Stable polysiloxane ferrofluid compositions and method of making

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

1997-02-12

1998-12-22

Bonner, Melissa

Compositions

Magnetic

Flaw detection or magnetic clutch

252 6254, 252 6253, H01F 144

Patent

active

058514163

ABSTRACT:
A ferrofluid composition comprising a colloidal dispersion of finely divided magnetic particles in a silicone oil carrier in which the surfaces of the magnetic particles are modified with (a) a first surfactant comprising a hydrocarbon having at least one polar group and (b) a second surfactant comprising a silicone oil surfactant having at least one polar group and which is soluble in the silicone oil carrier.

REFERENCES:
patent: 3764540 (1973-10-01), Khalafalla et al.
patent: 3917538 (1975-11-01), Rosensweig
patent: 4356098 (1982-10-01), Chagon
Database WPI, Section Ch, Week 9443, Derwent Publications Ltd., London, GB, XP002061311, *abstract*, Sep.1994.

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