Magnetic recording medium and a process for producing the same

Details Magnetic recording medium and a process for producing the same Magnetic recording medium and a process for producing the same

1999-01-22

2000-10-03

Resan, Stevan A.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428522, 428694BU, 428694BC, 428694BG, 428694BB, 428900, G11B 05738

Patent

active

061270393

ABSTRACT:
A magnetic recording medium comprising a non-magnetic base having on at least one side a non-magnetic layer (undercoat) containing electron beam-curable resins which in turn is over-laid with a magnetic layer (topcoat) containing an iron (Fe) based magnetic powder, said magnetic layer having a glass transition temperature (Tg) of at least 65.degree. C. and said non-magnetic layer being an electron beam cured coating that is formed by coating the non-magnetic base with a non-magnetic coating mix containing electron beam curable resins, the yet to be cured coating having a glass transition temperature (Tg) of 30-53.degree. C. and said electron beam curable resins comprising an electron beam curable vinyl chloride based resin having a sulfur-containing polar group and an electron beam curable urethane resin having a phosphorus-containing polar group. Also disclosed is a process for producing the magnetic recording medium, which has good electromagnetic conversion characteristics in a high-frequency range and which can be manufactured at high production rate.

REFERENCES:
patent: 5443913 (1995-08-01), Kohno et al.
patent: 5576075 (1996-11-01), Kawasaki et al.
patent: 5698286 (1997-12-01), Ikarashi et al.
patent: 5712028 (1998-01-01), Seki et al.

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