Title:
CARBONACEOUS POWDER FOR DISPERSE PHASE OF ELECTROVISCOUS FLUID AND ELECTROVISCOUS FLUID
Document Type and Number:
Japanese Patent JP3458148
Kind Code:
B2
Abstract:
PURPOSE: To obtain carbonaceous powder which can give an electroviscous fluid of reduced electric consumption when used as the disperse phase of the fluid.
CONSTITUTION: This powder is prepared by adding a cross-linking agent to a thermoplastic pitch obtained by polymerizing a fused polycyclic aromatic hydrocarbon based on naphthalene in the presence of a Lewis acid, heating the mixture to render the pitch thermosetting, and optionally heat-treating the same to adjust the ratio of the number of the carbon atoms to that of the hydrogen atoms (C/H) to 1.5-3.5 and adjust the mean particle diameter to 0.01-50μm. The electroviscous fluid comprises 1-60vol.% disperse phase comprising this powder and 40-99vo.% liquid phase comprising an electrical insulating oil having a viscosity of 0.65-1000cSt at room temperature.
Inventors:
Takayuki Maruyama
Takao Ogino
Tsubasa Saito
Sea Howard
Mari Miyano
Takao Ogino
Tsubasa Saito
Sea Howard
Mari Miyano
Application Number:
JP17038794A
Publication Date:
October 20, 2003
Filing Date:
June 30, 1994
Export Citation:
Assignee:
Bridgestone Corporation
International Classes:
C01B31/02; C10C3/02; C10M125/02; C10M169/04; C10M177/00; C10N20/00; C10N20/02; C10N20/06; C10N30/00; C10N40/14; C10N60/00; C10N60/10; C10N70/00; (IPC1-7): C10M125/02; C10M169/04; C10M177/00
Domestic Patent References:
| JP55099A | ||||
| JP4211499A | ||||
| JP3124794A | ||||
| JP6158082A | ||||
| JP3279206A | ||||
| JP3223391A | ||||
| JP5117634A |
Attorney, Agent or Firm:
Shoji Aoma
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