05501935 is referenced by 259 patents and cites 8 patents.

A process for the preparation of toner compositions consisting essentially of

(i) preparing a pigment dispersion, which dispersion is comprised of a pigment, an ionic surfactant, and optionally a charge control agent;

(ii) shearing said pigment dispersion with a latex or emulsion blend comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, and a nonionic surfactant;

(iii) heating the above sheared blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates with a narrow particle size distribution;

(iv) subsequently adding further anionic or nonionic surfactant solution to minimize further growth in the coalescence (v); and

(v) heating said bound aggregates above about the Tg of the resin and wherein said heating is from a temperature of about 103.degree. to about 120.degree. C., and wherein said toner compositions are spherical in shape.

Title
Toner aggregation processes
Application Number
8/373806
Publication Number
5501935
Application Date
January 17, 1995
Publication Date
March 26, 1996
Inventor
Grazyna E Kmiecik Lawrynowicz
Burlington
CA
Paul J Gerroir
Oakville
CA
Michael A Hopper
Toronto
CA
Raj D Patel
Oakville
CA
Agent
E O Palazzo
Assignee
Xerox Corporation
CT, US
IPC
G03G 9/08
G03G 9/087
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