Research on synthesis and properties of room temperature curing polyurethane damping materials

Room temperature curing polyurethane (PU) damping materials were synthesized with PU prepolymer and self-made curing agent. The prepolymer was synthesized from poly (neopentyl adipate) with higher side methyl content and toluene diisocyanate. Effects of molecular weight of poly (neopentyl adipate) and curing agent types on mechanical properties and damping properties of PU damping materials were investigated. Results showed that tensile strength of room temperature curing PU damping materials is 22.4MPa and the tan δmax reaches 1.10. The damping temperature range of tanδ>0.3 is more than 60°C, which is a kind of damping material with excellent comprehensive properties. (paper)