| 摘要 |
<p>Heat transfer compositions and methods wherein the compositions have a burning velocity (BV) of less than about 10 and a global warming potential (GWP) of less than about 400 comprising: (a) from about 0 to about 50% by weight of HFC-32; (b) from about 50% to about 90% by weight of a compound selected from unsaturated -CF3 terminated propenes, unsaturated -CF3 terminated butenes, and combinations of these; and (c) from about 0 to about 25% by weight of a compound selected from HFO-1243zf, HFC-152a, and combinations of these, provided that the combination of components (a) and (c) together comprise at least about 10% by weight of the composition, and further provided that the amount of each of the components (a), (b) and (c) is selected to ensure that the BV of the composition is less than about 10 and the GWP of the composition is less than about 400.</p> |
