Magnetic recording medium comprising a polyoxyalkylene oxide bin

Details Magnetic recording medium comprising a polyoxyalkylene oxide bin Magnetic recording medium comprising a polyoxyalkylene oxide bin

1994-09-26

1995-07-25

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428328, 428332, 428403, 428407, 428694BG, 428900, 428694BA, 252 6254, G11B 500

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active

054360706

ABSTRACT:
A magnetic dispersion comprising finely divided iron power or iron alloy powder having a BET value of more than 35 m.sup.2 /g dispersed in a polymeric binder and organic solvent, whose filterability is markedly improved, is obtained by using certain low molecular weight phosphoric esters of the general formula I or II ##STR1## combined with a dispersion-active compound which contains at least one polar group capable of adsorption on the magnetic pigment. The polar group of the dispersion-active compound can be an acid or alkaline or amphoteric group or a group capable of hydrogen bonding or polarization. The dispersion-active compound can be a polycondensate, a polyaddition product or a chain growth copolymer which can also be used in the magnetic dispersion combined with customary other polymeric binders.

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