Back to results
US 5,962,125 AGranted
Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorKouichi Masaki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFuji Photo Film Co., Ltd.
InventorKouichi Masaki
Estimating the term…
A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon at least one magnetic layer comprising a binder and a ferromagnetic metal powder mainly composed of iron, wherein the amount of a complex of iron with benzohydroxamic acid formed in the magnetic recording medium is from 0 to 6.0 ppm/g. Also, a magnetic recording medium is disclosed, which comprises a non-magnetic support having thereon at least two layers comprising a non-magnetic layer comprising a non-magnetic powder and a binder provided on a non-magnetic support and a magnetic layer comprising a binder and a ferromagnetic metal powder mainly composed of iron provided on said non-magnetic layer, wherein said non-magnetic powder contained in said non-magnetic layer forms a complex of iron with benzohydroxamic acid in an amount of from 0 to 10 ppm/g and has a water-soluble sodium salt content of from 0 to 150 ppm/g and a total water-soluble alkaline earth metal salt content of from 0 to 50 ppm/g. The present invention provides a magnetic recording medium excellent in practical performance such as running properties, durability and storage properties.
A magnetic recording medium comprising a non-magnetic support having thereon at least one magnetic layer comprising a binder and a ferromagnetic metal powder mainly composed of iron, wherein the amount of iron present is such that an amount of a complex formed by the reaction of the iron with benzohydroxamic acid is from 0 to 6.0 ppm/g.
A magnetic recording medium which comprises a non-magnetic support having thereon at least two layers comprising a non-magnetic layer comprising a non-magnetic powder comprising iron oxide and a binder provided on a non-magnetic support and a magnetic layer comprising a binder and a ferromagnetic metal powder mainly composed of iron provided on said non-magnetic layer, wherein the amount of iron present is such that an amount of a complex is formed by the reaction of the iron in the non-magnetic powder contained in said non-magnetic layer with benzohydroxamic acid is from 0 to 10 ppm/g and has a water-soluble sodium salt content of from 0 to 150 ppm/g and a total water-soluble alkaline earth metal salt content of from 0 to 50 ppm/g.
Dependencies are inferred from the claim text.