Electrorheological fluid and electric device
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsAkio INOUE, Tomoko KOZONO
Life of this patent
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Abstract
An electrorheological fluid which comprises a dispersion medium containing fluorine atoms in an amount larger than 0 wt % but not larger than 50.0 wt % and particles for electrorheological fluid use that are contained in the dispersion medium in an amount of 10-50 vol % of the total volume of the dispersion medium and the particles, the particles comprising a sulfonic-acid-group-containing polymer having a sulfonic acid group content of 30-70 wt %.
Claims15
An electric device comprised of an electrorheological fluid which is comprised of a dispersion medium in which particles for electrorheological fluid are contained and which is filled between a pair of electrodes, in which electric device,
- in a region of at least part of at least one surface of the surfaces of the pair of electrodes facing each other, an arithmetic mean roughness (Ra) is 0.5 μm or greater and less than 300 μm and a mean length (RSm) of roughness curve elements is 10 nm or greater and less than 100 μm.
Dependencies are inferred from the claim text.