ELECTRORHEOLOGICAL FLUID AND ITS PRODUCTION

Japanese Patent JP3920957

B2

PROBLEM TO BE SOLVED: To prepare an electrorheological fluid which undergoes a sufficiently large change in viscosity upon the application of a voltage and has a disperse phase having a density low enough to prevent the phase from settlement even after long-term storage.
SOLUTION: This fluid consists of an electrical insulation liquid and inorganic/organic hybrid particles dispersed therein and prepared by substituting a skeleton of an inorganic polymer comprising M-O-M bonds (wherein M is a metal or a semi-metal) with O-[-Si-(R)2-O-]n groups (wherein R is an organic group). The amount of the particles added is 5-60vol.%. This fluid can be produced by dissolving a metal alkoxide and a hydroxyl-terminated polysiloxane in an organic solvent, hydrolyzing the metal alkoxide by the addition of water in an amount of 2-50mol, per mol of the alkoxyl groups, separating the precipitated particles and dispersing these particles in an electrical insulation liquid.

Shingo Katayama
Noriko Yamada
Ikuko Yoshinaga

JP29410396A

May 30, 2007

November 06, 1996

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Nippon Steel Corporation

C10M107/50; C10M155/02; C10M125/10; C10M125/26; C10M159/12; C10M177/00; C08G77/38; C08G77/398; C08G77/42; C08G79/00; C10M129/06; C10N20/00; C10N20/04; C10N20/06; C10N30/00; C10N40/14; F16D35/00; (IPC1-7): C10M107/50; //C10N40:14

JP4120196A
JP7278311A
JP8134485A
JP8127790A
JP8245975A
JP9268383A

Tomoyuki Yabuki
Tsugeko Shigeo

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