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US 12,553,007 B2Granted
Magnetic viscous fluid and mechanical device
AssigneeSomar Corporation
InventorsHirohisa Ishizaki, Akira Ochiai
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Abstract
The present invention provides a magnetic viscous fluid comprising a magnetic particle, base oil, an inorganic cation exchanger with a siloxane bond, and silicone oil. A difference A−B between a solubility parameter A of the base oil and a solubility parameter B of the silicone oil is 1.3 (cal/cm3)1/2 or more.
Claims4
A magnetic viscous fluid comprising a magnetic particle, base oil, an inorganic cation exchanger with a siloxane bond, and silicone oil,
- wherein the base oil is at least one selected from ester base synthetic oil, ether base synthetic oil, and alkylnaphthalene,
- the ester base synthetic oil is at least one selected from polyol ester and dibasic acid ester,
- the ether base synthetic oil is polyalkylene glycols,
- a difference A-B between a solubility parameter A of the base oil and a solubility parameter B of the silicone oil is 1.3 (cal/cm3)1/2 or more,
- the mixing ratio of the inorganic cation exchanger with a siloxane bond and the silicone oil is in the range of 2:8 to 8:2 by mass, and
- the inorganic cation exchanger with a siloxane bond is at least one selected from zeolite, bentonite, montmorillonite, bidelite, nontronite, hectorite, stevensite and kaolinite.
3 more elements
Dependencies are inferred from the claim text.