Process for preparing electrostatic developer

Details Process for preparing electrostatic developer Process for preparing electrostatic developer

1983-06-07

1985-06-11

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making developer composition

430904, G03G 1100, G03G 910

Patent

active

045229090

ABSTRACT:
A process for preparing a developer for electrostatic images comprising: (1) immersing carrier beads in an organic solution of a resin material comprising a 1,2-butadiene or cyclized cis-1,4-butadiene homopolymer, or a mixture of at least one of the homopolymers and a styrene butadiene copolymer; evaporating the organic solvent of the solution, drying the immersed beads, and curing the resin material by a rotary drying method, to form a resin coating on the carrier beads; (2) blending toner materials at a temperature sufficient to form a toner mass, the toner materials comprising: (a) a binder resin, (b) a colorant, and (c) a charge controlling agent; and (3) pulverizing the blended toner mass to form toner particles and mixing the obtained toner particles with the coated carrier in a predetermined ratio of the total surface area of the carrier to the total projection area of the toner particles.

REFERENCES:
patent: 2892794 (1959-06-01), Insalaco
patent: 3338991 (1967-08-01), Insalaco
patent: 3526533 (1970-09-01), Jacknow et al.
patent: 3922382 (1975-11-01), Kukla et al.

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