Title:
【発明の名称】ジフルオロメタンとテトラフルオロエタンの組成物
Document Type and Number:
Japanese Patent JP3369559
Kind Code:
B2
Abstract:
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.
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Inventors:
Vivense, Donald Bernard
Shift Brand, Mark Brandon
Shift Brand, Mark Brandon
Application Number:
JP50854893A
Publication Date:
January 20, 2003
Filing Date:
October 29, 1992
Export Citation:
Assignee:
E. I. Dupont Do Nemour & Company
International Classes:
F25B1/00; A62D1/00; C07C19/08; C08J9/14; C09K3/00; C09K3/30; C09K5/04; C11D7/30; C11D7/50; (IPC1-7): C07C19/08; C09K5/04; F25B1/00
Domestic Patent References:
| JP3168284A | ||||
| JP3170585A | ||||
| JP3170586A | ||||
| JP3170587A |
Attorney, Agent or Firm:
Heiyoshi Odashima (1 person outside)