Moreover, the glycolysis of rigid polyurethane foam with potassium acetate as catalyst, triethylene
glycol as the agent was investigated. Polyurethane foam was used as raw material to produce preformed
polymer. The effect of the amount of the alcohlysis product in the preformed polymer on the physical and
mechanical properties of polyurethane waterproof coating was also discussed. The results showed that
excellent performance sample was obtained when the recycled polyol content in a component was 20wt%,
using potassium acetate as catalyst and the content was 2.0 wt% [28].