Magnetic recording substance

G - Physics – 11 – B

Patent

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117/24

G11B 5/70 (2006.01) B22F 9/24 (2006.01) G11B 5/842 (2006.01)

Patent

CA 1071478

ABSTRACT OF THE DISCLOSURE This invention relates to a magnetic recording sub- stance comprising a support and a magnetic layer containing a ferromagnetic metal powder of liquid phase reduction type in a binder, the ferromagnetic metal powder being obtaining by mixing an aqueous slurry containing the ferromagnetic metal powder with an organic solvent capable of forming a minimum azeotropic mixture with water and subjecting the mixture to distillation to remove the water. The invention also provides a novel process for the production of the magnetic recording substance. The substance has shown excellent dispersibility, surface and magnetic properties, and improved ferromagnetic properties.

243516

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