Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1992-08-05

1995-02-07

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428329, 428336, 4284233, 4284235, 4284237, 4284246, 4284259, 4284752, 4284763, 428483, 428522, 428694BU, 428694BS, 428694BM, 428900, G11B 500

Patent

active

053874641

ABSTRACT:
A magnetic recording medium is disclosed, comprising a non-magnetic support with an undercoating layer having formed thereon one or more magnetic layers. The undercoating layer contains a polyester resin or polyurethane resin having at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM, and --OPO.sub.3 M.sub.2 (wherein M represents a hydrogen atom, an alkali metal, or an ammonium base, and M in different polar group or plural M's within the same polar group may be the same or different), and a glass transition temperature (Tg) of from 40.degree. C. to 80.degree. C. The magnetic layer contains a binder resin having at least one polar group selected from the same group as defined above. The recording medium has excellent adhesion between the non-magnetic support and the magnetic layer, high running durability and excellent electromagnetic characteristics.

REFERENCES:
patent: 4411953 (1983-10-01), Miyoshi et al.
patent: 4504542 (1985-03-01), Miyoshi et al.
patent: 4839225 (1989-06-01), Matsufuji et al.
patent: 4963433 (1990-10-01), Ogawa et al.
patent: 5055352 (1991-10-01), Yamada et al.
patent: 5156908 (1992-10-01), Araki et al.

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