Patent number: 5562854
Abstract: The invention includes compositions of 1,2,2,3,3,4,4,4-octafluorobutane and bis(fluoromethyl) ether, 2,2,4,4-tetrafluorooxetane, 2,2,3,3-tetrafluorooxetane, 1-difluoromethoxy-1,1,2,2-tetrafluoroethane, 1-difluoromethoxy-1,2,2,2-tetrafluoroethane, 2,2,3,3,4,5,5-heptafluorotetrahydrofuran or 2,2,3,3,4,4,5-heptafluorotetrahydrofuran; 1,1,1,2,3,4,4,4-octafluorobutane and bis(fluoromethyl) ether, 2,2,4,4-tetrafluorooxetane, 2,2,3,3-tetrafluorooxetane, 1-difluoromethoxy-1,1,2,2-tetrafluoroethane, 1-difluoromethoxy- 1,2,2,2-tetrafluoroethane, 2,2,3,3,4,5,5-heptafluorotetrahydrofuran, or 2,2,3,3,4,4,5-heptafluorotetrahydrofuran; 1,1,1,2,2,4,4,4-octafluorobutane and bis(fluoromethyl) ether, 2,2,4,4-tetrafluorooxetane or 2,2,3,3-tetrafluorooxetane; or 1,1,2,2,3,3,4,4-octafluorobutane and methyl tert-butyl ether, bis(fluoromethyl) ether or 1,1,1,2,2,3,3-heptafluoro-3-(1,2,2,2-tetrafluoroethoxy)propane.
Type:
Grant
Filed:
September 29, 1994
Date of Patent:
October 8, 1996
Assignee:
E. I. Du Pont de Nemours and Company
Inventor:
Barbara H. Minor