EP 0483774 B1 19950215 - Electroviscous fluid.
Title (en)
Electroviscous fluid.
Title (de)
Elektroviskose-Flüssigkeit.
Title (fr)
Fluide électrovisqueux.
Publication
Application
Priority
JP 29101090 A 19901029
Abstract (en)
[origin: EP0483774A1] The present invention relates to an electroviscous fluid which comprises a dispersion of 0.1 to 50 weight% of wet- method silica particles whose surface adsorbed water has been replaced by an organic compound having in its molecule at least one group selected from the group consisting of a nitrile group, hydroxyl group, and acid group, in an electrically insulating fluid. The wet-method silica particles have an average particle diameter of 10 to 500 micrometers and a pH that does not exceed 6.5. This electroviscous fluid provides a substantial increase in yield value at low voltages and an excellent shear stability.
IPC 1-7
IPC 8 full level
C10M 169/04 (2006.01); C10M 171/00 (2006.01); F16D 35/00 (2006.01); C10N 20/06 (2006.01); C10N 40/14 (2006.01)
CPC (source: EP)
C10M 171/001 (2013.01)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0483774 A1 19920506; EP 0483774 B1 19950215; CA 2054433 A1 19920430; DE 69107406 D1 19950323; DE 69107406 T2 19950720; JP H04164996 A 19920610
DOCDB simple family (application)
EP 91118452 A 19911029; CA 2054433 A 19911029; DE 69107406 T 19911029; JP 29101090 A 19901029