Low-vapor-pressure ferrofluids and method of making same

Details Low-vapor-pressure ferrofluids and method of making same Low-vapor-pressure ferrofluids and method of making same

1981-02-13

1982-02-16

Edmundson, F.

Compositions

Magnetic

Chromium or chromium compound containing

252 6252, H01F 1010

Patent

active

043158277

ABSTRACT:
A stable ferrofluid composition which comprises a colloidal dispersion of finely-divided magnetic particles in a liquid, low-pressure, polyphenyl ether carrier and a dispersing amount of a surfactant, which surfactant comprises a polyphenyl ether surfactant containing a functional group, such as an acidic group, and an aromatic tail group which is soluble in the polyphenyl ether carrier, to provide a stable ferrofluid composition.

REFERENCES:
patent: 3247245 (1966-04-01), Teot et al.
patent: 3620589 (1971-11-01), Rosensweig
patent: 3700595 (1972-10-01), Kaiser
patent: 3764540 (1973-10-01), Khalafalla et al.
patent: 3917538 (1975-11-01), Rosensweig
patent: 4019994 (1977-04-01), Kelley
Chopey, Chemical Engineering, vol. 67, No. 9, pp. 77, 78, May 1960.

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