Process of making magnetic recording medium

Details Process of making magnetic recording medium Process of making magnetic recording medium

1983-02-28

1983-11-15

Pianalto, Bernard D.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

427 44, 427127, 427128, 427216, 427221, 4273855, 4273881, 428457, 428500, 428522, 428694, 428900, B32B 516, H01F 1002

Patent

active

044156308

ABSTRACT:
A magnetic recording medium comprises a substrate and a magnetic recording layer formed thereon and which is made of a magnetic coating material consisting essentially of a magnetic powder dispersed in a binder, the coating material containing a titanium coupling agent. The magnetic powder is coated with the coupling agent or is mixed with the agent and then dispersed in the binder. The binder is prepared by mixing and plasticizing a radiation-sensitive modified resin with a radiation-sensitive soft resin and subjecting the mixture to radiation cross-linking and polymerization. Process for producing the medium comprises coating the magnetic particles with the titanium coupling agent, blending the coated particles with the binder to form a magnetic coating material, and then applying the material to the substrate. Alternatively, the process comprises mixing the titanium coupling agent with the magnetic particles, blending the mixture with the binder, and then applying the resulting coating material to the substrate. The titanium coupling agent is used in an amount of 0.5-7 wt %, preferably 0.5-3 wt %, based on the weight of the magnetic powder.

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