Minnesota Mining and Manufacturing Company

Imation Corporation

Ruth M Erkkila

Ramesh C Kumar

James G Carlson

Nelson T Rotto

Christopher Miles Evans

Colin F Norman

James A Greczyna

Philip I Mayo

William E Bottomley

A magnetic recording medium comprising a magnetic layer provided upon a major surface of a substrate, wherein the magnetic layer includes a magnetic pigment, and a polymeric binder system containing a polyurethane having (1) a plurality of pendant phosphonate ester groups effective for promoting wetting of the magnetic pigment by the polymeric binder system, and (2) at least one quaternary ammonium group effective for promoting wetting of the magnetic pigment by the polymeric binder system.

Magnetic recording medium having a binder system including a

A polymeric binder system useful for a magnetic recording medium, the polymeric binder system and comprising a hard resin component comprising a nonhalogenated vinyl copolymer and a soft resin component comprising a polyurethane having a phosphonate diester group. The binder system is useful for preparing the magnetic layer and/or backside coating of magnetic recording media, in order to provide media that demonstrate an improved combination of such as modulus, Tg, and smoothness.

Binder system for magnetic media

Magnetic recording medium having a binder system including a non

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Lilydale, MN, United States of America

Ruth M Erkkila