Patent Number: 7,713,434

Title: Refrigerant compositions

Abstract: Disclosed is a non-flammable refrigerant composition consisting of pentafluoroethane in an amount from 62% to 67% based on the weight of the composition; a second component selected from 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, and mixtures thereof in an amount from 26% to 36% by weight based on the weight of the composition; and an ethylenically unsaturated or saturated hydrocarbon compound that is at least 80% isobutane in an amount of from 3% to 4% by weight of the composition. Optionally, the composition may include at least one lubricant, at least one additive or combinations thereof.

Inventors: Roberts; Neil Andre (Bristol, GB), Chambers; Owen Ross (Watford Hertfordshire, GB)

Assignee: E.I. du Pont de Nemours and Company

International Classification: C09K 5/04 (20060101)

Expiration Date: 5/11/12018