(WO9409082-A1)      Constant b.pt. compsn. comprises (by wt.) 67-75% CH2F2 (I) and 25-33% C3H8 (II). The compsn. has vapour pressure ca 309 psia at 25 deg.C.    Pref. compsn. comprises ca 70 wt.% (I) and 30 wt.% (II), and has b.pt. ca -15.3 deg.C/4832 torr. The compsn. may be condensed and then evapd. in the vicinity of a body to be cooled. Other fluorocarbons may be added to the (I)/(II) mixt. without changing the azeotropic-like character of the compsn. including CHClF2, and C2HF5.    USE/ADVANTAGE -   The compsns. are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polymers (e.g. for polyolefins and polyurethanes), and as power cycle working fluids. The compsns. are also useful in providing heat e.g. in heat pumps.    (EP664822-A1)      Constant b.pt. compsn. comprises (by wt.) 67-75% CH2F2 (I) and 25-33% C3H8 (II). The compsn. has vapour pressure ca 309 psia at 25 deg.C.    Pref. compsn. comprises ca 70 wt.% (I) and 30 wt.% (II), and has b.pt. ca -15.3 deg.C/4832 torr. The compsn. may be condensed and then evapd. in the vicinity of a body to be cooled. Other fluorocarbons may be added to the (I)/(II) mixt. without changing the azeotropic-like character of the compsn. including CHClF2, and C2HF5.    USE/ADVANTAGE -   The compsns. are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polymers (e.g. for polyolefins and polyurethanes), and as power cycle working fluids. The compsns. are also useful in providing heat e.g. in heat pumps    (JP8502477-W)      Constant b.pt. compsn. comprises (by wt.) 67-75% CH2F2 (I) and 25-33% C3H8 (II). The compsn. has vapour pressure ca 309 psia at 25 deg.C.    Pref. compsn. comprises ca 70 wt.% (I) and 30 wt.% (II), and has b.pt. ca -15.3 deg.C/4832 torr. The compsn. may be condensed and then evapd. in the vicinity of a body to be cooled. Other fluorocarbons may be added to the (I)/(II) mixt. without changing the azeotropic-like character of the compsn. including CHClF2, and C2HF5.    USE/ADVANTAGE -   The compsns. are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polymers (e.g. for polyolefins and polyurethanes), and as power cycle working fluids. The compsns. are also useful in providing heat e.g. in heat pumps    (EP664822-B1)      Constant b.pt. compsn. comprises (by wt.) 67-75% CH2F2 (I) and 25-33% C3H8 (II). The compsn. has vapour pressure ca 309 psia at 25 deg.C.    Pref. compsn. comprises ca 70 wt.% (I) and 30 wt.% (II), and has b.pt. ca -15.3 deg.C/4832 torr. The compsn. may be condensed and then evapd. in the vicinity of a body to be cooled. Other fluorocarbons may be added to the (I)/(II) mixt. without changing the azeotropic-like character of the compsn. including CHClF2, and C2HF5.    USE/ADVANTAGE -   The compsns. are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polymers (e.g. for polyolefins and polyurethanes), and as power cycle working fluids. The compsns. are also useful in providing heat e.g. in heat pumps