Chlorofluorocarbons substitution in rigid polyurethane foams
Résumé
The substitution of chlorofluorocarbons (CFC) has represented a major challenge not only for the fluid producers but also for the final users who relied on these molecules. Rigid polyurethane foams have been profoundly affected by this change. This paper will especially address the consequence of the CFC-11 substitution on the formulation itself of rigid polyurethane foams. In a second part, the overall impact on the environment of current and future substitutes will be reviewed : contributions to the global warming and to the creation of tropospheric ozone.