Electrophotographic developer

Details Electrophotographic developer Electrophotographic developer

1991-07-24

1993-08-03

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

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

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

430109, 430904, G03G 9113

Patent

active

052328074

ABSTRACT:
The present invention provides an electrophotographic developer comprising (i) a toner containing, as a fixing resin, a styrene-acrylic copolymer presenting a gel permeation chromatogram showing a molecular-weight distribution in which the detection-starting molecular weight and the detection-ending molecular weight are respectively located in specific ranges, and (ii) a carrier coated with a coating resin which is a styrene-acrylic copolymer containing at least 2-hydroxyethyl acrylate.
Even though repeatedly agitated in the developing device, the electrophotographic developer of the present invention is not deteriorated and assures good durability and long life-time.

REFERENCES:
patent: 4042517 (1977-08-01), Moriconi et al.
patent: 4822708 (1989-04-01), Machida et al.
patent: 4882258 (1989-11-01), Ikeuchi et al.
patent: 4966829 (1990-10-01), Yasuda et al.
patent: 5021316 (1991-06-01), Kubo et al.
patent: 5071725 (1991-12-01), Kubo et al.
Patent Abstracts of Japan vol. 9, No. 190(P-378) Aug. 7, 1985 Konishiroku Shashin Kokyo K.K. (1) PN 60-59369, Apr. 1985.

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