Flame retardant silicon rubber sleeve and preparation method thereof
The invention discloses a flame retardant silicon rubber sleeve and a preparation method thereof. The preparation method comprises the following steps: a, mixing silicon rubber, fumed silica, chlorinated paraffin, aluminium hydroxide, zinc borate, boehmite and sodium molybdate to prepare a masterbatch; b, mixing a vulcanizing agent and the masterbatch to perform primary vulcanization treatment; c, performing secondary vulcanization treatment on the masterbatch subjected to the primary vulcanization treatment in a baking oven to prepare flame retardant silicon rubber; d, performing extrusion molding on the flame retardant silicon rubber to prepare the flame retardant silicon rubber sleeve. The flame retardant silicon rubber sleeve prepared by the method has excellent flame retardancy.