Polyurethane damping material containing dynamic disulfide bonds and imine bonds and preparation method thereof

• Main Authors: DONG GUANGCHAO, ZHAO LIFEN, CHANG YUANZHI, ZHUANG YINGZAN, TIAN XIUJUAN, CUI RUIYANG
• Format: Patent
• Language: Chinese; English
• Published: 30.09.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to the technical field of polyurethane damping materials, in particular to a polyurethane damping material containing dynamic disulfide bonds and imine bonds and a preparation method of the polyurethane damping material. The preparation method comprises the following steps: reacting cystine, an alcohol compound and thionyl chloride to introduce a dynamic disulfide bond and an intramolecular hydrogen bond into a system, and reacting with an aldehyde compound to synthesize a polyurethane chain extender simultaneously containing the dynamic disulfide bond and an imine bond. Or diaminodiphenyl disulfide and an aldehyde compound are adopted to synthesize a polyurethane chain extender with the dynamic disulfide bond and the imine bond in absolute ethyl alcohol, and finally the polyurethane chain extender reacts with the polyurethane prepolymer to generate the polyurethane damping material containing the dynamic disulfide bond and the imine bond. According to the polyurethane damping material,