Claims
- 1. A process for the preparation of toner which consists essentially of mixing a colorant dispersion and a latex, wherein said colorant dispersion is comprised of colorant and ionic surfactant, and said latex is comprised of resin and counterionic surfactant; heating below the resin Tg temperature; adding in situ tricalcium phosphate; heating above the resin Tg, followed by optionally washing with water, and optionally drying said toner.
- 2. A process in accordance with claim 1 wherein the amount of tricalcium phosphate (TCP) selected is about 0.1 to about 5.0 weight percent based on the weight percent of all components selected.
- 3. A process in accordance with claim 1 wherein the in situ tricalcium phosphate is in the form of solid particles having a size of from about 0.2 to 0.8 micron volume average diameter.
- 4. A process in accordance with claim 1 wherein the resin is selected from the group consisting of poly(styrene-butadiene), poly(para-methyl styrene-butadiene), poly(meta-methylstyrene-butadiene), poly(alpha-methylstyrene-butadiene), poly(methylmethacrylate-butadiene), poly(ethylmethacrylate-butadiene), poly(propylmethacrylate-butadiene), poly(butylmethacrylate-butadiene), poly(methylacrylate-butadiene), poly(ethylacrylate-butadiene), poly(propylacrylate-butadiene), poly(butylacrylate-butadiene), poly(styrene-isoprene), poly(para-methyl styrene-isoprene), poly(meta-methylstyrene-isoprene), poly(alpha-methylstyrene-isoprene), poly(methylmethacrylate-isoprene), poly(ethylmethacrylate-isoprene), poly(propylmethacrylate-isoprene), poly(butylmethacrylate-isoprene), poly(methylacrylate-isoprene), poly(ethylacrylate-isoprene), poly(propylacrylate-isoprene), and poly(butylacrylate-isoprene).
- 5. A process in accordance with claim 1 wherein there results said toner composition with a volume average diameter of from about 1 to about 10 microns.
- 6. A process in accordance with claim 1 wherein said in situ tricalcium phosphate is in a solid form and is present in an amount of 0.8 to 2.3 percent by weight.
- 7. A process in accordance with claim 6 wherein said colorant is a pigment.
Parent Case Info
This application is a continuation of application Ser. No. 08/707,037, filed Sep. 3, 1996 U.S. Pat. No. 5,723,252.
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Continuations (1)
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Number |
Date |
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Parent |
707037 |
Sep 1996 |
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