Non-settling glycol based magnetorheological fluids

Abstract

A magnetorheological fluid comprising magnetic-responsive particles, a thickener, an ionic thixotropic additive, and a carrier fluid wherein the carrier fluid comprises a glycol- water mixture comprising at least 50 percent by weight of a glycol compound. The thickener is preferably fumed silica and the ionic thixotropic additive is preferably one of sodium nitrite, sodium chloride, sodium acetate, and sodium benzoate.

Description

[0001] Cross references to related patent applications

[0002] Pursuant to U.S. Patent Law 35 U.S.C. §119(e), this patent application claims the title "NON-SETTLING GLYCOL BASED MAGNETORHEOLOGICAL FLUIDS" filed on August 1, 2007 Priority to US Provisional Patent Application No. 60 / 953,272, the contents of which are incorporated herein by reference. Background technique

[0003] Magneto-rheological fluid is a magnetic field-responsive fluid containing field-polarized particle components and liquid carrier components. Magnetorheological fluids can be used in devices or systems for controlling vibration and / or noise. Magnetorheological fluids have been proposed for controlling damping in various devices such as dampers, bumpers, and elastic mounts. Magnetorheological fluids have also been proposed for controlling pressure and / or torque in brakes, clutches and valves. Magnetorheological fluids are believed to be superior to electrorheological fluids in many applications becaus...

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