PROCESS FOR PRODUCING TONER
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Oct 18, 2012
filing date -
Oct 28, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An object of the present invention is to provide a process of producing a toner according to an emulsion aggregation process in which the temperature and treatment time in the fusion process can be reduced, and a toner having a small particle diameter, a sharp particle size distribution, and a properly controlled average circularity can be efficiently produced simply with a small amount of energy. The process includes aggregating a resin fine particles and a colorant fine particles by adding an aggregating agent containing a divalent or higher-valent metal ion, and fusing the resin fine particles and the colorant fine particles to obtain a toner particle by adding a chelating agent and a monovalent metal salt to the aggregate particle dispersion liquid obtained in the aggregation process, and heating the liquid to a temperature of not less than glass transition temperature of the resin.
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