Open-pore polyurethane rigid foam prepared from polyurethane rigid foam degradation liquid

Abstract

The invention relates to an open-pore polyurethane rigid foam prepared from a polyurethane rigid foam degradation liquid. The open-pore polyurethane rigid foam is prepared by reacting the polyurethane rigid foam degradation liquid, a polyhydric alcohol formula composition, a foaming agent and polyisocyanate, wherein the polyurethane rigid foam degradation liquid accounts for 0.1%-15% of the total weight of a material, the polyhydric alcohol formula composition accounts for 20%-52% of the total weight of the material, the foaming agent accounts for 0.3%-15% of the total weight of the material, and an isocyanate index is 70-140. According to the open-pore polyurethane rigid foam, the waste polyurethane rigid foam degradation liquid is firstly used for synthesizing the open-pore polyurethane foam with high aperture ratio and lower density, one the one hand, the problem of environmental pollution brought by a waste polyurethane rigid foam is solved, and on the other hand, the cost of raw materials is reduced, and considerable economic benefit is achieved. The prepared open-pore polyurethane rigid foam achieves the aperture ratio more than 70% and is low in density, thereby being a very good sound absorbing material used in building. The prepared open-pore polyurethane rigid foam is capable of providing an effective technical support for recycling the waste polyurethane rigid foam.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an open-cell polyurethane rigid foam and a preparation method thereof, and more particularly to using a polyurethane rigid foam degradation liquid as a kind of polyol to obtain an open-cell polyurethane rigid foam. Background technique [0002] At present, with the continuous updating of high technology and the continuous improvement of people's living standards, a large amount of polyurethane rigid foam waste is produced every year. If such a large amount of waste polyurethane rigid foam cannot be recycled in time, it will cause serious damage to our ecological environment. In response to this situation, scientific and technological personnel in the industry recycle and reuse it through various methods. The recycling and utilization of waste polyurethane rigid foam can make the rational use of resources in our country, and also make a significant contribution to the s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of environmental pollution of waste polyurethane rigid foam, using waste polyurethane rigid foam degradation solution to synthesize open-cell polyurethane foam with high open cell ratio and lower density

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