Magnetic recording medium comprising a polyester polyurethane po

Details Magnetic recording medium comprising a polyester polyurethane po Magnetic recording medium comprising a polyester polyurethane po

1990-02-14

1992-05-26

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428694, 428900, 252 6254, G11B 2300

Patent

active

051166852

ABSTRACT:
Compositions for magnetic recording media comprising a nonmagnetic support and a magnetic layer adhered to the nonmagnetic support, wherein the magnetic layer comprises a ferromagnetic substance and a binder system, preferably the binder system comprises primarily a polyester polyurethane polymer and small percentage amounts of a low molecular weight polyol crosslinked with a multifunctional isocyanate. Methods of formation of the compositions are also described. Presence of the low molecular weight polyol is particularly important in attaining desired performance characteristics in wound pile stability, layer-to-layer adhesion, and durability.

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