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 show good mechanical properties at high temperature. As a filling type foam material, it can greatly improve the mechanical properties and maximum Operating temperature. Background technique [0002] General polyurethane foam materials may show high strength and toughness at room temperature, but at temperatures above 80 °C, their mechanical properties will drop sharply under a certain load, which also means that this foam material cannot be used at high temperatures. in use. [0003] The known high temperature resistant polyurethane foam material is modified by polyether polyol to increase the aromatic structure, or to use polyether polyol with high hydroxyl value to increase the crosslinking density. Another method to improve high temperature resistance is to copolymerize polyether polyols with silicone resins. Improved pro...

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