Method of decomposing a polyurethane

Details Method of decomposing a polyurethane Method of decomposing a polyurethane

C - Chemistry, Metallurgy

07

C

C07C 43/11 (2006.01) C07C 41/18 (2006.01) C07C 209/62 (2006.01) C07C 211/50 (2006.01) C07C 273/18 (2006.01) C07C 275/28 (2006.01) C08J 11/28 (2006.01)

Patent

CA 2342464

A method of recovering a decomposition product from a polyurethane, the method comprising the steps of thermally decomposing a polyurethane into a liquid containing a polyol and a urea compound which is soluble in the polyol, and solids containing a urea compound which is insoluble in the liquid in the presence of a polyamine compound at a temperature of 120 to 250°C; removing the solids; hydrolyzing the residue with water retained at a high temperature of 200 to 320°C and a high pressure; and recovering the resulting polyamine and/or polyol.

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