Stable ferrofluid compositions and method of making same

Details Stable ferrofluid compositions and method of making same Stable ferrofluid compositions and method of making same

1980-09-15

1982-10-26

Edmundson, F.

Compositions

Magnetic

Chromium or chromium compound containing

252 6253, 252 496, 252309, 252572, C09D 523, C10M 344

Patent

active

043560989

ABSTRACT:
A stable liquid composition which comprises a colloidal dispersion of finely-divided particles in a liquid silicone-oil carrier and a dispersing amount of a surfactant, which surfactant comprises a silicone-oil surfactant containing a functional group which forms a chemical bond with the surface of the particles and a tail group which is soluble in the silicone-oil carrier, to provide a stable ferrofluid composition.

REFERENCES:
patent: 3344066 (1967-09-01), Schiefer et al.
patent: 3531413 (1970-09-01), Rosensweig
patent: 3575858 (1971-04-01), Adair et al.
patent: 3700595 (1977-10-01), Kaiser
patent: 3843540 (1974-10-01), Reimers et al.
patent: 4011168 (1977-03-01), Uhlmann
Kaiser et al., IEEE Trans. on Magnitics, vol. Mag. 6, No. 3, pp. 694-698 (9/70).
Addendun, Tech. Rept. 1213, 4 pp., 5/9/49.

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