Magnetic fluid, method for producing it and magnetic seal means

Details Magnetic fluid, method for producing it and magnetic seal means Magnetic fluid, method for producing it and magnetic seal means

1989-05-31

1991-05-07

Straub, Gary P.

Compositions

Magnetic

Flaw detection or magnetic clutch

252 6251, H01F 128

Patent

active

050134710

ABSTRACT:
Disclosed herein are a magnetic fluid, a method for the production thereof, and a magnetic seal apparatus using the same, characterized in that the surfaces of ferromagnetic particles are covered with a monomolecular adsorbed film composed of a chloro-silane type surfactant, and the coated particles are dispersed in an oil. A magnetic seal apparatus using such a magnetic fluid.

REFERENCES:
patent: 4007313 (1977-02-01), Higuchi et al.
patent: 4076890 (1978-02-01), Yamada et al.
patent: 4356098 (1982-10-01), Chagnon

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