Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1976-06-16
1977-04-26
Pianalto, Bernard D.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
428309, 428329, 428425, 428900, H01F 1002
Patent
active
040202275
ABSTRACT:
Magnetic tape having extraordinary performance characteristics and formed with a sparingly-crosslinked, polyurethane-based polymer binder system as a matrix for magnetic particles. The binder system is characterized by toughness of at least 150 in-lbs. per in.sup.3, and the ability to withstand video tape-Test for over an hour before any substantial tape degradation occurs. Magnetic coatings prepared according to the invention comprise a binder system of at least 50% of a tough polyurethane.
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Cesari Robert A.
Graham Magnetics Incorporated
Kehoe Andrew F.
McKenna John F.
Pianalto Bernard D.
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