Azeotrope-like compositions of trichlorofluoromethane, dichlorotrifluoroethane and isopentane
AssigneeAllied-Signal Inc.
InventorsEarl E. A. Lund, Robert G. Richard, Ian R. Shankland
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Abstract
Azeotrope-like compositions comprising trichlorofluoromethane, a dichlorotrifluoroethane selected from the group consisting of 1,1-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane and isopentane are novel compositions particularly useful as blowing agents in the preparation of polyurethane and polyisocyanurate foams.
Claims13
Azeotrope-like compositions comprising from about 66 to about 80 weight percent trichlorofluoromethane, from about 17 to about 15 weight percent of a dichlorotrifluoroethane selected from the group consisting of 1,1-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane.
Dependencies are inferred from the claim text.