Carboxylic acid functional polyurethane polymers and blends thereof used in magnetic recording media
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United States of America Patent
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Issued Date -
Mar 6, 2003
app pub date -
Apr 8, 2002
filing date -
Dec 21, 1995
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Abstract
The invention provides novel macromonomer and carboxyl functional polyurethanes having a high carboxyl content. The invention further provides dispersions, coatings and magnetic recording media comprising these polyurethanes, or blends or copolymers of these polyurethanes with quaternary ammonium compounds. The invention further provides novel dispersions, coatings and magnetic recording media comprising combinations of carboxyl functional polyurethanes having a high carboxyl content with quaternary ammonium polymers.
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