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Patent Searching and Data


Title:
AZEOTROPIC OR AZEOTROPE-LIKE COMPOSITIONS OF AMMONIA AND HYDROFLUOROCARBONS
Document Type and Number:
WIPO Patent Application WO/1994/007971
Kind Code:
A1
Abstract:
Constant boiling azeotropic or azeotrope-like compositions of ammonia and 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, difluoromethane, pentafluoroethane or 1,1,1,2,3,3,3-heptafluoropropane are disclosed that are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.

Inventors:
SHIFLETT MARK BRANDON
YOKOZEKI AKIMICHI
Application Number:
PCT/US1993/008608
Publication Date:
April 14, 1994
Filing Date:
September 17, 1993
Export Citation:
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Assignee:
DU PONT (US)
International Classes:
C07C19/08; C09K3/00; C08J9/12; C09K3/30; C09K5/04; (IPC1-7): C09K5/04; C09K3/30
Foreign References:
US1631573A1927-06-07
EP0428402A11991-05-22
US4724679A1988-02-16
DE3909105A11990-09-27
Other References:
DATABASE WPI Section Ch Week 8310, Derwent World Patents Index; Class E16, AN 83-23340K
DATABASE WPI Section Ch Week 8652, Derwent World Patents Index; Class E11, AN 86-342476
DATABASE WPI Section Ch Derwent World Patents Index; Class E18, AN 71-61135S
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