Bi-component polysulfide fireproofing flame retardant sealant and preparation method thereof

The invention relates to a bi-component polysulfide fireproofing flame retardant sealant and a preparation method thereof, wherein the bi-component polysulfide fireproofing flame retardant sealant is prepared from the following components according to parts by weight: component A: 50-100 parts of liquid polysulfide rubber, 30-70 parts of flame retardant plasticizer, 50-150 parts of flame retardantfiller, 60-200 parts of calcium carbonate, 0.3-1.2 parts of main agent micro-molecular finishing agent and 0.5-1.5 parts of silane coupling agent; component B: 10-30 parts of manganese dioxide, 20-60parts of plasticizer, 1-3 parts of semi-strengthening agent carbon black and 0.4-1.5 parts of accelerant. The preparation method comprises the following steps of: mixing, stirring, vacuumizing, inspecting and packaging all the ingredients of component A; and mixing, stirring, vacuumizing, grinding, inspecting and packaging all the ingredients of component B. The sealant can be used by uniformly mixing A and B according to