Normal-temperature solidification polyurethane elastomer waterproof material and preparation method thereof

The invention discloses a normal-temperature solidification polyurethane elastomer waterproof material and a preparation method thereof. The polyurethane waterproof material comprises a component A and a component B. Proportioning by weight percent, the component A is an isocyanate prepolymer with the content of 4-15% of isocyanic acid radical NCO; the component B comprises 0-65% of polyether glycol with the degree of functionality of 2-3 and the molecular weight of 1,000-5,000, 0.6-1.2% of organic bismuth catalyst, 20-27.5% of polybasic amine, 0-1.3% of antioxidant and 12.5-71.9% of plasticizer. The component A and the component B are mixed according to the weight ratio of 100(60-81); the material obtained by room-temperature solidification has the mechanical properties that the tensile strength is 15-35MPa, the tearing strength is 44-62N/mm, the breaking elongation rate is 405-840%, and the Shao' hardness is 75-90A.