Electroviscous liquids

Details Electroviscous liquids Electroviscous liquids

1985-07-09

1987-02-24

Wax, Robert A.

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 783, 25217415, 252309, 252357, 2523635, 252573, 528 38, 528 41, 528 28, 556425, 556442, C09K 300

Patent

active

046456147

ABSTRACT:
The electroviscous suspension is based on a mixture of aqueous silica gel with silicone oil as the liquid phase to which a dispersant is added. The dispersant consists of amino functional or silicon-functional polysiloxanes having a molecular weight above 800. The concentration of the dispersant is from 1 to 30% by weight and preferably from 5 to 20% by weight, based on the silica gel particles. Electroviscous suspensions such as these are distinguished by the fact that they are highly compatible with elastomeric materials, non-sedimenting, non-inflammable and physiologically acceptable. In addition, they are heat- and freeze-resistant over a wide temperature range and are largely unaffected by temperature and pressure in their viscosity.

REFERENCES:
patent: 2928858 (1960-03-01), Morehouse
patent: 3047507 (1962-07-01), Winslow
patent: 3970573 (1976-07-01), Westhaver
patent: 3984339 (1976-10-01), Takeo et al.
patent: 4033892 (1977-07-01), Stangroom

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