Electrorheological fluids containing particles of a polar...

Details Electrorheological fluids containing particles of a polar... Electrorheological fluids containing particles of a polar...

C - Chemistry, Metallurgy

10

M

C10M 171/00 (2006.01) C10M 167/00 (2006.01)

Patent

CA 2156020

An electrorheological fluid is prepared from a hydrophobic liquid me- dium and a dispersed particulate phase of (i) a polar solid material which is capable of exhibiting electrorheological activity in the presence of a low mo- lecular weight polar material and (ii) a non-cellulosic polymeric material having a solubility parameter of about 15 to about 50 (MPa)1/2 and exhibiting substan- tially no electrorheological activity in the absence of a low molecular weight polar material. The fluid optionally contains a low molecular weight polar activator. The fluid has good electrorheological performance over a broad temperature range.

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