Refrigerant compositions

Details Refrigerant compositions Refrigerant compositions

C - Chemistry, Metallurgy

09

K

C09K 5/04 (2006.01)

Patent

CA 2278334

Refrigerant compositions are disclosed which comprise: (a) pentafluoroethane, octafluoropropane, trifluoromethoxydifluoromethane or hexafluoro-cyclopropane, or a mixture of two or more thereof, in an amount from 5 to 60 % based on the weight of the composition, (b) pentafluoroethane, 1,1,1,2- or 1,1,2,2- tetrafluoromethane, 1,1-difluoroethane, trifluoromethoxypentafluoroethane, 1,1,1,2,3,3,3-heptafluoropropane or 1,1,1,2,2,3,3-heptafluoroheptane, or a mixture of two or more thereof, in an amount from 30 to 94 % by weight based on the weight of the composition and (c) an unsubstituted hydrocarbon of the formula C n H m in which n is at least 4 and m is at least 2n-2, other than methyl propane, in an amount from 1 to 10 % by weight based on the weight of the composition.

L'invention concerne des compositions réfrigérantes comprenant: (a) du pentafluoroéthane, de l'octafluoropropane, du trifluorométhoxydifluorométhane ou du hexafluoro-cyclopropane ou un mélange d'au moins deux de ces produits, à raison de 5 à 60 % du poids de la composition; (b) du pentafluoroéthane, du 1,1,1,2- ou 1,1,2,2-tétrafluoroéthane, du 1,1-difluoroéthane, du trifluorométhoxypendafluoroéthane, du 1,1,1,2,3,3,3-heptafluoropropane ou du 1,1,1,2,2,3,3-heptaluoropropane, ou un mélange d'au moins deux de ces composants, à raison de 30 à 94 % en poids du poids de la composition et (c) un hydrocarbure non substitué de formule CnHm, dans laquelle n est au moins 4 et m est au moins 2n-2, autre que le méthyl-propane, à raison de 1 à 10 % en poids du poids de la composition.

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