(WO9421718-A1)      Polymer foam compsn. comprises: (a) a foamable plastic free of polyisocyanate-based polymers; and (b) a blowing agent consisting of (i), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) combined with (ii) hydrocarbon(s) or partially halogenated alkanes.    Pref. the hydrocarbon is selected from propane, butane, isobutane, n-pentane, i-pentane, neopentane, n-hexane, 2-methylpentane, 3-methylpentane and 2,2-dimethylbutane. The alkanes have b.pts. of less than 50 deg.C and contain 4C or less. Most pref. alkanes are: 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), 1,1,2,2-tetrafluoroethane (HFC-134), 1-chloro-1,1-difluoroethane (HCFC-142b), and 1,1,1,2,3,3-hexafluoropropane (HFC-236ea).    USE/ADVANTAGE -   The compsns. are used in the prodn. of cellular plastics such as polystyrene, PVC, PE and other polyisocyanate-based foams. The compsns. are nontoxic, chemically stable, of reduced or zero flammability, and they also have improved compatibility in liq. systems, and do not contribute to photochemical smog. With as little as 5 wt.% HFC-227ea combined with a flammable adjuvant, a foam can be formed with flammability characteristics only slightly less than those of foams blown with CFC-11.    (ZA9401859-A)      Polymer foam compsn. comprises: (a) a foamable plastic free of polyisocyanate-based polymers; and (b) a blowing agent consists of (i), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) combined with (ii) hydrocarbon(s) or partially halogenated alkanes. (b) is new.    Pref. the hydrocarbon is selected from propane, butane, isobutane, n-pentane, i-pentane, neopentane, n-hexane, 2-methylpentane, 3-methylpentane and 2,2-dimethylbutane. The alkanes have b.pts. of less than 50 deg.C and contain 4C or less. Most pref. alkanes are: 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), 1,1,2,2-tetrafluoroethane (HFC-134), 1-chloro-1,1-difluoroethane (HCFC-142b), and 1,1,1,2,3,3-hexafluoropropane (HFC-236ea). Concn. of (i) is 60-95 wt. % and concn. of (ii) 5-40 wt. %.    USE/ADVANTAGE -   The compsns. are used in the prodn. of cellular plastics such as polystyrene, PVC, PE and other polyisocyanate-based foams. The compsns. are nontoxic, chemically stable, of reduced or zero flammability, and they also have improved compatibility in liq. systems, and do not contribute to photochemical smog. With as little as 5 wt. % HFC-227ea combined with a flammable adjuvant, a foam can be formed with flammability characteristics only slightly less than those of foams blown with CFC-11.    (EP690887-A1)      Polymer foam compsn. comprises: (a) a foamable plastic free of polyisocyanate-based polymers; and (b) a blowing agent consists of (i), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) combined with (ii) hydrocarbon(s) or partially halogenated alkanes. (b) is new.    Pref. the hydrocarbon is selected from propane, butane, isobutane, n-pentane, i-pentane, neopentane, n-hexane, 2-methylpentane, 3-methylpentane and 2,2-dimethylbutane. The alkanes have b.pts. of less than 50 deg.C and contain 4C or less. Most pref. alkanes are: 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), 1,1,2,2-tetrafluoroethane (HFC-134), 1-chloro-1,1-difluoroethane (HCFC-142b), and 1,1,1,2,3,3-hexafluoropropane (HFC-236ea). Concn. of (i) is 60-95 wt. % and concn. of (ii) 5-40 wt. %.    USE/ADVANTAGE -   The compsns. are used in the prodn. of cellular plastics such as polystyrene, PVC, PE and other polyisocyanate-based foams. The compsns. are nontoxic, chemically stable, of reduced or zero flammability, and they also have improved compatibility in liq. systems, and do not contribute to photochemical smog. With as litle as 5 wt. % HFC-227ea combined with a flammable adjuvant, a foam can be formed with flammability characteristics only slightly less than those of foams blown with CFC-11.