Magnetic paint and magnetic recording medium

Details Magnetic paint and magnetic recording medium Magnetic paint and magnetic recording medium

1992-04-03

1994-06-14

McAvoy, Ellen M.

Compositions

Magnetic

With wax, bitumen, resin, or gum

427128, 428409, 4284259, 428694, 428695, G11B 5702

Patent

active

053207696

ABSTRACT:
A magnetic paint and objects coated with same are disclosed, where the magnetic paint is characterized by comprising, as its essential components, a block copolymer and magnetic powder, said block copolymer having polyurethane and vinyl polymer segments. The magnetic paint of the present invention exhibits good dispersability of the magnetic powder, and good surface smoothness, durability, and wear resistance of the magnetic recording medium. Objects which may be appropriately coated with the magnetic paint of the present invention include high-quality magnetic recording media, such as magnetic tapes, magnetic cards, prepaid cards, magnetic disks and so on.

REFERENCES:
patent: 4286022 (1981-08-01), Vermillion
patent: 4784914 (1988-11-01), Matsufuji et al.
patent: 4798755 (1989-01-01), Yamada et al.
patent: 5034271 (1991-07-01), Miyoshi
patent: 5085941 (1992-02-01), Onkubo
patent: 5118580 (1992-06-01), Onkubo
patent: 5134035 (1992-07-01), Kumar et al.
patent: 5178953 (1993-01-01), Anglin

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