C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 5/04 (2006.01)
Patent
CA 2105565
The present invention provides refrigerant blends which are replacements for chlorodifluoromethane (HCFC-22). The present blends have refrigeration characteristics which are similar to HCFC- 22. The blends comprise from about 10 to about 90 weight percent of a first component selected from the group consisting of 1,1,1-trifluoroethane, difluoromethane, propane, and mixture thereof; from about 1 to about 50 weight percent of a second component selected from the group consisting of hydroflu- orocarbon having 1 to 3 carbon atoms, fluorocarbon having 1 to 3 carbon atoms, inorganic compound, and mixtures thereof hav- ing a boiling point at atmospheric pressure in the range from about -90 degrees C to less than -50 degrees C; and from about 1 to about 50 weight percent of a third component which is hydrofluorocarbon having 1 to 3 carbon atoms, other than 1,1,1-trifluoroe- thane, having a boiling point at atmospheric pressure in the range from about - 50 degrees C to about -10 degrees C. The refriger- ant compositions have a vapor pressure substantially equal to the vapor pressure of HCFC-22.
Richard Robert Gerard
Shankland Ian R.
Singh Rajiv Ratna
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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