Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-10-10

1987-12-08

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 427128, 427130, 428522, 428694, 428900, G11B 5702

Patent

active

047118199

ABSTRACT:
In a magnetic recording medium such as video tape, audio tape and computer tape, comprising a non-magnetic support and a magnetic recording layer coated thereon in which a ferromagnetic powder is dispersed, the feature consists in that the binder contains a polyisocyanate and at least one isocyanate reaction accelerating compound selected from the group consisting of (1) tertiary amine compounds, (2) tin compounds, (3) organometallic compounds except tin compounds, (4) amphoteric ion compounds and (5) organic acids. The stability and abrasion resistance are largely improved.

REFERENCES:
patent: 3804810 (1974-04-01), Fryd
patent: 4154895 (1979-05-01), Ogawa
patent: 4284750 (1981-08-01), Amirsakis
patent: 4388376 (1983-06-01), Kubota
patent: 4409291 (1983-10-01), Ogawa
patent: 4420601 (1983-12-01), Kuroda
patent: 4444838 (1984-04-01), Yamada
patent: 4510203 (1985-04-01), Ogawa
patent: 4568613 (1986-02-01), Saito
patent: 4587170 (1986-05-01), Hanai

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