Air permeability heat-dissipating coating material and preparation method thereof

The present invention discloses an air permeability heat-dissipating coating material, which comprises the following raw materials by weight: 2-3 parts of hollow glass micro-beads, 12-15 parts of a styrene-maleic anhydride copolymer, 6-10 parts of propargyl alcohol, 90-100 parts of tetrahydrofuran, 4-7 parts of graphene, 16-20 parts of nanometer silica, 0.2-0.3 part of a silane coupling agent KH560, 700-800 parts of dimethylformamide, 4-5 parts of sodium nitride, 0.04-0.05 part of aluminum trichloride, 1.6-2 parts of a 2-3% sodium ascorbate solution, 1.8-2 parts of a 2-3% copper sulfate solution, 120-130 parts of high-density polyethylene, 0.6-1 part of citric acid, 4-5 parts of dibutyl maleate, 0.7-1 part of zinc methacrylate, 2-3 parts of N-ethyl-o/p-toluenesulfonamide, and 1-2 parts of calcium chloride. The coating material of the present invention has characteristics of micro pores, good thermal conductivity, good air permeability, substrate surface temperature reducing, and good protection effect.