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    • 7. 发明授权
    • Compositions of difluoromethane and tetrafluoroethane
    • 二氟甲烷和四氟乙烷的组成
    • US5290466A
    • 1994-03-01
    • US963310
    • 1992-10-16
    • Mark B. Shiflett
    • Mark B. Shiflett
    • F25B1/00A62D1/00C07C19/08C08J9/14C09K3/00C09K3/30C09K5/04C11D7/30C11D7/50
    • C08J9/146A62D1/0057C09K3/30C09K5/045C08J2207/04C09K2205/22C09K2205/32
    • Compositions of difluoromethane, 1,1,1,2-tetrafluoroethane, and 1,1,2,2-tetrafluoroethane are useful as refrigerants, aerosol propellants, heat transfer edia, gaseous dielectrics, fire extinguishing agents, expansion agents for polymers such as polyolefins and polyurethanes, and as power cycle fluids.Near azeotropic compositions comprise admixtures of effective amounts of difluoromethane and tetrafluoroethane to form a near azeotropic composition. Such compositions are useful as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
    • 二氟甲烷,1,1,1,2-四氟乙烷和1,1,2,2-四氟乙烷的组合物可用作制冷剂,气溶胶推进剂,热转移剂,气体电介质,灭火剂,聚合物如聚烯烃的膨胀剂 和聚氨酯,以及动力循环流体。 近共沸组合物包含有效量的二氟甲烷和四氟乙烷的混合物以形成近共沸组合物。 这样的组合物可用作制冷剂,清洁剂,聚烯烃和聚氨酯的膨胀剂,制冷剂,气溶胶推进剂,传热介质,气体电介质,灭火剂,动力循环工作流体,聚合介质,除尘流体,载体流体,抛光磨料 代理和置换干燥剂。