Stabilized magnetorheological fluid compositions
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United States of America Patent
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Nov 21, 2000
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N/A
app pub date -
Oct 26, 1998
filing date -
Oct 26, 1998
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Abstract
Magnetorheological fluids containing carbonyl iron particles with surface hydroxyl groups and high specific surface area in combination with nonpolar vehicles such as polyalphaolefins and glycol esters can be formulated to resist particle separation under high separation force applications. When the nonpolar vehicle having a suitably high molecular weight is used, the fluids may be used at working temperatures of the order of 200.degree. C.
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