Compositions comprising a fluoro ether and use of these compositions
AssigneeSolvay (Societe Anonyme)
InventorsPierre Barthelemy, Mireille Paulus
Life of this patent
Estimating the term…
Abstract
The invention relates to azeotropic and pseudoazeotropic compositions comprising difluoromethoxy-2,2,2-trifluoroethane with 2,2-dichloro-1,1,1-trifluoroethane or with 1,1-dichloro-1-fluoroethane. These compositions can be employed as solvents, especially for cleaning electronic components and for degreasing metals, as blowing agents, especially for the preparation of polyurethane foams, or as refrigerants.
Claims11
A virtually constant boiling point composition consisting essentially of a binary mixture of approximately 5 to 95% by weight of difluoromethoxy-2,2,2-trifluoroethane and of 95 to 5% by weight of one compound selected from the group consisting of 2,2-dichloro-1,1,1-trifluoroethane and 1,1-dichloro-1-fluoroethane, said composition having a boiling point at atmospheric pressure of approximately 26.7.degree..+-.0.7.degree. C. when the compound is 2,2-dichloro-1,1,1-trifluoroethane and of 28.5.degree..+-.1.degree. C. when the compound is 1,1-dichloro-1-fluoroethane.
Dependencies are inferred from the claim text.