Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1990-08-20
1993-11-23
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...
430110, 430904, G03G 900
Patent
active
052643115
ABSTRACT:
In an electrophotographic toner, by using as the binder resin a styrene/acrylic resin in which in the gel permeation chromatogram, a high molecular weight peak value appears in a molecular weight region higher than 1.times.10.sup.5, a low molecular weight peak value appears in a molecular weight region of from 2.times.10.sup.4 to 500, a minimum value appears halfways between the two peaks and the ratio (V/P) of the area of the valley to the peak area is lower than 0.3, the internal cohesive force of the binder resin for the toner can be prominently improved while maintaining the low-temperature fixing property and offset resistance at high levels, and pulverization of the toner and formation of the spent toner can be prevented during the developing operation and the durability of the toner can be improved.
REFERENCES:
patent: 4626488 (1986-12-01), Inoue
patent: 4966829 (1990-10-01), Yasuda et al.
patent: 5077168 (1991-12-01), Ogami et al.
patent: 5110704 (1992-05-01), Inoue et al.
Inoue Masahide
Kuroki Mitsushi
Nakano Tetsuya
Shimizu Yoshitake
Tsuyama Koichi
Crossan Stephen
McCamish Marion E.
Mita Industrial Co. Ltd.
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