Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1991-11-04
1993-09-07
Thibodeau, Paul J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428403, 428412, 4284259, 428480, 428522, 428694B, 428900, 428694BG, 428694BN, 428694BA, 428694BP, G11B 500
Patent
active
052427528
ABSTRACT:
A magnetic recording medium having a support and provided thereon, a magnetic layer containing a ferromagnetic metal powder and a binder is disclosed. The ferromagnetic powder comprises an adsorbed moisture of not less than 1.0 weight % and not more than 2.5 weight % of said ferromagnetic metal powder, a pH value of not less than 9.0 and not morer than 11.5, and a specific surface area of not less than 45 m.sup.2 /g measured by a BET method; and the binder comprises at least one polar group selected from the group consisting of: ##STR1## wherein M represents an atom selected from the group consisting of hydrogen, lithium, sodium, and potassium; and M.sup.1 and M.sup.2 represent atoms of hydrogen, lithium, sodium and potassium, and an alkyl group, provided that M.sup.1 and M.sup.2 may be same with or different from each other.
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Isobe Ryosuke
Itozawa Kenji
Koyama Noboru
Mori Takahiro
Bierman Jordan B.
Konica Corporation
Resan Stevan A.
Thibodeau Paul J.
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