TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The solid additive mainly comprises: (a) polyethylene wax, modified polyethylene wax, polypropylene wax, or polytetrafluoroethylene wax; (b) hollow glass microball, hollow ceramic microball, ceramic microsphere, silicon dioxide microsphere, or polymer microsphere; and (c) inorganic pigment with low dielectric constant, and filling material. The dielectric constant of the solid additive is 1-4, preferably 1.05-2.5; the particle size is 0.5-200 mu m, preferably 1-40 mu m; and the density is 0.8-4 g/cm3, preferably 0.8-1.5 g/cm3. The added amount of the solid additive is 5-10% of the mass of the polyurethane resin. The polyurethane resin is prepared via reacting A component with B component; where the A component comprises aliphatic isocyanate, aliphatic isocyanate derivative, or aliphatic isocyanate pre-polymer; where the isocyanate derivative is isocyanate polymer, or addition compound of isocyanate and micromolecule polybasic alcohol; the micromolecule polybasic alcohol comprises two or three hydroxyl functional groups, and the molecule weight is lower than 300 g/mol; and the isocyanate pre-polymer is prepared via reacting aliphatic isocyanate with one or more of polyether polybasic alcohol, polyester polybasic alcohol and micromolecule polybasic alcohol; and the B component at least comprises hydroxyl acrylic acid resin, polyester polybasic alcohol, polyether polybasic alcohol, polyaspartic acid, or micromolecule polybasic alcohol chain expanding agent; where the hydroxyl acrylic acid resin is polyacrylate polybasic alcohol, polyether modified polyacrylate polybasic alcohol, or polyester modified polyacrylate polybasic alcohol; the number average molecule weight of the hydroxyl acrylic acid resin is 500-4000 g/mol; the polyester polybasic alcohol is adipic acid polyester polybasic alcohol, aromatic polyester polybasic alcohol, or polyester polybasic alcohol containing polyether; the number average molecule weight of the polyester polybasic alcohol is 500-4000 g/mol; the polyether polybasic alcohol is epoxy propane homopolymer, copolymer of epoxy propane and epoxy ethane, homopolymer of tetrahydrofuran, copolymer of tetrahydrofuran and epoxy propane, or copolymer of tetrahydrofuran and epoxy ethane; the number average molecule weight of the polyether polybasic alcohol is 500-4000 g/mol; and the micromolecule polybasic alcohol chain expanding agent contains two or three hydroxyl functional groups, and the molecule weight is lower than 300 g/mol. Preferred Parameters: The binding force of the coating and the ice is lower than 300 N; and the wear consumption is lower than 50 mg.