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AssigneeXerox Corporation
InventorsT. Hwee Ng, Arthur Helbrecht, Raj D. Patel, Grazyna E. Kmiecik-Lawrynowicz, David Kurceba, Francisco E. Torres, David J. Sanders
Estimating the term…
An in situ chemical process for the preparation of toner comprised of (i) the provision of a latex, which latex is comprised of polymeric resin particles, an ionic surfactant and a nonionic surfactant; (ii) providing a pigment dispersion, which dispersion is comprised of a pigment solution, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, and optionally a charge control agent; (iii) mixing said pigment dispersion with said latex with a stirrer equipped with an impeller, stirring at speeds of from about 100 to about 900 rpm for a period of from about 10 minutes to about 150 minutes; (iv) heating the above resulting blend of latex and pigment mixture to a temperature below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates; (v) adding further aqueous ionic surfactant or stabilizer in the range amount of from about 0.1 percent to 5 percent by weight of reactants to stabilize the above electrostatically bound toner size aggregates; (vi) heating said electrostatically bound toner sized aggregates above about the Tg of the resin to form toner size particles containing pigment, resin and optionally a charge control agent; (vii) optionally isolating said toner, optionally washing with water; and optionally (viii) drying said toner.
An in situ chemical process for the preparation of toner comprised of
A process for the preparation of pigmented toner size particles comprised of mixing a pigment dispersion with a latex, which mixing is accomplished with stirring at speeds of from about 100 to about 900 revolutions per minute and wherein the pigment dispersion is comprised of a pigment, a dispersing liquid containing a pigment dispersion component, a counterionic surfactant with a charge polarity of opposite sign to that of the ionic surfactant, and optionally a charge control agent;
A process for the preparation of toner, which process comprises the mixing of a pigment dispersion with a latex and which mixing is accomplished at low stirring speeds of from about 100 to about 900 revolutions per minute, and wherein the pigment dispersion is comprised of a pigment, a dispersing liquid containing a pigment dispersion component, and a counterionic surfactant with a charge polarity of opposite sign to that of the ionic surfactant;
Dependencies are inferred from the claim text.