Magnetic recording medium having a protective layer containing a tetrazaindene or thiouracil cyclic compound and a fluorine compound
AssigneeFuji Photo Film Co., Ltd.
InventorsTsutomu Okita, Toshio Ishida, Masaki Satake, Tadashi Yasunaga, Kazuyuki Usuki
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Abstract
The magnetic recording medium of the present invention comprises a ferromagnetic metallic thin film formed on a non-magnetic support, whereby a protective layer is formed on the ferromagnetic metallic thin film, said protective layer contains at least one type of thiouracil cyclic compounds having hydrocarbon group and at least one type of fluorine compounds having hydrocarbon group, or at least one type of tetrazaindene cyclic compounds and at least one type of fluorine compounds having hydrocarbon group, and no rusting occurs even when it is repeatedly run.
Claims8
A magnetic recording medium, comprising a ferromagnetic metallic thin film on a non-magnetic support, whereby a protective layer is formed on said ferromagnetic metallic thin film, said protective layer containing (i) at least one thiouracil cyclic compound represented by the following general formula (1):
- ##STR25## wherein R represents a hydrocarbon group having 3 to 20 carbon atoms;
- or at least one tetrazaindene compound represented by the following general formula (2):
- ##STR26## wherein R represents a hydrocarbon group having 3 to 26 carbon atoms;
- and (ii) at least one fluorine compound having a hydrocarbon group.
Dependencies are inferred from the claim text.