High-performance polyurethane elastomer and preparation method thereof

The invention discloses a high-performance polyurethane elastomer and a preparation method thereof. The high-performance polyurethane elastomer comprises two parts, i.e., a prepolymer component (component A) and a chain extender (component B), wherein the component A comprises the following materials in parts by weight: 100 parts of macromolecular dihydric alcohol and 14-35 parts of PPDI; the component B comprises the following materials in parts by weight: 100 parts of chain extender and 0.1-0.5 part of catalyst; the weight ratio of the component A to the component B is 100: 6-15; the chain extender is micromolecular dihydric alcohol, three-functionality-degree alcohol amine, three-functionality-degree alcohol or combination thereof; the micromolecular dihydric alcohol is selected from resorcinol-bi(beta-ethoxyl) ether (HER) or composition of the resorcinol-bi (beta-ethoxyl) ether (HER) and p-hydroquinone-bi(beta-ethoxyl) ether (HQEE) in the weight ratio of 1:0-2. The obtained elastomer material has the advantages that the permanent deformation is small, the resilience is excellent, the heat resistance and the mechanical performance are good and the temperature for the use and the operation of the prepolymer is low.