Verwendung von (Perfluoroalkyl)Äthylen als Treibmittel und/ oder Isoliergas für polymerische Schaumstoffe

摘要

To replace chlorofluorocarbons (especially CFCs 11, 12 and 113) as blowing agents and/or insulating gases in the manufacture of polymer foams, the invention proposes to employ a (perfluoroalkyl)ethylene of formula: RF-CH=CH2 in which RF denotes a linear or branched perfluoroalkyl radical containing from 1 to 6 carbon atoms. In contrast to CFCs 11, 12 and 113, (perfluoroalkyl)ethylenes are not capable of degrading stratospheric ozone.