Production process of polyurethane flame-retardant waterproof coating

The invention discloses a production process of a polyurethane flame-retardant waterproof coating comprising a component A and a component B. The component A is prepared by the process steps: a1, preparing a raw material A which comprises flame-retardant polyether polyol, liquefied diphenylmethane diisocyanate and chlorinated paraffin; a2, putting the raw materials; a3, stirring at constant temperature; a4, sampling and detecting the content; a5, cooling; a6, pressurizing and discharging; a7, metering and packaging; and a8, warehousing. The component B is prepared by the process steps: b1, preparing a raw material B, wherein the raw material B comprises a flame retardant, an antioxidant, a pigment, water, a filler, an ultraviolet light absorber and a drier; b2, putting the raw material B;b3, grinding; b4, sampling and detecting the fineness; b5, metering and packaging; and b6, warehousing. The process has the advantages of environmental protection, ultraviolet absorption, long servicelife, cold construction a