Waterborne polyurethane flame-retardant composite material and preparation process thereof

The invention discloses a waterborne polyurethane flame-retardant composite material and a preparation process, and the formula comprises the following components in percentage by mass: 1-2% of nano zinc oxide, 0.5-1% of nano silicon solvent and the balance of polyurethane prepolymer solution. The preparation process of the waterborne polyurethane flame-retardant composite material comprises the following steps: step 1, weighing raw materials; step 2, preparing; step 3, preparation; step 4, mixing and molding; according to the invention, by adding the nano-zinc oxide, rapid crystallization and precipitation of a polyurethane coating film are promoted, molecular force is enhanced, and the polyurethane coating film can tolerate high temperature; according to the flame-retardant polyurethane composite material disclosed by the invention, the adhesion property of the polyurethane material is enhanced, free radicals of the polyurethane material are reduced, the flame retardance of the composite material is further