Method of preparing low viscosity, electrically conductive ferro

Details Method of preparing low viscosity, electrically conductive ferro Method of preparing low viscosity, electrically conductive ferro

1987-05-26

1988-03-22

Barr, Josephine

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

252503, 252504, 252506, 252516, 252519, 252 6251, 252 6255, 252 6256, 252513, H01B 106

Patent

active

047327065

ABSTRACT:
A low viscosity, electrically conductive ferrofluid composition and method of making and using same, which composition comprises: a first polar liquid carrier; a second polar liquid carrier miscible in the first polar carrier and comprising a polyol, such as a tetraethylene glycol dimethyl ether; magnetic particles to impart magnetic characteristics to the ferrofluid composition; and a surfactant, particularly a cationic surfactant in an amount sufficient to stabilize and disperse the magnetic particles, the surfactant dissociated or ionized predominately by the second polar liquid carrier.

REFERENCES:
patent: 3764540 (1973-10-01), Khalafalla et al.
patent: 4430239 (1984-02-01), Wyman
patent: 4469624 (1984-09-01), Ueda et al.
patent: 4604229 (1986-08-01), Roy et al.
patent: 4687596 (1987-08-01), Borduz et al.

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