Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1982-02-25

1983-09-13

Pianalto, Bernard D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6254, 428329, 4284259, 428694, 428900, H01F 1002

Patent

active

044042531

ABSTRACT:
Magnetic recording medium using water as dispersion medium. The magnetic layer comprises as binder an aqueous dispersion of polyurethane having functional groups capable of salt formation and a magnetic pigment. The volumetric ratio of magnetic pigment to polyurethane in terms of solids content is in the range of 0.7:1 to 1.4:1.

REFERENCES:
patent: 3542505 (1970-11-01), Pittman
patent: 3725285 (1973-04-01), Denk et al.
patent: 4076861 (1978-02-01), Furukawa et al.
patent: 4096127 (1978-06-01), Schurmann et al.
patent: 4152485 (1979-05-01), Mizumura et al.
patent: 4263188 (1981-04-01), Hampton et al.

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