Ferrofluid composition and method of making and using same

Details Ferrofluid composition and method of making and using same Ferrofluid composition and method of making and using same

1983-02-07

1984-02-07

Edmundson, F.

Compositions

Magnetic

Chromium or chromium compound containing

252 6252, 252 6253, H01F 1010

Patent

active

044302398

ABSTRACT:
A stable liquid composition which comprises a colloidal dispersion of finely-divided, magnetic particles in a liquid polar carrier and a dispersing amount of a surfactant, which surfactant comprises a phosphoric acid ester of a long-chain alcohol, the alcohol compatible with the polar carrier, to provide a stable ferrofluid composition.

REFERENCES:
patent: 3531413 (1970-09-01), Rosensweig
patent: 3700595 (1972-10-01), Kaiser
patent: 3764540 (1973-10-01), Khalafalla et al.
patent: 3843540 (1974-10-01), Reimers et al.
patent: 3917538 (1975-11-01), Rosensweig
patent: 4208294 (1980-06-01), Khalafalla et al.
patent: 4285801 (1981-08-01), Chiang
patent: 4315827 (1982-02-01), Bottenberg et al.
patent: 4333988 (1982-06-01), Yamada et al.

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