PURPOSE: To obtain an electroviscous fluid which undergoes a rapid reversible viscosity change according as the applied voltage and is stable over a long period of time by mixing a dispersion medium comprising an electrical insulating liquid with dispersoids comprising porous solid particles and a polyhydric alcohol.
CONSTITUTION: This electroviscous fluid consists of a dispersion medium comprising an electrical insulating liquid, dispersoids comprising porous solid particles and a polyhydric alcohol, and optionally a dispersant. As the electrical insulating liquid, a mineral oil and a synthetic lubricating oil may be used, and examples thereof including a naphthenic mineral oil, a paraffinic mineral oil, a polyalkylene glycol, a silicone, a phosphate, a fluorine compound, and a synthetic hydrocarbon. Examples of the porous solid particles include particles of silica gel, a water-containing resin, a diatomaceous earth, alumina, a zeolite, an ion exchange resin, and cellulose. Examples of the polyhydric alcohol include ethylene glycol, glycerin, and butanediol.
YOSHIMURA SHIGEHIKO
HIRANO HIROSHI
MITSUI JUNICHI
| JPH01278599A | 1989-11-08 | |||
| JPH01207396A | 1989-08-21 | |||
| JPH01207395A | 1989-08-21 | |||
| JPH01278598A | 1989-11-08 |