Magnetic recording medium comprising binder that may be cured using both isocyanate and radiation curing techniques

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,...

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Bibliographic Details
Main Authors CHERNEGA, JOHN G, ANDERSON JEFFREY T, MUGGEE, JOHN M, MOSBEY, DERAL T
Format Patent
LanguageEnglish
French
German
Published 17.09.1997
Edition6
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary: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.
Bibliography:Application Number: EP19940119845