Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-04-21

1988-10-04

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 427128, 428447, 428694, 428695, 428900, G11B 5702

Patent

active

047755954

ABSTRACT:
In a magnetic recording medium such as VTR tape, a magnetic layer coated on a non-magnetic substrate comprises a binder of polyurethane resin of a reaction products among etheralcohol, polyesterpolyol, diisocyanate compound and silicon compound represented by the following general formula: ##STR1## (R: alkyl group, n: 1 or larger integer) and ferromagnetic powder dispersed in said binder; and the recording medium has very low friction coefficient, high C/N value and high durability without increase of amount of conventional lubricant or anti-abrasion agent in the magnetic layer.

REFERENCES:
patent: 4171406 (1979-10-01), Yamaguchi et al.
patent: 4349608 (1982-09-01), Shimizu
patent: 4434210 (1984-02-01), Nakajima
patent: 4501800 (1985-02-01), Fujiki et al.
patent: 4501801 (1985-02-01), Kimura et al.
patent: 4555443 (1985-11-01), Kikugawa
patent: 4556604 (1985-12-01), Ohbayashi et al.
patent: 4579780 (1986-04-01), Shinomiya et al.
patent: 4677030 (1987-06-01), Gerum

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