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MAGNETIC RECORDING MEDIUM AND COATING COMPOSITION FOR MAGNETIC RECORDING MEDIUM

  • US 20140374645A1
  • Filed: 06/23/2014
  • Published: 12/25/2014
  • Est. Priority Date: 06/24/2013
  • Status: Abandoned Application
First Claim
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1. A magnetic recording medium comprising a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein:

  • an average particle size of the ferromagnetic powder is equal to or less than 50 nm;

    the magnetic layer further comprises a compound; and

    the compound comprises at least one polyalkyleneimine chain and at least one polyester chain, with a proportion in the compound accounted for by the polyalkyleneimine chain being less than 5.0 weight percent and a number average molecular weight of the polyalkyleneimine chain ranging from 300 to 3,000.

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