(US5182040-A)      Azeotrope-like compsn. comprises about 60-99 wt. % 1,1,2,2-tetrafluoroethane (I) and about 1-40 wt. % dimethyl ether. The compsn. has a boiling point of about 0 deg. C. When the pressure is adjusted to about 28 psig and comprises about 74 wt. % (I). Processes are claimed for producing refrigeration, polymer foam and aerosol formulations.    The polymer foam is prepd. by solubilising 5-30 wt. % of the azeotrope-like compsn. as a blowing agent in the polymer formulation by blowing the formulation into a polymer foam e.g, Pu foam, phenolic foam or polystyrene foam.    USE/ADVANTAGE -   (I) is used as a refrigerant, aerosol propellant or foam blowing agent, although azeotropes after the possibility of producing more economical nonfractionating systems with improved properties such as refrigeration performance, polymer and refrigerant oil solubility. The compsn. is also useful as a fire extinguishant    (JP6508825-W)      Compsns. comprises 1,1,2,2-tetrafluoroethane (HFC-134) and one of 1,1-difluoroethane (HFC-152a), 1-chloro-1,1-difluroethane (HCFC-142b), dimethyl ether (DME), perflurocyclobutane (FC-318), n-butane, isobutane and 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea).    Specifically claimed is a combination of HFC-134 with each of the other listed cpds. e.g. a compsn. comprising 92 wt.% HFC-134 and 8 wt.% HFC-152a which has a b. pt. of 10 deg. C when the pressure is adjusted to 46 psia. A compsn. comprising 74 wt.% HFC-134 and 26 wt.% DME has a b.pt. of 0 deg. C when the pressure is adjusted to 28 psia..    USE -   Useful as refrigerants, aerosol propellants and blowing agents for polymer foams. Azoetrope-type mixts. of 1,1,1,2-tetrafluoroethane or of FC-C318 and HFC-227ea are used as fire extinguishants.n    (EP577750-B1)      Compsns. comprises 1,1,2,2-tetrafluoroethane (HFC-134) and one of 1,1-difluoroethane (HFC-152a), 1-chloro-1,1-difluroethane (HCFC-142b), dimethyl ether (DME), perflurocyclobutane (FC-318), n-butane, isobutane and 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea).    Specifically claimed is a combination of HFC-134 with each of the other listed cpds. e.g. a compsn. comprising 92 wt.% HFC-134 and 8 wt.% HFC-152a which has a b. pt. of 10 deg. C when the pressure is adjusted to 46 psia. A compsn. comprising 74 wt.% HFC-134 and 26 wt.% DME has a b.pt. of 0 deg. C when the pressure is adjusted to 28 psia..    USE -   Useful as refrigerants, aerosol propellants and blowing agents for polymer foams. Azoetrope-type mixts. of 1,1,1,2-tetrafluoroethane or of FC-C318 and HFC-227ea are used as fire extinguishants.n