Studies on the elimination of CFC-11 Freon from rigid polyurethane foams
Polimery 1993, No 8-9, 438
The blowing agents alternative to CFC-11 were described. The blowing agents for the production of rigid polyurethane foams were presented with a special attention paid to their drawbacks and advantages. The literature data concerning properties of freons, a.o. their ozone depiction potentials (ODP values) were cited. For the laboratory scale carbon dioxide (generated in the reaction of water with diisocyanate) and pentane were chosen. Foams basing on our own system with a constant amount of water were obtained. As the second blowing agent, CFC-11 was used and it was replaced gradually in the range of 0–100% by pentane. The typical properties of rigid polyurethane foams were characterized and an analysis of the obtained results was made.
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