Magnetic recording medium having a low molecular weight azo dye including an aryl group
A single layer or dual layer magnetic recording medium comprising a non-magnetic substrate having a front side and a back side, a back coat formed on the back side. In a single layer medium, the magnetic layer comprises a ferromagnetic powder dispersed in a binder, and a surface modifier comprising...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
19.10.2004
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | A single layer or dual layer magnetic recording medium comprising a non-magnetic substrate having a front side and a back side, a back coat formed on the back side. In a single layer medium, the magnetic layer comprises a ferromagnetic powder dispersed in a binder, and a surface modifier comprising a low molecular weight azo dye. In the dual layer embodiment, a lower support layer is formed over the front side comprising a granular alpha iron oxide compound dispersed in a binder, and as a surface treatment agent, at least one low molecular azo dye having the following general formula:wherein Ar represents an aryl group, each of which independently comprises at least one pendant group selected from an electron donor, and an electron acceptor, and a magnetic layer is formed over the lower layer. |
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Bibliography: | Application Number: US20020328498 |