Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1996-05-13
1998-01-06
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430111, G03G 9097
Patent
active
057053065
ABSTRACT:
A toner for forming an electrophotographic image is disclosed. The toner comprises (1) colored particles comprising a resin and a colorant, (2) fine resin particles comprising a polymer formed by condensation of melamine and formaldehyde, and have a volume average diameter of 0.01 .mu.m to 1.0 .mu.m, and (3) fine particles of an inorganic material (I) having a volume average diameter of 0.01 .mu.m to 0.20 .mu.m and a standard deviation of distribution of the volume average diameter G satisfying the condition of 10.ltoreq..sigma..ltoreq.30. It is particularly preferred that the toner is used as a tow componet developer together with a negatively chargeable carrier which comprises (1) magnetic core particles each coated with a coating layer comprising a mixture of homopolymer of an alicyclic methacrylate monomer and a homopolymer of an acyclic methacrylate monomer, or a copolymer of an alicyclic methacrylate monomer and an acyclic methacrylate monomer, and (2) a fine particles of an inorganic material (II).
REFERENCES:
patent: 5080992 (1992-01-01), Mori et al.
patent: 5538830 (1996-07-01), Swidler
Ishikawa Michiaki
Kitani Ryuji
Nagase Tatsuya
Shirose Meizo
Ujihara Keiko
Bierman Jordan B.
Goodrow John
Konica Corporation
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