High-performance rigid polyurethane foam material containing epoxide group

Abstract

The invention relates to a rigid polyurethane foam material, in particular to a high-performance rigid polyurethane foam material containing epoxide group, which is characterized by being prepared by the reaction of the following components: isocyanate with 28-32wt% of NCO, polyalcohol compound with the OH value of 300-800, epoxy resin with the epoxy equivalent weight more than 100, catalyst compound, foam stabilizer and water, wherein the isocyanate component at least contains polyaryl polymethylene isocyanate; the polyalcohol compound at least contains polyalcohol component taking tolylenediamine as initiator; and the catalyst compound at least contains imidazole derivative catalyst, tertiary amine catalyst and organo-metallic catalyst. The rigid polyurethane foam material has high strength and super toughness as well good size stability, maintains excellent mechanical performance at higher temperature, and can be applied to wood-imitation material, filling material, thermal insulation material and the like.

Description

technical field [0001] The invention relates to a rigid polyurethane foam material, which has certain high strength and high toughness, and can also exhibit good mechanical properties at high temperatures. As a filling type foam material, it can greatly improve the mechanical properties of objects and the highest Operating temperature. Background technique [0002] General polyurethane foam may exhibit high strength and toughness at room temperature, but its mechanical properties will drop sharply under a certain load above 80°C, which also means that this foam cannot withstand high temperatures. in use. [0003] Known high-temperature-resistant polyurethane foam materials are modified polyether polyols to increase the aromatic structure, or use polyether polyols with high hydroxyl values ​​to increase crosslinking density. Another way to improve high temperature resistance is to copolymerize polyether polyols with silicone resins. Improved properties were obtained by dem...

AI Technical Summary

Problems solved by technology

[0002] General polyurethane foam may exhibit high strength and toughness at room temperature, but its mechanical properties will drop sharply under a certain load above 80°C, which also means that this foam cannot withstand high temperatures. in use