Electroviscous fluid

Details Electroviscous fluid Electroviscous fluid

C - Chemistry, Metallurgy

10

M

C10M 113/12 (2006.01) C10M 171/00 (2006.01)

Patent

CA 2054433

ELECTROVISCOUS FLUID ABSTRACT The present invention relates to an electroviscous fluid which comprises a dispersion of 0.1 to SO weight% of wet- method silica particles whose surface adsorbed water has been replaced by an organic compound having in its molecule at least one group selected from the group consisting of a nitrile group, hydroxyl group, and acid group, in an electrically insulating fluid. The wet-method silica particles haave an average particle diameter of 10 to 500 micrometers and a pH that does not exceed 6.5. This electroviscous fluid provides a substantial increase in yield value at low voltages and an excellent shear stability.

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