Coating processes – Magnetic base or coating – Magnetic coating
Patent
1987-04-20
1988-02-09
Pianalto, Bernard D.
Coating processes
Magnetic base or coating
Magnetic coating
427130, H01F 1002
Patent
active
047241624
ABSTRACT:
An improvement of a process for producing a magnetic recording medium comprising coating a non-magnetic support with a magnetic paint comprising a magnetic layer forming component containing ferromagnetic powder and a resin component dispersed in an organic solvent and drying the coated layer. The improvement resides in the preparation of the magnetic paint. In the improvement, the magnetic paint is obtained by kneading said magnetic layer forming component and a first solvent having a solubility parameter of not lower than 9.5[cal..multidot.cm.sup.-3 ].sup.1/2 as measured by Small method and adding a second solvent to the resulting kneaded product so that the mixed organic solvent in the magnetic paint has a solubility parameter of lower than 9.5[cal.multidot.cm.sup.-3 ].sup.1/2 to thereby disperse the magnetic layer forming component in the organic solvent.
Mizuno Chiaki
Ogawa Hiroshi
Ono Toshio
Saito Shinji
Tamai Yasuo
Fuji Photo Film Co. , Ltd.
Pianalto Bernard D.
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