Magnetic recording medium
AssigneeTDK Electronics Co., Ltd.
InventorsFujio Shibata, Kiyotaka Okuyama
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Abstract
A magnetic recording tape or disc which has excellent physical characteristics of adhesive strength, a repeated running durability, and a gloss degree of the surface as well as excellent electromagnetic characteristics. A binder of a magnetic paint coating comprises 30 to 70 wt. % of an urethane resin, 10 to 50 wt. % of an epoxy resin and 10 to 50 wt. % of nitrocellulose, and if necessary a curing agent.
Claims5
In a magnetic recording medium comprising a substrate and a magnetic paint coating which comprises a binder and a magnetic powder, the improvement characterized in that the binder in the magnetic paint comprises 30 to 70 wt.% of a urethane resin, 10 to 50 wt. % of a thermosetting epoxy resin characterized by its content of epoxide groups, and 10 to 50 wt.% of a nitrocellulose.
Dependencies are inferred from the claim text.