Processes for the preparation of photogenerating pigments
AssigneeXerox Corporation
InventorsPeter M. Kazmaier, James M. Duff, Gordon K. Hamer, Charles G. Allen, Sandra J. Gardner
Life of this patent
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Abstract
A process which comprises adding a pigment to a solution of trihaloacetic acid and toluene; adding the solution to a nonsolvent for the pigment; and separating the product from the solution.
Claims25
A process for the preparation of a titanyl phthalocyanine photogenerating pigment consisting essentially of dissolving said pigment in a solution of trihaloacetic acid and toluene;
- adding the solution to a nonsolvent of toluene, an alcohol, water, or a mixture of water and an alcohol for the pigment whereby a precipitate of said pigment results;
- and separating the precipitated titanyl phthalocyanine from the solution, which titanyl phthalocyanine has a particle size diameter of from between about 0.05 micron to about 1 micron.
A process for the preparation of titanyl phthalocyanine pigments consisting essentially of dissolving said titanyl phthalocyanine in solution of trihaloacetic acid and toluene;
- adding the solution to a nonsolvent of toluene, an alcohol, water, or a mixture of water and an alcohol for the titanyl phthalocyanine whereby a precipitate titanyl phthalocyanine results;
- and separating the desired titanyl phthalocyanine photogenerating pigment product from the solution by filtration and wherein the average particle diameter of the titanyl phthalocyanine product is from about 0.05 micron to about 1 micron.
A process for the preparation of titanyl phthalocyanine photogenerating pigments consisting essentially of dissolving said pigment in a solution of trifluoroacetic acid and toluene;
- adding the solution to a nonsolvent of toluene, an alcohol, water, or a mixture of water and an alcohol for the pigment whereby a precipitate results;
- and separating the desired photogenerating pigment product from the solution by filtration and wherein the titanyl phthalocyanine has a particle diameter of from about 0.05 micron to about 1 micron.
A process for the preparation of titanyl phthalocyanine photogenerating pigments consisting essentially of dissolving said titanyl phthalocyanine in a solution of trifluoroacetic acid and toluene;
- adding the solution to a stirred mixture of an alcohol and water whereby a precipitate results;
- and separating the desired photogenerating titanyl phthalocyanine pigment product from the solution by filtration and wherein the titanyl phthalocyanine has a particles diameter of from about 0.05 micron to about 1 micron.
A process for the preparation of titanyl phthalocyanine photogenerating pigments consisting essentially of dissolving said titanyl phthalocyanine in a solution of trifluoroacetic acid and toluene;
- adding the solution to an alcohol, water, or toluene, whereby a precipitate results;
- and separating the desired photogenerating titanyl phthalocyanine pigment product from the solution by filtration, which pigment has a particle size diameter of from about 0.05 to about 1 micron.
Dependencies are inferred from the claim text.