Study on the Chemical Recycling of Rigid Polyurethane Foam Insulation Board for Construction
발표자
()
초록
내용
Rigid polyurethane foams (RPUF) for construction are difficult to liquefy due to containing the polyester polyol and flame retardants as raw materials. In our study, the liquefaction of RPUFs for construction was successfully carried out using an excess of glycol in the presence of a catalyst. However, the residual glycol in the liquefied product negatively affects the curing and physical properties of RPUFs. In addition, the residual glycol has a high boiling point, making it difficult to remove, and even if it is removed, the viscosity of the liquefied product increases significantly, making it challenging to use as a polyol. Therefore, in this study, the recycled polyol was synthesized through liquefaction process of RPUF and chemical modification to remove the residual glycol. The modified recycled polyol exhibited low viscosity and excellent compatibility with conventional polyol for RPUF. Moreover, the manufactured RPUF containing recycled poyol showed stable foaming tendencies and curing properties.