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US 7,534,366 B2Granted
Compositions containing fluorine substituted olefins
AssigneeHoneywell International Inc.
InventorsRajiv R. Singh, Hang T. Pham, David P. Wilson, Raymond H. Thomas, Ian Shankland
Life of this patent
Estimating the term…
Abstract
The use of pentafluoropropene (HFO-1225) and tetrafluoropropene (HFO-1234) in refrigeration equipment is disclosed. These materials are generally useful as refrigerants for heating and cooling, as blowing agents, as aerosol propellants, as solvent composition, and as fire extinguishing and suppressing agents.
Claims25
A heat transfer composition for use in an air conditioning system comprising:
- (a) at least about 50% by weight of 1,1,1,2-tetrafluoropropene (HFO-1234yf) having no substantial acute toxicity;
- and
- (b) at least one poly alkylene glycol lubricant in the form of a homopolymer or co-polymer consisting of 2 or more oxypropylene groups and having a viscosity of from about 10 to about 200 centistokes at about 37° C.
Dependencies are inferred from the claim text.