Compositions comprising 1,1-difluoroethene, trifluoromethane and a third component
AssigneeMexichem Fluor S.A. De C.V.
InventorsRobert E. Low, Andrew Sharratt
Life of this patent
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Abstract
The present invention provides a composition, such as a refrigerant composition comprising 1, 1-difluoroethene (vinylidene fluoride, R-1132a); trifluoromethane (R-23); and one or more compound selected from hexafluoroethane (R-116), ethane (R-170) and carbon dioxide (R-744, CO2).
Claims60
A composition comprising:
- i) 1,1-difluoroethene (vinylidene fluoride, R-1132a);
- ii) trifluoromethane (R-23);
- and
- iii) one or more compound selected from hexafluoroethane (R-116), ethane (R-170) and carbon dioxide (R-744, CO2).
A composition according to any the preceding claims comprising from about 1 to about 98% by weight R-1132a.
A composition according to any the preceding claims comprising from about 35 to about 95% by weight R-1132a.
A composition according to any the preceding claims comprising from about 1 to about 98% by weight R-23.
A composition according to any the preceding claims comprising up to about 80% by weight R-116.
A composition according to any of the preceding claims comprising from about 1 to about 40% by weight R-116, from about 5 to about 98% by weight R-1132a and from about 5 to about 98% by weight R-23.
A composition according to any of the preceding claims comprising up to 40% by weight R-170.
A composition according to any of the preceding claims comprising less than about 10% by weight carbon dioxide, which does not contain carbon dioxide.
A composition according to any of the preceding claims consisting essentially of stated components.
A composition according to any of the preceding claims which is azeotropic.
A composition according to any of the preceding claims, wherein the composition is less flammable than R-1132a alone.
A composition according to any of the preceding claims which is non-flammable.
A composition according to any of the preceding claims which has a temperature glide in an evaporator or condenser of less than about 10 K, preferably less than about 5 K.
A composition according to any of the preceding claims which has a critical temperature of greater than about 0° C., preferably greater than about 10° C.
A composition according to any of the preceding claims whose volumetric refrigeration capacity is at least 90% of that of R-508 at comparable cycle conditions.
A composition according to any of the preceding claims whose compressor discharge temperature is within 15 K of that of R-508 at comparable cycle conditions.
A composition comprising a lubricant and a composition according to any of the preceding claims.
A composition comprising a stabiliser and a composition according to any of the preceding claims.
A composition comprising a flame retardant and a composition according to any of the preceding claims.
Any novel heat transfer composition substantially as hereinbefore described, optionally with reference to the examples.
Dependencies are inferred from the claim text.