Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1997-11-26
1999-03-23
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430111, 430137, 430138, 430109, G03G 9087, G03G 9093
Patent
active
058857435
ABSTRACT:
Disclosed are an electrophotographic toner which is a spherical particle comprising a binder resin having encapsulated therein a colorant and has a volume average particle size of from 3 to 12 .mu.m, the binder resin being a non-crosslinked styrene-acrylic resin having an acid value of from 30 to 120, containing from 5 to 60% by weight of the components having a molecular weight in terms of polystyrene by gel permeation chromatography of 200,000 or more and having a ratio (Mw/Mn) of the weight-average molecular weight Mw to the number-average molecular weight Mn of from 4 to 30; and a process for preparing an electrophotographic toner comprising spherical particles having a volume average grain size of from 3 to 12 .mu.m, the process comprising mixing a mixture comprising the above-described resin, a colorant, a wax and an organic solvent as essential components with an aqueous medium in the presence of a neutralizer in an amount sufficiently large to render the resin self-emulsifiable to effect phase inversion emulsification, thereby producing particles each comprising a binder resin having encapsulated therein a colorant and a wax in the liquid medium, and separating and drying the particles. The toner obtained by the present invention is improved in the thermal fixing characteristics and the environmental stability of charging, exhibits a wide fixing temperature width at the heated roll fixing and has excellent triboelectricity.
REFERENCES:
patent: 5364721 (1994-11-01), Asada et al.
patent: 5556583 (1996-09-01), Tashiro et al.
patent: 5712071 (1998-01-01), Mikuriya et al.
Hirabayashi Kenichi
Ito Takashi
Itoya Kazuo
Matsuki Koichiro
Nomura Minoru
Dainippon Ink and Chemicals Inc.
Martin Roland
LandOfFree
Electrophotographic toner and process for the preparation thereo does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrophotographic toner and process for the preparation thereo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrophotographic toner and process for the preparation thereo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2123463