Preparation and application of high strength, high transparency, and high impact resistance polyurethane elastomers by controlled cross-linking

In recent years, polyurethane elastomer has been widespread used in automotive, aerospace, and other fields depending on its wide range of adjustable properties, both high elasticity of rubber and plastic rigidity. Its high transparency and high strength have attracted increasing attention, especially in the application of laminated safety glass. In this work, an aliphatic polyurethane film with superior dynamic impact resistance, optical and mechanical properties were successfully obtained by controlling the cross-linking agent and cross-linking degree. The effects of different cross-linking point structures on the structure and properties of aliphatic polyurethane were revealed. The optimal bonding strength and tensile strength can reach 1.7 MPa and 43 MPa, which are 170 % and 301 % higher than those of polyurethane, respectively. The transmittance of the aliphatic polyurethane can reach 80 %. Extremely superior impact resistance of the laminated safety glass based on the aliphatic polyurethane have been verified. The ultimate bearing capacity was 14 times of unmodified polyurethane. It will have huge application potential in the fields of aerospace, construction and automotive.