Stock material or miscellaneous articles – Composite – Of polyamidoester
Patent
1982-07-08
1984-10-16
Robinson, Ellis P.
Stock material or miscellaneous articles
Composite
Of polyamidoester
252 6254, 360134, 360135, 360136, 428522, 428524, 428694, 428900, 427128, G11B 568, B32B 2740
Patent
active
044775318
ABSTRACT:
The present invention relates to a magnetic storage medium consisting of a non-magnetic layer support and, applied thereto, a binder-containing magnetic layer, the binder consisting of from 25 to 100% of a thermoplastic polyurethane substantially free from reactive terminal groups obtained by reacting a linear polyester of at least one dicarboxylic acid containing from 2 to 8 carbon atoms and/or hydroxy carboxylic acid containing from 4 to 6 carbon atoms and at least one glycol containing from 2 to 6 carbon atoms, the polyester having a molecular weight of from 1200 to 6000, at least one diisocyanate and a mixture of at least two glycols containing from 2 to 20 carbon atoms, the molar fraction of the individual components not exceeding 0.8. The polyurethane has a hardness of from 80 to 100 Shore A, a tensile strength of from 30 to 75 MPa and a breaking elongation of from 320 to 520%.
REFERENCES:
patent: 3149995 (1964-09-01), Bauer
patent: 3650828 (1972-03-01), Higashi
patent: 3922439 (1975-11-01), Hartmann
patent: 3929659 (1975-12-01), Graham
patent: 4018967 (1977-04-01), Roller
patent: 4058646 (1977-11-01), Vaeth
patent: 4320171 (1982-03-01), Motz
patent: 4328282 (1982-05-01), Lehner
Kober Heinrich
Kohler Robert
Meckel Walter
Nippe Burkhard
Quiring Bernd
Agfa-Gevaert AG
Robinson Ellis P.
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