Magnetic coating composition

Details Magnetic coating composition Magnetic coating composition

1995-01-06

1996-07-02

Resan, Stevan A.

Compositions

Magnetic

With wax, bitumen, resin, or gum

428323, 4284259, 428694B, 428694BG, 428522, 428900, G11B 500

Patent

active

055319149

ABSTRACT:
This invention relates to coating compositions used for forming a magnetic layer on the surface of substrates to prepare magnetic recording media, e.g., recording tapes, of which the characteristic ingredient is a copolymeric resin. The copolymeric resin is a copolymer obtained by the copolymerization of comonomers in a specified proportion including (1) vinyl chloride, (2) vinyl acetate, and (3) an acrylate or methacrylate moiety having a sulfonic acid group or a metal or amine salt thereof. This copolymeric resin is advantageous in respect of imparting enhanced dispersion and magnetic property characteristics while also having desirable rheological characteristics and thermal stability.

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