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Title:
ELECTRO-RHEOLOGICAL FLUID AND CYLINDER DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2023/042829
Kind Code:
A1
Abstract:
An electro-rheological fluid, the electro-rheological fluid containing an insulating fluid and metal-ion-containing polyether-based polyurethane particles, the polyurethane particles including a chain extender, the metal ions including at least Li ions, and the ratio ([Li]/[O]) of the molar concentration ([O]) of oxygen atoms in ether groups included in the polyurethane particles and the molar concentration ([Li]) of the Li ions satisfying the following condition: (ratio of molar concentration ([Li]) of Li ions to molar concentration ([O]) of oxygen in ether groups) [Li]/[O]≥9.0×10–5.

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Inventors:
ISHII SATOSHI (JP)
SHIN SEOGCHUL (JP)
YAMAMOTO YUICHIRO (JP)
TAKAHASHI HITOMI (JP)
Application Number:
PCT/JP2022/034295
Publication Date:
March 23, 2023
Filing Date:
September 14, 2022
Export Citation:
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Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
C08L75/08; C08G18/00; C08G18/66; C10M149/14; F16F9/46; F16F9/53
Domestic Patent References:
WO2019035330A12019-02-21
WO2021015031A12021-01-28
WO2021161781A12021-08-19
WO2021161780A12021-08-19
WO2020218507A12020-10-29
WO2021246099A12021-12-09
WO2021246100A12021-12-09
Attorney, Agent or Firm:
YAMAMOTO, Osamu et al. (JP)
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