Refrigerant compositions

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 5/04 (2006.01)

Patent

CA 2195411

A composition for use in a heat transfer device such as a refrigeration or air conditioning system is described which comprises: (A) at least one hydrofluorocarbon selected from the group consisting of difluoromethane (R-32) and 1,1,1-trifluoroethane (R-143a), (B) pentafluoroethane (R-125), (C) at least one hydrocarbon, and optionally (D) at least one hydrofluorocarbon selected from the group consisting of 1,1,1,2-tetrafluoroethane (R-134a) and 1,1,2,2-tetrafluoroethane (R-134).

Composition destinée à être utilisée dans un dispositif de transfert de chaleur tel qu'un système de réfrigération ou de climatisation. Cette composition comprend: (A) au moins un hydrofluorocarbure sélectionné dans le groupe formé par difluorométhane (R-32) et 1,1,1-trifluoroéthane (R-143a); (B) du pentafluoroéthane (R-125); (C) au moins un hydrocarbure, et éventuellement (D) au moins un hydrofluorocarbure sélectionné dans le groupe formé par 1,1,1,2-tétrafluoréthane (R-134a) et 1,1,2,2-tétrafluoroéthane (R-134).

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