Stock material or miscellaneous articles – Composite – Of aldehyde or ketone condensation product
Patent
1973-11-19
1976-03-02
Pianalto, Bernard D.
Stock material or miscellaneous articles
Composite
Of aldehyde or ketone condensation product
428538, 428539, 428900, H01F 1002
Patent
active
039419118
ABSTRACT:
An improved magnetic tape having the property of retaining magnetic data even when spooled and subjected to high temperature environments. This thermal resistance is suitably achieved by providing a backing coating which contacts the magnetic-particle-bearing facing coating of the tape and is chemically incompatible therewith. Pairs of chemically-incompatible coatings include polyester polyurethane-polyether-polyurethane; polyfluorinated hydrocarbons-polyurethane. A conductive furnace carbon black is advantageously used in the backing coating, and the substrate is, suitably, temperature-resistant polyimide.
REFERENCES:
patent: 2871218 (1959-01-01), Schollenberger
patent: 2899411 (1959-08-01), Schollenberger
patent: 3293066 (1966-12-01), Haines
patent: 3320090 (1967-05-01), Graubart
patent: 3384679 (1968-05-01), Stetz
patent: 3484286 (1969-12-01), Beck et al.
patent: 3617378 (1971-11-01), Beck
patent: 3649541 (1972-03-01), Ingersoll
Cesari Robert A.
Graham Magnetics Incorporated
Kehoe Andrew F.
McKenna John F.
Pianalto Bernard D.
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