Magnetic recording media comprising a cured dispersion coating o

Details Magnetic recording media comprising a cured dispersion coating o Magnetic recording media comprising a cured dispersion coating o

1992-03-13

1993-09-14

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428694, 428900, 252 6254, G11B 500

Patent

active

052447391

ABSTRACT:
The invention relates to vinyl sulfonated and non-sulfonated hydroxy functional polyurethane copolymers prepared from macromonomer diols and their use in magnetic recording media. The sulfonated hydroxy functional copolymer comprises: a polyurethane backbone; at least one SO.sub.3 M group pendant from the polyurethane backbone, wherein the polyurethane backbone has an SO.sub.3 M equivalent weight of from about 2,000 to about 100,000, and wherein M is selected from the group consisting of H.sup.+, NR.sub.4.sup.+ wherein R can be H.sup.+ or an alkyl group, Li.sup.+, Na.sup.+, K.sup.+, and mixtures thereof; at least two crosslinkable hydroxy groups pendant from the polyurethane backbone, wherein the polyurethane backbone has a hydroxy equivalent weight of from about 500 to about 50,000; and at least one vinyl polymeric segment pendant from the polyurethane backbone.

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Annex to the European Search Report on European Patent Application No. EP 91 30 5590.

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