Method for preparing magnetic paint and magnetic recording...

Details Method for preparing magnetic paint and magnetic recording... Method for preparing magnetic paint and magnetic recording...

2011-07-19

2011-07-19

Koslow, C. Melissa (Department: 1734)

Compositions

Magnetic

With wax, bitumen, resin, or gum

C252S062530

Reexamination Certificate

active

07981310

ABSTRACT:
A magnetic paint is prepared by a method comprising a surface-treating step for magnetic powder, to obtain a first composition by mixing and stirring a composition which comprises a magnetic powder, a dispersant and/or a binder resin, and an organic solvent, and which contains 40% by weight or less of a non-solvent component, while applying a shear force to the composition; and a concentrating step to obtain a second composition by concentrating the first composition until the content of the non-solvent components of the first composition reaches 80% by weight or more.

REFERENCES:
patent: 4533565 (1985-08-01), Okita
patent: 5544817 (1996-08-01), Brownbridge et al.
patent: 2001-076340 (2001-03-01), None
patent: 2003-268404 (2003-09-01), None

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