Solid additives dispersed in perfluorinated liquids with perfluoroalkyl ether dispersants
Abstract
Abstract STABLE DISPERSIONS OF A WIDE VARIETY OF SOILDS, E.G. MAGNETITE, SILICA, CARBON BLACK, GRAPHITE, AND THE LIKE, ARE PROVIDED IN PERFLUORINATED LIQUIDS. THE COLLODIS PROVIDED BY THE PRESENT INVENTION CAN BE UTILIZED IN THE SAME FASHION AS HYDROCARBON BASED COLLOIDAL DISPERSIONS, AND ADDITIONALLY, BECAUSE OF THE PARTICULAR CHARACTERISTICS OF THE CARRIER MEDIUM, HAVE THE ADDITIONAL ADVANTAGES OF IMMISCIBILITY WITH BOTH HYDROCARBON AND AQUEOUS MEDIA, THUS, THE FERROFLUIDS FORMED BY DISPERSING MAGNETIC PARTICLES IN ACCORDANCE WITH THE PRESENT INBENTION ARE PAR TICULARLY USEFUL AS SEAL FLUIDS. THEY CAN BE POSITIONED IN SPACE BY A MAGNETIC FIELD. THE STABLE FISPERSIONS ARE FORMED BY DISPERSING FINELY DIVIDED SOILDS OF UP TO ABOUT ONE MICRON IN THE PRESENCE OF A PERFLUORINATED LIQUID, SUCH AS FREON E OR KRYTOX OIL AND A SURFACTANT HAVING THE FOLLOWING: F-(CF(-CF3)-CF2-O)N-CF(-CF3)-COOH WHERE N IS AN INTEGER OF FROM 3 TO 50.
Inventors
- 👤 R Kaiser
Bibliographic Details
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