EP 0395359 B1 19930922 - ELECTROVISCOUS ELECTRICALLY INSULATING FLUIDS
Title (en)
ELECTROVISCOUS ELECTRICALLY INSULATING FLUIDS
Publication
Application
Priority
JP 10699789 A 19890426
Abstract (en)
[origin: EP0395359A1] In an electrically insulating liquid medium there are mixed (a) 0.1 - 50 wt% of dispersed solid particles of size 10 nm - 200 mu m (e.g. silica gel), (b) 0.1 - 5 wt% of an acid, base or salt, (c) a polyhydric alcohol (e.g. ethylene glycol) and (d) an antioxidant (e.g. 0.01 - 10 wt% of a phenol or amine) which prevents oxidation of the liquid and the alcohol and/or a corrosion inhibitor (e.g. 0.001 - 10 wt% of a benzotriazole derivative or imidazole) which prevents corrosion of the electrode and generation of metallic ions. Optionally an agent to assist dispersing of the solid particles is included (e.g. a sulphonate or phosphonate). The resultant electroviscous fluid can have good effects, including responsiveness and reproducibility and durability when used at temperatures up to 100 DEG C and can be used in electrical control of mechanical devices by utilizing its viscosity change.
IPC 1-7
IPC 8 full level
C10M 129/10 (2006.01); C10M 129/14 (2006.01); C10M 133/12 (2006.01); C10M 133/34 (2006.01); C10M 133/38 (2006.01); C10M 133/40 (2006.01); C10M 133/44 (2006.01); C10M 133/46 (2006.01); C10M 135/20 (2006.01); C10M 135/26 (2006.01); C10M 135/28 (2006.01); C10M 135/36 (2006.01); C10M 171/00 (2006.01); C10N 30/10 (2006.01); C10N 30/12 (2006.01); C10N 40/14 (2006.01)
CPC (source: EP)
C10M 171/001 (2013.01)
Citation (examination)
US 2751352 A 19560619 - BONDI ARNOLD A
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0395359 A1 19901031; EP 0395359 B1 19930922; DE 69003434 D1 19931028; DE 69003434 T2 19940120; JP H02284992 A 19901122
DOCDB simple family (application)
EP 90304402 A 19900424; DE 69003434 T 19900424; JP 10699789 A 19890426