MAGNETIC RECORDING MEDIUM COMPRISING BINDER THAT MAY BE CURED USING BOTH ISOCYANATE AND RADIATION CURING TECHNIQUES

摘要

A magnetic recording medium comprising a magnetizable layer provided on a nonmagnetizable support. The magnetizable layer comprises a magnetic pigment dispersed in a cured binder. The cured binder is derived from binder materials comprising: (a) a first polymer having a Tg of about 60 DEG C or more, wherein said first polymer comprises a plurality of isocyanate crosslinkable hydroxy groups and a plurality of radiation crosslinkable groups; and (b) a second polymer having a Tg of about 25 DEG C or less, wherein said second polymer comprises a plurality of isocyanate cross-linkable hydroxy groups and a plurality of radiation crosslinkable curable groups, wherein the weight ratio of the second polymer to the first polymer is in the range from 1:19 to 19:1.