Magnetic coating compositions

Details Magnetic coating compositions Magnetic coating compositions

1976-12-22

1978-05-30

Edmundson, F.C.

Compositions

Magnetic

With wax, bitumen, resin, or gum

H01F 128, G11B 570, C04B 3500

Patent

active

040922561

ABSTRACT:
A coating composition for use in the preparation of magnetic recording media is described. The composition contains finely divided magnetic particles dispersed in an organic solvent, containing in solution a hydroxyl group containing polymer having an OH number between about 100-500, a polyether urethane elastomer, an aliphatic polyisocyanate and a copper containing chelate catalyst, the organic portion of said chelate being of the general chemical structure ##STR1## wherein R and R' can be the same or different and represent alkyl groups containing 1-18 carbon atoms and aromatic groups, both substituted and unsubstituted.

REFERENCES:
patent: 3470021 (1969-09-01), Hendricx et al.
patent: 3926826 (1975-12-01), Graham et al.
patent: 3929658 (1975-12-01), Beske
patent: 4020236 (1977-04-01), Aonuma et al.
patent: 4025694 (1977-05-01), Pletcher et al.

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