Preparing method of flame-retardant mixed silicone rubber by utilization of platinum compound and vapor-phase-method white carbon black in combination

The invention relates to a preparing method of flame-retardant mixed silicone rubber by utilization of a platinum compound and vapor-phase-method white carbon black in combination, and relates to the technical field of rubber products. The preparing method includes: a) a step of adding vapor-phase-method white carbon black having a specific surface area of 50 m<2>/g into chloroplatinic acid, mixing, and allowing the mixture to stand at room temperature for 10 h to obtain a mixture of the platinum compound and the white carbon black; and b) a step of adding vapor-phase-method white carbon black having a specific surface area of 200 m<2>/g, a modifier and ferric oxide into methyl vinyl silicone raw rubber having a polymerization degree of 7000, uniformly mixing in a kneading machine, performing thermal processing at 150 DEG C for 2 h, adding a flame retardant auxiliary agent that is vapor-phase-method titanium dioxide and the mixture of the platinum compound and the white carbon black, and uniformly mixing at a double-roller rubber mixing machine to obtain a rubber material. The components are simple and preparation is convenient. By adding the platinum compound, the mixed silicone rubber is good in performance, free of odor, just right in color and good in flame retardant performance.