Refrigerant compositions

Details Refrigerant compositions Refrigerant compositions

2007-07-16

2008-08-12

Hardee, John R (Department: 1796)

Compositions

Vaporization, or expansion, refrigeration or heat or energy...

With lubricants, or warning, stabilizing or anti-corrosion...

C257S067000

Reexamination Certificate

active

07410595

ABSTRACT:
Refrigerant composition are disclosed which comprises:(a) pentafluoroethane, trifluoromethoxydifluoromethane or hexafluorocyclopropane, or a mixture of two or more thereof, in an amount of at least 75% based on the weight of the composition,(b) 1,1,1,2- or 1,1,2,2-tetrafluoroethane, trifluoromethoxypentafluoroethane, 1,1,1,2,3,3-heptafluoropropane or a mixture of two or more thereof, in an amount of from 10 to 20% by weight based on the weight of the composition and(c) an ethylenically unsaturated or saturated hydrocarbon, optionally containing one or more oxygen atoms, with a boiling point from −50° C. to +35° C., or a mixture thereof in an amount from 1% to 4% by weight based on the weight of the composition the weight ratio of component (a):component (b) being at least 4:1.

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