Corrosion-resistant and weather-resistant polyurethane elastomer for surface protection application

• Main Authors: GUO SHAOFENG, LIU YUANYUAN, ZHU JUN, WEI LIUHE, SUN AILING, LIU XINGJIANG, LI YUHAN, WU KAI
• Format: Patent
• Language: Chinese; English
• Published: 22.07.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention belongs to the technical field of high polymer materials, and particularly relates to a corrosion-resistant and weather-resistant polyurethane elastomer for surface protection application, which is synthesized from three monomers, namely aliphatic or alicyclic diisocyanate, hydrogenated hydroxyl-terminated polybutadiene and a bifunctional secondary amine compound. According to the invention, a bifunctional secondary amine compound is selected as a chain extender, and generated ureido has relatively strong hydrogen bond energy and chemical bond energy, so that a hard segment phase is piled compactly, and the high temperature, oxygen and ultraviolet resistance of the hard segment phase is improved; hydrogenated hydroxyl-terminated polybutadiene is selected as a soft segment chain, a polyolefin main chain has excellent hydrophobic and gas barrier characteristics and hydrolysis and thermo-oxidative aging resistance, oxygen, water vapor, water-soluble ions and corrosive gas can be prevented from ente