Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1993-09-08
1995-06-13
Chapman, Mark A.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430109, 430108, G03G 900
Patent
active
054241618
ABSTRACT:
The present invention is directed to a toner composition containing a polyester resin having an OHV/AV value of 1.2 or more as a major component of a binder resin wherein AV is an acid value of said polyester and OHV is a hydroxyl value thereof and hydrophobic silica having a degree of hydrophobic property of 80 or more or having a pH value of 5.5 to 8 in water-methanol solution. A toner composition of the present invention exhibits no decrease in electric charge retainability and fluidity of a toner and a visible image with good quality for a long period with no black spots occurring.
REFERENCES:
patent: 4725521 (1988-02-01), Shigeta et al.
patent: 4804622 (1989-02-01), Tanaka et al.
patent: 4939059 (1990-06-01), Kawabe et al.
patent: 4946755 (1990-08-01), Inoue
patent: 5073468 (1991-12-01), Yamamoto et al.
Hayashi Norihiro
Hiramatsu Hiroyoshi
Kawabe Kuniyasu
Chapman Mark A.
Kao Corporation
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