发明名称 |
Magnetic recording medium containing magnetic material dispersed in a polyurethaneurea-polyurethane binder |
摘要 |
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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申请公布号 |
US5552229(A) |
申请公布日期 |
1996.09.03 |
申请号 |
US19940314956 |
申请日期 |
1994.09.29 |
申请人 |
BASF MAGNETICS GMBH |
发明人 |
BRODT, GREGOR;VASS, ATTILA;LOCH, WERNER;LEHNER, AUGUST;LENZ, WERNER;SCHNEIDER, NORBERT |
分类号 |
C08G18/10;C08G18/62;C08G18/78;C09D5/23;C09D175/00;C09D175/04;G11B5/702;(IPC1-7):G11B5/702 |
主分类号 |
C08G18/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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