In situ coating then spray drying of magnetic toner

Details In situ coating then spray drying of magnetic toner In situ coating then spray drying of magnetic toner

1977-05-02

1980-03-11

Pianalto, Bernard D.

Coating processes

Magnetic base or coating

427215, 427216, 427221, 427346, 427409, 427435, 427 58, 427 87, 427130, 427131, 427214, 427107, 252 635, 4273722, 4273837, 4274071, 4274301, B05D 512

Patent

active

041929020

ABSTRACT:
A method of toner formation wherein a dispersion of magnetic pigment, resin, solvent and surfactant is spray dried to form the toner particles. Two preferred processes are disclosed: (1) A dispersion of magnetite, resin, fatty acid, and solvent is prepared by high speed agitation. The dispersion is then spray dried to form toner particles. (2) A dispersion of magnetite, fatty acid and solvent is subject to reflux heating, followed by addition of resin solution prior to spray drying to form toner particles.

REFERENCES:
patent: 3790407 (1974-02-01), Merten et al.
patent: 3922381 (1975-11-01), Datta
patent: 3928220 (1975-12-01), Slusarczuk
patent: 3947370 (1976-03-01), Miller
patent: 3973948 (1976-08-01), Laferty
patent: 3996392 (1976-12-01), Berg et al.
patent: 4075391 (1978-02-01), Berg et al.
Chemistry of Organic Compounds, Noller, pp. 151 & 156

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