Stock material or miscellaneous articles – Composite – Of polyamidoester
Patent
1994-09-29
1996-09-03
Resan, Stevan A.
Stock material or miscellaneous articles
Composite
Of polyamidoester
428694BU, 428694BY, 428900, G11B 5702
Patent
active
055522297
ABSTRACT:
In magnetic recording media consisting of a nonmagnetic substrate and at least one magnetizable layer firmly applied thereon and based on magnetic material dispersed in a binder mixture which contains at least one hydroxyl-containing, preferably low molecular weight polyureaurethane and one polyurethaneurea (meth)acrylate, the polyurethaneurea (meth)acrylate is obtained by reacting a poly(meth)acrylate having up to 2 terminal OH groups per mol and a molecular weight of from 200 to 50,000 with a mixture of aliphatic polyisocyanates having an average functionality of from 3.0 to 6.0 NCO groups per mol, consisting of
from 0.1 to 10% by weight of a diisocyanate, from 30 to 80% by weight of a triisocyanate and from 20 to 60% by weight of an isocyanate having a functionality of from 4 to 10, with the proviso that from 1.2 to 3.0 NCO groups react per OH group and the remaining NCO groups are converted into substituted terminal urea groups with a polyfunctional amine or with a mixture of different polyfunctional amines.
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Brodt Gregor
Lehner August
Lenz Werner
Loch Werner
Schneider Norbert
BASF Magnetics GmbH
Resan Stevan A.
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