Toner having titania and processes thereof
AssigneeXerox Corporation
InventorsYi Xin Gong, Daryl W. Vanbesien, Shigang Qiu, Edward Graham Zwartz, Karen Ann Moffat, Richard P. N. Veregin, Cuong Vong, C. Geoffrey Allen
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Abstract
The present disclosure provides white toner compositions and processes for making same. In embodiments, a desirable white toner may be produced without having to resort to excessive pigment loading, having desirable gloss characteristics.
Claims19
A toner comprising:
- at least one resin;
- and
- at least one colorant comprising titanium dioxide that has been subjected to an alumina surface treatment and that contains alumina, said titanium dioxide further having an oil absorption of from 10 to 25 pounds of oil per 100 pounds of titanium dioxide, said titanium dioxide having a specific gravity of from 3.6 to 4.4,
- wherein the toner has a gloss of from 15 ggu to 70 ggu;
- wherein the toner is an emulsion aggregation toner having a volume average particle diameter of from 4 to 15 microns and a number average geometric size distribution of less than 1.31.
A toner according to 13, wherein the wax is selected from the group consisting of polyolefins, carnauba wax, rice wax, candelilla wax, sumacs wax, jojoba oil, beeswax, montan wax, ozokerite, ceresin, paraffin wax, microcrystalline wax, Fischer-Tropsch wax, stearyl stearate, behenyl behenate, butyl stearate, propyl oleate, glyceride monostearate, glyceride distearate, pentaerythritol tetra behenate, diethyleneglycol monostearate, dipropyleneglycol distearate, diglyceryl distearate, triglyceryl tetrastearate, sorbitan monostearate, cholesteryl stearate, and combinations thereof, present in an amount from 1 weight percent to 25 weight percent of the toner.
A white toner comprising:
- at least one polyester resin;
- at least one colorant comprising rutile titanium dioxide that has been subjected to an alumina surface treatment, and that contains silica and alumina, said titanium dioxide having an oil absorption of from 15 to 20 pounds of oil per 100 pounds of titanium dioxide, said titanium dioxide having a specific gravity of from 3.8 to 4.2,
- wherein the silica is present in an amount from 1 to 4 percent by weight of the colorant and the titanium dioxide is present in an amount from 90 to 99.9 percent by weight of the colorant, and wherein the toner has a gloss of from 15 ggu to 70 ggu;
- wherein the toner is an emulsion aggregation toner having a volume average particle diameter of from 4 to 15 microns, a number average geometric size distribution of less than 1.31, and a circularity of from 0.92 to 0.99.
Dependencies are inferred from the claim text.