Cleaning or drying compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane
AssigneeElf Atochem S. A.
InventorsPascal Michaud, Jean-Jacques Martin
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Abstract
In order to replace compositions based on CFC or on HCFC in applications for cleaning or drying solid surfaces (in particular defluxing), the invention proposes azeotropic or virtually azeotropic compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane, methylene chloride and optionally methanol.
Claims7
Azeotropic or virtually azeotropic composition consisting of, on a weight basis, 40 to 60% of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 60 to 40% of methylene chloride and 0 to 10% of methanol and optionally at least one stabilizer or hydrophobic surfactant wherein said composition boils at 34.2.degree. C. at atmospheric pressure.
Azeotropic or virtually azeotropic composition consisting of, on a weight basis, 30 to 69% of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 69 to 30% of methylene chloride and 1 to 10% methanol and optionally at least one stabilizer or hydrophobic surfactant wherein said composition boils at 33.2.degree. C. at atmospheric pressure.
Dependencies are inferred from the claim text.