Magnetorheological fluids and methods of making thereof

Details Magnetorheological fluids and methods of making thereof Magnetorheological fluids and methods of making thereof

1995-06-07

1996-06-11

Willis, Jr., Prince

Compositions

Magnetic

Iron-oxygen compound containing

252 6252, 252 6254, 252 6251R, 428403, 428900, 428611, H01F 144, B32B 1501

Patent

active

055252494

ABSTRACT:
A magnetorheological fluid composition comprising magnetosolid particles, magnetosoft particles, a stabilizer, and a carrying fluid comprising an aromatic alcohol, a vinyl ester, and an organic solvent or diluent carrier such as kerosene, in proportions sufficient to provide substantially no agglomeration or sedimentation of magnetic particles over temperatures of from about -50.degree. to 120.degree. C. The composition can be made by preparing a carrying fluid comprising a vinyl ester, an aromatic alcohol and kerosene; preparing a first carrying fluid composition comprising magnetosoft particles, a stabilizer and a first sample of the carrying fluid; preparing a second carrying fluid composition comprising magnetosolid particles and a second sample of the carrying fluid; and admixing the first carrying fluid composition and the second carrying fluid composition.

REFERENCES:
patent: Re32573 (1988-01-01), Furumura et al.
patent: 2020714 (1935-12-01), Wulff et al.
patent: 3897350 (1975-07-01), Heiba et al.
patent: 4992190 (1991-02-01), Shtarkman

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