Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1998-05-28
1999-08-03
Resan, Stevan A.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
4284259, 428532, 428694BG, 428624BU, 428694BL, 428694BF, 428694BP, 428900, G11B 5702
Patent
active
059323400
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), Heil et al.
Abe Yuko
Koizumi Takeshi
Kudo Hiroshi
Sawaguchi Masahiro
Suzuki Kazuhiko
Resan Stevan A.
Sony Corporation
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