Magnetic recording medium comprising binder that may be...

Details Magnetic recording medium comprising binder that may be... Magnetic recording medium comprising binder that may be...

G - Physics

11

B

G11B 5/706 (2006.01) G11B 5/702 (2006.01) G11B 5/735 (2006.01) G11B 5/704 (1990.01)

Patent

CA 2135484

2135484 9324924 PCTABS00028 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 ·C or more, wherein said first polymer comprises a plurality of isocyanate cross-linkable hydroxy groups and a plurality of radiation cross-linkable groups; and (b) a second polymer having a Tg of about 25 ·C or less, wherein said second polymer comprises a plurality of isocyanate cross-linkable hydroxy groups and a plurality of radiation cross-linkable curable groups, wherein the weight ratio of the second polymer to the first polymer is in the range from 1:19 to 19:1.

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