Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-06-18
1999-03-09
Hellner, Mark
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525454, 428692, 428694B, 428694BU, 528125, 528126, 528128, 528222, 528229, 528303, C08F28304
Patent
active
058802266
ABSTRACT:
A magnetic recording medium has a substrate and an non-magnetic underlayer formed on the substrate and a magnetic layer formed on the non-magnetic layer. The magnetic layer include a magnetic powder and a binder for binding the magnetic powder on the non-magnetic layer. The binder includes at least a resin component containing at least an aminoquinone structure selected from an aminoquinone structure group shown with formulas (1-1) and (1-2) as a constitutional unit. As the magnetic powder, a metal magnetic powder mainly made of Fe and having a saturation magnetization .sigma.s is used. The magnetic layer has a saturation flux density Bm of 3500 to 5000 G and a coercive force of 1800 to 3000 Oe and a surface roughness SRa of 1 to 10 nm and a thickness of not more than 1.0 .mu.m.
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patent: 5686136 (1997-11-01), Nikles et al.
IEEE Transactions of Magnetics (29)6, 3649-3651 (1993) "Amine-Quinone Polyurethanes . . . " Liang, J. et al.
Progress in Organic Coatings 15, 63--71 (1987) "A Novel Coating Based on . . . " Kaleem, K. et al.
J. Applied Science, 42-2893-2897 (1991), "Quinone-Amine Polymers V. Syntheses . . . " Nithianandam, V.S. et al.
Watanabe Kazuyoshi
Watanabe Noboru
Hellner Mark
Meller Michael N.
Victor Company of Japan Ltd.
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