ELECTROVISCOUS FLUID

Title:

ELECTROVISCOUS FLUID

Document Type and Number:

WIPO Patent Application WO/1993/003124

Kind Code:

A1

Abstract:

An electroviscous fluid prepared by dispersing fine solid particles in an electrically insulating fluid. The fine solid particles have a specific gravity equal to, or greater than, that of the elctrically insulating fluid, and have a hydroxyl group on the surface thereof. The hydroxyl group is covalently bonded to a nonionic surfactant having a hydroxyl group and/or an -NH group as a hydrophilic group through a silane coupling agent, or polystyrene is covalently bonded thereto. The fluid is excellent in response, reproducibility, durability and thickening effect, particularly in dispersibility and shelf life stability, and can be utilized for electrical control of vibration control machines such as variable damping dampers, engine mounts, bearing dampers, clutches, valves, shock absorbers, precision equipment, acoustic instruments, etc., and for display devices.

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Inventors:

MIYAMOTO TETSUO (JP)
NAKANISHI HIROSHI (JP)
TOMIZAWA HIROTAKA (JP)

Application Number:

PCT/JP1992/000973

Publication Date:

February 18, 1993

Filing Date:

July 31, 1992

Export Citation:

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Assignee:

TONEN CORP (JP)

International Classes:

C10M171/00; (IPC1-7): C10M171/06; C10N40/14; C10N60/00

Foreign References:

JPH03119098A	1991-05-21
JPH03137196A	1991-06-11
JPH03162494A	1991-07-12
JPH03170600A	1991-07-24

Other References: