Electrophotographic toner made by polymerizing monomers in solut

Details Electrophotographic toner made by polymerizing monomers in solut Electrophotographic toner made by polymerizing monomers in solut

1986-05-29

1988-10-11

Welsh, J. David

Radiation imagery chemistry: process, composition, or product th

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

Post imaging process, finishing, or perfecting composition...

430111, 430137, 524853, 524901, G03G 908, C08J 320

Patent

active

047771046

ABSTRACT:
Disclosed is a process in which a spherical electrophotographic toner containing a colorant and having a particle size suitable for the electrophotography is directly formed in the polymerization process for formation of a binder resin. If a reaction medium capable of dissolving a monomer but incapable of dissolving a formed polymer is used and polymerization is carried out in the presence of a radical polymerization initiator in the state where the monomer, the colorant and other additives are dissolved or dispersed in the reaction medium, an electrophotographic toner having a desired particle size is obtained. According to this process, the particle size of the colored resin is stably controlled to 1 to 30 .mu.m suitable for a toner in the polymerization process, and the particle size distribution is very sharp.

REFERENCES:
patent: 3391082 (1968-07-01), Maclay
patent: 3931092 (1976-01-01), Ramlow et al.
patent: 3941898 (1976-03-01), Sadamatsu
patent: 4016099 (1977-04-01), Wellman
patent: 4077804 (1978-03-01), Vanzo
patent: 4232111 (1980-11-01), Miyazako et al.
patent: 4269760 (1981-05-01), Wakimoto et al.
patent: 4559303 (1985-12-01), Aotani et al.

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