Magnetic recording medium containing an isocyanate-free branched

Details Magnetic recording medium containing an isocyanate-free branched Magnetic recording medium containing an isocyanate-free branched

1990-08-13

1992-07-14

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428694, 428900, G11B 500

Patent

active

051302020

ABSTRACT:
Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer which is applied firmly thereon and is based on a polyurethane binder, not less than 50% by weight of binder consisting of a branched polyurethane elastomer having urea groups at the chain ends.

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patent: 2899411 (1959-08-01), Schollenberger
patent: 3320090 (1967-05-01), Graubart
patent: 3437510 (1969-04-01), Diaz
patent: 3574684 (1971-04-01), Higashi
patent: 3650828 (1972-03-01), Higashi
patent: 4183976 (1980-01-01), Yamada et al.
patent: 4477531 (1984-10-01), Kohler et al.
patent: 4895764 (1990-01-01), Lehner et al.
H. Fikentscher "Cellulose-Chemie" Mar. 13, 1932 58-64.
Abstr. J60-202528 Oct. 1985.
Abstr. J57-158021 Sep. 1982.

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