Azeotrope-like compositions of 1,1,1,3,3-pentaflurorpropane and hydrocarbons
AssigneeAlliedSignal Inc.
InventorsEarl August Eugene Lund, deceased, Robert Christian Parker, Ian Robert Shankland
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Abstract
Azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and at least one hydrocarbon selected from the group n-pentane, iso-pentane, cyclopentane, n-hexane and iso-hexane are provided. The compositions of the invention are useful in the preparation of polyurethane and polyisocyanurate foams.
Claims6
An azeotrope-like composition consisting essentially of 1,1,1,3,3-pentafluoropropane present in an amount from about 95 to about 40 weight percent and cyclopentane present in an amount from about 5 to about 60 weight percent and having a boiling point of 11.7.degree..+-.1.degree. C. at 745 mm Hg.
An azeotrope-like composition consisting essentially of 1,1,1,3,3-pentafluoropropane present in an mount from about 98 to about 55 weight percent and n-hexane present in an amount from about 2 to about 45 weight percent and having a boiling point of 14.degree..+-.1.degree. C. at 749 mm Hg.
An azeotrope-like composition consisting essentially of 1,1,1,3,3-pentafluoropropane present in an amount from about 98 to about 55 weight percent and isohexane present in an amount from about 2 to about 45 weight percent and having a boiling point of 13.5.degree..+-.1.degree. C. at 744 mm Hg.
Dependencies are inferred from the claim text.