Magnetic fluid composition

Details Magnetic fluid composition Magnetic fluid composition

1994-01-05

1996-01-30

Willis, Jr., Prince

Compositions

Magnetic

Chromium or chromium compound containing

252 6252, 252 6255, 252 6256, 252 6259, 252 626, 252 6262, 252 6263, 252 6254, H01F 144

Patent

active

054878403

ABSTRACT:
A magnetic fluid composition comprising a low-volatile organic solvent as a carrier having dispersed therein ferromagnetic fine particles coated with a surface active agent having a lipophilic group having affinity to said low-volatile organic solvent, and a thixotropy-imparting agent is disclosed. The composition is prevented from splashing for an extended period of time even when used in a magnetic fluid-sealed apparatus operated at such a high speed that the rotational speed of the sealing part is 2 m/sec or higher.

REFERENCES:
patent: 4976883 (1990-12-01), Kanno et al.
patent: 4992190 (1991-02-01), Shtarkman
patent: 5085789 (1992-02-01), Yokouchi et al.
patent: 5135672 (1992-08-01), Yabe et al.
patent: 5143637 (1992-09-01), Yokouchi et al.
Kaiser et al., IEEE Transactions on Magnetics, Sep. 1970, vol. 6(3), pp. 694-698.
Mehta et al., Journal of Magnetism and Magnetic Materials, 1983, vol. 39, pp. 35-38. (Month Unknown).

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