Magnetic recording media

Details Magnetic recording media Magnetic recording media

1981-01-16

1982-05-04

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

360134, 427128, 252 6254, 4284237, 428480, 428692, 428694, 428900, H01F 1002

Patent

active

043282822

ABSTRACT:
Magnetic recording media comprising a non-magnetic base and, applied thereto, one or more magnetizable layers based on an anisotropic magnetic material finely dispersed in an organic binder containing an ionomeric polyurethane elastomer, wherein the binder used is a substantially aqueous polyurethane dispersion prepared from a polyurethane solution which has been obtained by reacting a polyisocyanate with an organic polyhydroxy compound in the presence of an organic solvent that is inert to isocyanate groups.

REFERENCES:
patent: 3124605 (1964-03-01), Wagner
patent: 3836492 (1974-09-01), Watanabe
patent: 4066820 (1978-01-01), Kelly

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