Bridge waterproof polyurethane elastomer as well as preparation method and application thereof

• Main Authors: DONG QUANXIAO, YANG KAI, BAO XINGXU, LIU KUAN, YAN SIMENG, GUO YUBAO, NIU RUIXUE, ZHANG LING, SONG TIANTIAN, CUI XUELIANG, LIU SONGRAN, QIU PENG, SHEN YITONG, LIU XIAORU, HU XUEHUAN
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2023
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; ASSEMBLY OF BRIDGES; CHEMISTRY; COMPOSITIONS BASED THEREON; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; OR VIADUCTS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a bridge waterproof polyurethane elastomer and a preparation method and application thereof.The bridge waterproof polyurethane elastomer comprises a prefabricated shape follow-up hollow polyurethane elastomer and a cast-in-situ negative Poisson's ratio polyurethane material, and the prefabricated shape follow-up hollow polyurethane elastomer is filled with the cast-in-situ negative Poisson's ratio polyurethane material; stress generated by stretching of the bridge waterproof polyurethane elastomer in the transverse direction and the longitudinal direction is relieved, cracking of the interior and the interface of the bridge waterproof polyurethane elastomer is prevented, the service life of a product is prolonged, meanwhile, due to the fact that the prefabricated polyurethane elastomer expansion joint is in an extruded state, the large-size expansion joint cannot sink under the gravity effect, and the preparation method is simple, feasible and low in cost. The method is suitable for l