Stabilization of chromium dioxide magnetic pigments

Details Stabilization of chromium dioxide magnetic pigments Stabilization of chromium dioxide magnetic pigments

H - Electricity

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H01F 10/10 (2006.01) C09C 1/34 (2006.01) C09C 3/12 (2006.01) G11B 5/706 (2006.01)

Patent

CA 1079057

ABSTRACT OF THE DISCLOSURE: Chromium dioxide magnetic pig- ments can be stabilized against the loss of their magnetic properties by treating them, in alcoholic aqueous suspension, with a silane or a hydrolysis product thereof, so that when the pigment is isolated from the suspension medium the particles bear at least partially hydrolyzed silane on their surfaces, and then drying the magnetic pigment at from 50 to 200°C.

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