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US 2008/0185554 A1Published application
Treated magnetizable particles and methods of making and using the same
AssigneeGM Global Technology Operations LLC
InventorsJohn C. Ulicny, Tao Xie, Mark A. Golden, Andrew M. Mance, Keith S. Snavely
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Abstract
Magnetizable particles treated with a silane precursor comprising a hydrophobic group.
Claims20
A method comprising:
- treating magnetizable particles with a silane precursor comprising a hydrophobic group.
A method comprising:
- applying a magnetic field to magnetorheological fluid comprising magnetizable particles and a silicate coating thereon comprising hydrophobic group to cause the viscosity of the fluid to increase.
A method comprising:
- hydrolyzing a silane;
- mixing magnetizable particles, the hydrolyzed silane and a solvent together for a sufficient time to produce coated particles comprising the magnetizable particles coated with a hydrophobic protective coating;
- condensing any hydroxyl groups on the coating;
- separating the coated particles from the solvent.
1 more element
A product comprising:
- a magnetorheological fluid comprising magnetizable particles and a silicate coating thereon comprising hydrophobic group.
Dependencies are inferred from the claim text.