Polyurethane foam is easy decomposed and formed the condition of containing hydroxyl and amino
compounds in the primary amine, secondary amine compound. Decomposition mechanism is similar to
ester exchange reaction. The amino group is active and the reaction can happen under low temperature.
Carbamate base, biuret base, urea base formic acid ester and urea group fracture, generated a series of
new multiple amine, polyol and aromatic compounds