Magnetic recording medium containing ferromagnetic particles wit

Details Magnetic recording medium containing ferromagnetic particles wit Magnetic recording medium containing ferromagnetic particles wit

1990-02-28

1992-03-03

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428329, 428402, 428409, 4284246, 4284258, 4284259, 428694, 428900, G11B 500

Patent

active

050931911

ABSTRACT:
A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic particles and a binder containing a vinyl chloride polymer, wherein the crystallite size of the ferromagnetic particles is 250 angstrom or less, the vinyl chloride polymer is present in an amount of 20 to 50% by weight based on the binder, and an integrated intensity ratio, which is denoted by .alpha., of Cl-2P spectrum to Fe-2P (3/2) spectrum in the surface of the magnetic layer as measured by X-ray photoelectron spectroscopy is 0.20/1<.alpha.<0.42/1. The magnetic recording material exhibits excellent running property and durability and hardly causes head clogging.

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patent: 4851288 (1989-07-01), Ishikuro et al.
patent: 4863793 (1989-09-01), Ogawa et al.
patent: 4888212 (1989-12-01), Iida et al.
patent: 4904530 (1990-02-01), Huizing et al.
patent: 4959263 (1990-09-01), Aonuma et al.

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