Title:
MAGNETIC VISCOELASTIC FLUID AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/110812
Kind Code:
A1
Abstract:
Provided is a magnetic viscoelastic fluid having superior long-term dispersion stability of magnetic particles and having a large maximum change amount of yield stress under a condition in which a magnetic field is applied. Provided is a device having superior long-term stable drivability and mechanism reliability. The magnetic viscoelastic fluid comprises magnetic particles, resin particles, and a dispersion medium. The ratio of the mass of the magnetic particles to the total mass of the magnetic viscoelastic fluid is 35 to 95% by mass. The ratio of the mass of the resin particles to the total mass of the magnetic viscoelastic fluid is 0.3 to 20% by mass. The mean particle diameter of the resin particles is 20 to 1500 nm. The magnetic viscoelastic fluid is used in the device.
Inventors:
SAKAMOTO HIROYUKI (JP)
Application Number:
PCT/JP2019/045142
Publication Date:
June 04, 2020
Filing Date:
November 18, 2019
Export Citation:
Assignee:
NIPPON PAINT HOLDINGS CO LTD (JP)
International Classes:
F16F9/53; H01F1/44
Domestic Patent References:
| WO2015152187A1 | 2015-10-08 |
Foreign References:
| JPS6285990A | 1987-04-20 | |||
| JP3048962U | 1998-05-29 | |||
| JP2009282131A | 2009-12-03 | |||
| JP2007326183A | 2007-12-20 | |||
| JP2015069995A | 2015-04-13 | |||
| JP2005206624A | 2005-08-04 | |||
| JP2010024289A | 2010-02-04 | |||
| JP2009235351A | 2009-10-15 | |||
| JP2009114392A | 2009-05-28 | |||
| JPH0625567A | 1994-02-01 |
Other References:
See also references of EP 3889458A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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