abstract |
Use, as a blowing agent, of a blowing agent composition comprising trans-1,3,3,3-tetrafluropropene (trans-HFO-1234ze) in the production of an extruded thermoplastic foam, wherein the trans- HFO-1234ze is present in an amount that is at least 5% by weight of the composition, and the composition has a Global Warming Potential (GWP) of not more than 500 and an Ozone Depletion Potential (ODP) of not more than 0 , 05. |