Electrorheological semisolid

Details Electrorheological semisolid Electrorheological semisolid

1991-10-21

1994-10-04

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524496, 524588, 252 73, 252 74, 252 75, 252 783, C08J 300, C08K 304, C09K 500

Patent

active

053527186

ABSTRACT:
The present invention relates to an electrorheological semisolid capable of changing the rheological characteristics by an application of voltage. The semisolid is composed of 20-70 weight. Parts of carbonaceous particulates having an average particle size of 0.1-500 .mu.m and a carbon/hydrogen atomic ratio (C/H ratio) of 1.2-5 which are dispersed in 80-30 weight % of a dispersion medium comprising a partially crosslinked electric insulating polymer having a penetration of 40-475 at 25.degree. C., or into 80-30 weight % of a dispersion medium selected from an electric insulating oil having a viscosity of 5000 to 10.sup.9 centistokes at 25.degree. C. and an electric insulating polymer having a viscosity of 5000 to 10.sup.9 centistokes at 25.degree. C.

REFERENCES:
patent: 4020014 (1977-04-01), Service et al.
patent: 4588768 (1986-05-01), Streusand
patent: 4795592 (1989-01-01), Lander et al.
Yoshihito, O. et al., "Electrically Activated Mechanochemical Devices Using Polyelectrolyte Gels", Chemistry Letters, 1285-1288 (1985).
"Standard Test Method for Cone Penetration of Lubricating Grease Using One-Quarter and One-Half Scale Cone Equipment", ASTM, 720-727 (1984).

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