Stock material or miscellaneous articles – Composite – Of polyamidoester
Patent
1991-05-23
1992-02-04
Thibodeau, Paul J.
Stock material or miscellaneous articles
Composite
Of polyamidoester
4284259, 428694, 428900, 252 6254, 528 71, G11B 2300
Patent
active
050859412
ABSTRACT:
The present invention concerns magnetic recording media comprising fine, magnetizable pigment or particles dispersed in a binder and supported on a substrate. The invention particularly concerns the nature of the binder. The binder comprises a sulfonated, hydroxy-functional polyurethane polymer having sulfonate and cross-linkable hydroxyl groups pendant from the polyurethane polymer backbone. The hydroxyl groups are pendant from the polyurethane polymer at locally hydrophobic sites. The binder also comprises a sulfonated, hydroxy-functional vinyl chloride copolymer having sulfonate and cross-linkable hydroxyl groups pendant from the vinyl chloride copolymer backbone.
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Griswold Gary L.
Kagan David B.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Resan Stevan A.
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