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US 7,803,284 B2Granted
Heat transfer fluids
AssigneeSolvay Solexis S.p.A.
InventorsSilvia Petricci, Pier Antonio Guarda, Giuseppe Marchionni
Life of this patent
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Abstract
Heat transfer fluids are used in the presence of metals and/or Lewis acids of mixtures. The heat transfer fluids comprise (A) hydrofluoroethers and/or hydrofluoropolyethers, liquid under the environmental conditions (25° C., 1 atm); and (B) a compound having a fluoropolyether structure having end groups selected from the pyridine, amine, and aryl classes. The heat transfer fluids have a number average molecular weight of between 400 and 10,000.
Claims20
A method of using heat transfer fluids in the presence of metals and/or Lewis acids of mixtures, the method comprising the step of:
- adding a heat transfer fluid in the presence of metals and/or Lewis acids of mixtures,
- wherein the heat transfer fluid comprises:
- component (A) hydrofluoroethers and/or hydrofluoropolyethers, liquid under environmental conditions (25° C., 1 atm) having a number average molecular weight in the range 120-5,000;
- and
- component (B) a compound having a fluoropolyether structure comprising one or more repeating units selected from the group consisting of (CFXO), (CF2CF2O), (CF2CF2CF2O), (CF2CF2CF2CF2O), (CR5R6CF2CF2O), (CF(CF3)CF2O), and (CF2CF(CF3)O), wherein X=F, CF3;
- R5 and R6, equal to or different from each other, are selected from the group consisting of H, Cl, and perfluoroalkyl from 1 to 4 carbon atoms;
- and having end groups selected from the group consisting of pyridine, amine, aryl classes and having a number average molecular weight in the range 400-10,000.
4 more elements
Dependencies are inferred from the claim text.