Research on the Recycling and Reuse of Waste Polyurethane Rigid Foam
Using waste polyurethane rigid foam as raw material,the effect of degradation conditions on the degradation effect and the effect of degradation products on the properties of polyurethane rigid foam with open pore were studied.The effects of alcoholysis agents,aminolysis agent and catalysts on the solubility of rigid foam and the properties of products,as well as the effects of hydroxyl value and dosage of regenerated polyols on cell opening rate and dimensional stability were investigated.The results showed that the waste rigid foam could be effectively degraded by alcoholysis followed by amolysis with solid acid.When the hydroxyl value of the regenerated polyol was 550～800 mgKOH/g and the dosage was 10%～40%of combined polyether,the open-cell polyurethane rigid foam with excellent performance could be obtained.
polyurethane recoveryregenerated polyolopen-cellrigid polyurethane foamgreen and low carbonrecycling
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