LOW GWP HEAT TRANSFER COMPOSITIONS

摘要

The present invention relates, in part, to heat transfer compositions and methods that include (a) from about 60% to about 70% by weight of HFC-32; (b) from about 20% to about or less than 40% by weight of a compound selected from unsaturated-CF3 terminated propenes, unsaturated-CF3 terminated buteness, and combinations of these; and (c) from greater than about 0% to about 10% by weight of n-butane, isobutane, and combinations thereof.