| abstract |
【Theme】 Provided are electrorheological fluids and cylinder devices having high high temperature and high yield stress. SOLUTION: The electroviscous fluid of the present invention contains a fluid and polyurethane particles composed of isocyanate and polyol, and the polyurethane particles contain metal ions, and the equivalent ratio of isocyanates constituting the polyurethane particles is 0.95 or more. It is characterized by being 5 or less. [Selection diagram] Fig. 1 |