Toner for full-color electrophotography and method for forming f

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – To produce color reproduction

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Details

430109, 430110, 430111, 430903, G03G 1301, G03G 9087, G03G 9097

Patent

active

057562440

ABSTRACT:
The toner for full-color electrophotography usable for a fixing process by a heat roller, wherein a releasing oil is not applied on a surface of the heat roller, includes at least (a) a binder resin having as a main component a linear polyester obtainable using one or more monomers selected from the group consisting of saturated or unsaturated, aliphatic dicarboxylic acids, acid anhydrides thereof, and lower alkyl esters thereof as an acid component, provided that the saturated aliphatic dicarboxylic acids have carbon atoms of not less than 3, and that the unsaturated aliphatic dicarboxylic acids have carbon atoms of not less than 5, the linear polyester having a softening point of from 90.degree. to 120.degree. C. determined by "koka" type flow tester; (b) a releasing agent comprising carnauba wax; and (c) a coloring agent. The method for forming fixed images for full-color electrophotography includes the steps of forming an unfixed image by using three or four kinds of toners on a recording medium in single or more toner layers wherein said toners include at least one toner for full-color electrophotography of the present invention; and fixing by heat and pressure the unfixed image using a heat roller without a device for applying a releasing oil.

REFERENCES:
patent: 4387211 (1983-06-01), Yasuda et al.
patent: 4657837 (1987-04-01), Morita et al.
patent: 5143809 (1992-09-01), Kaneko et al.
patent: 5256512 (1993-10-01), Kobayashi et al.
patent: 5578409 (1996-11-01), Kotaki et al.
English-Language Japio Abstract 04349877 of Japanese Patent 05-341577 (Pub. Dec. 1993).
English language Derwent abstract of JP5-341577 (Pub. Dec. 1993).
English--Abstract of JP 57-109825.
English Abstract of JP 84-011902.
English Abstract of JP 5341557.
English Abstract of JP 5249745.

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