Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1994-07-20
1996-05-07
Hamilton, III, Thomas
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
525191, G03G 9087, C08L 2508
Patent
active
055145108
ABSTRACT:
The present invention is concerning a binder resin for an electrophotographic toner, which comprises a mixture of polymers comprising styrenic monomer units with or without acrylic or methacrylic monomer units. This binder resin has at least one peak in the range of each molecular weight of less than 30,000 and not less than 150,000 in the molecular weight distribution by the GPC analysis. The binder resin of the present invention satisfies sevelal specified inequalities concerning the relations among the molecular weight distribution, the glass transition temperature and the rheological characteristics of said resin. The binder resin of the invention satisfies all properties of the lowest fixing temperature, the lowest temperature when the hot offsett was observed and the running stability, which is important as a properties of the toner, in a higher level than the previous ones.
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Abstract of JP-4190244, Sanyo Chem Ind Ltd, Binder for Electrophotographic Toner, Jul. 8, 1992.
Abstract of JP-58082258, Canon KK, Dry Processable Toner, May 17, 1983.
Forgo, The Society for Imaging Science and Technology vol. 37, No. 2, "Styrene-Acrylate Copolymers as Toner Resins: Correlations Between Molecular Structure, Viscoelastic Behavior, and Fusing Properties", pp. 176-186, Mar. 1993.
Abstract of JP-1-303447, Inoue, "Toner for Developing Electrostatic Charge Image", Jul. 12, 1989.
Abstract of JP-62-115170, Iwatomo, "Resin Composition for Electrphotographic Toner", May 26, 1987.
Hamilton, III Thomas
Sanyo Chemical Industries Ltd.
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