minutes, adding the boron nitride powder and graphene powder, high speed stirring and/or ultrasonic dispersing and/or high pressure homogenizing and/or ball milling and/or supercritical phase combined mixed processing to obtain mixed powder, (iii) adding methyl vinyl silicone rubber into kneader, primary kneading, adding slowly the mixed powder and flame retardant, kneading uniformly, cooling, again kneading, then adding vulcanizing agent, and mixing to obtain mixed composite rubber, and (iv) adding the mixed composite rubber into open mill machine, then milling to obtain final rubber, and (v) tableting the final rubber, placing in flat vulcanizing mold machine, and vulcanizing at high temperature.