Compositions – Heat-exchange – low-freezing or pour point – or high boiling... – Organic components
Patent
1986-04-24
1987-05-26
Wax, Robert A.
Compositions
Heat-exchange, low-freezing or pour point, or high boiling...
Organic components
252 74, 252 77, C10M12526, C10M14910
Patent
active
046684174
ABSTRACT:
An electroviscous fluid comprising more than 25% by weight of silica gel with a water content of 1 to 15% by weight, a non-conductive oily phase dispersion medium, 1 to 30% by weight of one or more polymers soluble in the dispersion medium, the weight percentage being based on the water-containing silica gel, and the polymers having a molecular weight in the range of from 5.times.10.sup.3 to 10.sup.6 and containing 0.1 to 10% by weight of N and/or OH and 25 to 83% by weight of C.sub.4 to C.sub.24 -alkyl groups. Such electroviscous fluids are useful for transmitting powerful forces by means of a low electronic output, for example, in hydraulic valves and shock absorbers.
REFERENCES:
patent: 3047507 (1962-07-01), Winslow
patent: 3397147 (1968-08-01), Martinek
patent: 3970573 (1976-07-01), Westhaver
Shulman et al., "Rheological Transformers", Elektroreol.: Issled. Prilozh., 1981, 3-26, (CA 98:109679c).
Goossens John
H/a/ rtel Volker
Oppermann G/u/ nter
Podszun Wolfgang
Bayer Aktiengesellschaft
Metzeler Kautschuk GmbH
Wax Robert A.
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