TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The technological parameters of polyurethane prepolymer of ethers are as follows: the tensile strength (MPa) is more than 15-40, preferably more than 25-30, the Shore A hardness is 75 plus minus 5-95 plus minus 2, preferably 75 plus minus 5-85 plus minus 5, the elongation at rupture (%) is more than 300-500, preferably more than 350-400, the 300% stretching strength (MPa) is more than 6-18, preferably more than 8-15, the permanent deformation (%) is less than 10-30, preferably less than 10-15, the impact of elasticity (%) is more than 15-50, preferably more than 20-40, the tearing strength (KN/M) is more than 40-100, preferably more than 45-60, and the brittleness temperature ( degrees C) is less than -50 to -40, preferably less than -50 to -45. The technological parameters of polyurethane prepolymer of esters are as follows: the tensile strength (MPa) is more than 35-55, preferably more than 40-45, the Shore A hardness is 70 plus minus 3-96 plus minus 2, preferably 80 plus minus 3-85 plus minus 2, the elongation at rupture (%) is more than 400-500, preferably more than 500-550, the 300% stretching strength (MPa) is more than 5-17, preferably more than 10-12, the permanent deformation (%) is less than 10, the impact of elasticity (%) is more than 20, the tearing strength (KN/M) is more than 40-120, preferably more than 75-90, the brittleness temperature ( degrees C) is less than -35 to -30, and the abrasion (CC/1.61KM) is not greater than 0.01-0.08, preferably not greater than 0.01-0.02. The amino-contained polydimethylsiloxane is the aminoalkyl polydimethylsiloxane, e.g. aminoethyl aminopropyl polydimethylsiloxane, copolymer of 3-((2-aminoethyl)amino)propyl ethyl siloxane and dimethylsiloxane. The amino value of aminoalkyl polydimethylsiloxane is 0.2-1 mmol/g, preferably 0.4-0.8 mmol/g, and the viscosity (25 degrees C, pa.s) is 0.5-3.5, preferably 1-2. The hydroxyl-contained polydimethylsiloxane is the dihydroxy polydimethylsiloxane, the viscosity of dihydroxy polydimethylsiloxane (25 degrees C, pa.s) is 2-40, preferably 2-5, the volatile components (%) is not greater than 1-3, preferably not greater than 1.5-2, the surface curing time (hours) is not greater than 1-3, preferably not greater than 1.5-2. The catalyst is organic tin catalyst, e.g. stannous octoate, dibutyltin dilaurate, dibutyltin maleate, diacetatetin dilaurate, di(4-methylamino benzoic acid)dibutyltin, dibutyltin dilaurate thiolate, and/or di(6-methylamino hexanoic acid)dibutyltin. The solvent is butanone, tetrahydrofuran, dioxane, toluene and/or dimethylbenzene.