Magnetic fluid

Details Magnetic fluid Magnetic fluid

1985-07-30

1986-08-26

Demers, Arthur P.

Compositions

Magnetic

Flaw detection or magnetic clutch

252 6251, 252 6255, C09K 500

Patent

active

046081860

ABSTRACT:
A magnetic fluid comprising metal fine particles of cobalt, 25 to 60% based on the weight of the metal particles of a surface-active agent selected from the group consisting of polyglycerine fatty acid esters, sorbitan fatty acid esters, and mixtures thereof, and 50 to 250% based on the weight of the metal particles of a low boiling hydrocarbon medium exhibits remarkably high saturation magnetization.

REFERENCES:
patent: 3764540 (1973-10-01), Khalafalla et al.
patent: 3917538 (1975-11-01), Rosensweig
patent: 4315827 (1982-02-01), Bottenberg
patent: 4356098 (1982-10-01), Chagnon
patent: 4430239 (1984-02-01), Wyman
Mehta et al., J. Mag. & Mag Mat., 39 (1983) pp. 35-38.
Winkler, Chem. Abst., 86 (1977) #132462.
Ito et al., Chem. Abst., 87 (1977) #145014.

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