Coated magnetic recording medium, paint for coated magnetic medi

Details Coated magnetic recording medium, paint for coated magnetic medi Coated magnetic recording medium, paint for coated magnetic medi

1998-11-30

2000-02-29

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428323, 428336, 4284259, 428694BU, 428694BG, 428694BS, 428900, G11B 5702

Patent

active

060306955

ABSTRACT:
A coated magnetic recording medium includes a nonmagnetic support, a primer layer formed on the nonmagnetic support, and an upper magnetic layer formed on the primer layer. The primer layer and the upper magnetic layer contain, as a binder, a polyurethane resin and a polyvinyl chloride base resin, The weight ratio of the polyurethane resin to the polyvinyl chloride base resin in the primer layer is from 70:30 to 90:10, and the weight ratio of the polyurethane resin to the polyvinyl chloride base resin in the upper magnetic layer is from 20:80 to 40:60. A method for producing the coated magnetic recording medium is also described.

REFERENCES:
patent: 4265931 (1981-05-01), Tamai et al.
patent: 4857388 (1989-08-01), Ogawa et al.
patent: 5085941 (1992-02-01), Ohkubo
patent: 5840410 (1998-11-01), Oiri et al.

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