Magnetic recording medium

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Details

428537, 428694BN, 428694BG, 428694BF, G11B 5102

Patent

active

058009159

ABSTRACT:
A magnetic recording medium exhibiting not only good durability and traveling reliability but also improved static magnetic properties and electromagnetic transduction characteristics can be obtained according to the present invention. The magnetic recording medium includes a non-magnetic substrate and a magnetic layer composed of a magnetic powder, a binder and a lubricant, wherein the binder contains not less than 50% by weight of a polyester-polyurethane resin having a number-average molecular weight (Mn) of not greater than 15,000 and a ratio of a weight-average molecular weight (Mw) to the number-average molecular weight (Mn) of not smaller than 2.5.

REFERENCES:
patent: 4409300 (1983-10-01), Ohkawa et al.
patent: 4411956 (1983-10-01), Matsufuji et al.
patent: 4560456 (1985-12-01), Hell et al.

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