发明名称 MAGNETIC RECORDING MEDIUM
摘要 PURPOSE:To obtain a magnetic recording medium with superior mechanical strength by using specified polyurethane resin as a binder for forming a magnetic layer. CONSTITUTION:A magnetic recording medium is obtd. by forming a magnetic layer on a substrate such as a polyester film using polyurethane resin as a binder. The polyurethane resin contains >=15wt% straight chain 4,4'-diphenylmethane diisocyanate as an isocyanate component. The diisocyanate has 2 benzene rings bonded together through a methylene group in the form of a straight chain and isocyanate groups bonded to the p-positions of both the benzene rings.
申请公布号 JPS5891524(A) 申请公布日期 1983.05.31
申请号 JP19810188714 申请日期 1981.11.24
申请人 HITACHI MAXELL KK 发明人 MIYATA ICHIJI;HIDAKA TOSHIROU;WATAYA SEIJI;MATSUURA TAKESHI
分类号 C09D5/23;C09D175/00;C09D175/04;G11B5/702 主分类号 C09D5/23
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