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1. WO2020110812 - MAGNETIC VISCOELASTIC FLUID AND DEVICE

Publication Number WO/2020/110812
Publication Date 04.06.2020
International Application No. PCT/JP2019/045142
International Filing Date 18.11.2019
IPC
F16F 9/53 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
9Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
32Details
53Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
H01F 1/44 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
44of magnetic liquids, e.g. ferrofluids
CPC
F16F 9/53
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
9Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
32Details
53Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
H01F 1/44
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
44of magnetic liquids, e.g. ferrofluids
Applicants
  • 日本ペイントホールディングス株式会社 NIPPON PAINT HOLDINGS CO., LTD. [JP]/[JP]
Inventors
  • 坂本 裕之 SAKAMOTO Hiroyuki
Agents
  • 杉村 憲司 SUGIMURA Kenji
Priority Data
2018-22045826.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) MAGNETIC VISCOELASTIC FLUID AND DEVICE
(FR) FLUIDE VISCOÉLASTIQUE MAGNÉTIQUE ET DISPOSITIF
(JA) 磁気粘弾性流体および装置
Abstract
(EN)
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.
(FR)
L'invention concerne un fluide viscoélastique magnétique ayant une stabilité de dispersion à long terme supérieure de particules magnétiques et ayant une grande quantité de variation maximale de limite d'écoulement dans une condition dans laquelle un champ magnétique est appliqué. L'invention concerne un dispositif ayant une manœuvrabilité et une fiabilité de mécanisme stables à long terme supérieures. Le fluide viscoélastique magnétique comprend des particules magnétiques, des particules de résine et un milieu de dispersion. Le rapport de la masse des particules magnétiques à la masse totale du fluide viscoélastique magnétique est de 35 à 95 % en masse. Le rapport de la masse des particules de résine à la masse totale du fluide viscoélastique magnétique est de 0,3 à 20 % en masse. Le diamètre de particules moyen des particules de résine est de 20 à 1500 nm. Le fluide viscoélastique magnétique est utilisé dans le dispositif.
(JA)
磁性粒子の長期間の分散安定性に優れ、磁場印加条件下での降伏応力の最大変化量が大きい磁気粘弾性流体を提供すること。長期間の安定駆動並びに機構信頼性に優れた装置を提供すること。磁性粒子と、樹脂粒子と、分散媒と、を含む磁気粘弾性流体であって、前記磁気粘弾性流体の合計質量に対する、前記磁性粒子の質量の割合が、35~95質量%であり、前記磁気粘弾性流体の合計質量に対する、前記樹脂粒子の質量の割合が、0.3~20質量%であり、前記樹脂粒子の平均粒子径が、20~1500nmである、磁気粘弾性流体。上記磁気粘弾性流体を用いた、装置。
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