Claims
- 1. A photoconductive imaging member comprised of an optional supporting substrate, a photogenerating layer, a charge transport layer, and an overcoating layer comprised of a polymer and a yellow dye, and wherein said yellow dye is of the formula
- 2. An imaging member in accordance with claim 1 wherein siad photogenerating layer is of a thickness of from about 0.1 to about 10 microns, said transport layer is of a thickness of from about 5 to about 100 microns, and wherein the amount of light contacting said photogenerating and said charge transport layers is substantially avoided.
- 3. An imaging member in accordance with claim 1 wherein said yellow dye component is present in an amount of from about 0.1 to about 5 weight percent, and wherein said overcoating layer substantially prevents light of a wavelength of about equal to or about less than 700 nanometers from interaction with said member, and wherein said overcoating optionally contains N,N′-diphenyl-N,N′-bis(3-hydroxyphenyl)-[1,1′-biphenyl]-4,4′-diamine (DHTPD), oxalic acid, and bis(4-diethylamino-2-methylphenyl)-4-methoxyphenylmethane [tris-TPM]methoxymethylated polyamide of Formula III, or mixtures thereof
- 4. An imaging member in accordance with claim 3 wherein the photogenerating layer contains a photogenerating pigment present in an amount of from about 5 to about 95 weight percent, and wherein said yellow dye component is present in an amount of from about 0.1 to about 1 weight percent, and wherein said overcoating layer substantially prevents light of a wavelength of about equal to or about less than 700 nanometers from interaction with said member.
- 5. An imaging member in accordance with claim 4 wherein the thickness of said photogenerator layer is from about 0.1 to about 5 microns.
- 6. An imaging member in accordance with claim 1 wherein said photogenerating layer contains a polymer binder.
- 7. An imaging member in accordance with claim 6 wherein said binder is present in an amount of from about 50 to about 90 percent by weight, and wherein the total of all of said layer components is about 100 percent.
- 8. An imaging member in accordance with claim 1 wherein the photogenerating component is a hydroxygallium phthalocyanine that absorbs light of a wavelength of from about 370 to about 950 nanometers.
- 9. An imaging member in accordance with claim 1 wherein the supporting substrate is comprised of a conductive substrate comprised of a metal.
- 10. An imaging member in accordance with claim 9 wherein the conductive substrate is aluminum, aluminized polyethylene terephthalate or titanized polyethylene terephthalate.
- 11. An imaging member in accordance with claim 6 wherein the binder is selected from the group consisting of polyesters, polyvinyl butyrals, polycarbonates, polystyrene-b-polyvinyl pyridine, and polyvinyl formals.
- 12. An imaging member in accordance with claim 1 wherein said photogenerator is a metal free phthalocyanine, and wherein said overcoating layer substantially prevents light of a wavelength of about equal to or less than about 700 nanometers from interaction with said member.
- 13. An imaging member in accordance with claim 1 wherein said charge transport comprises
- 14. An imaging member in accordance with claim 13 wherein alkyl contains from about 1 to about 10 carbon atoms.
- 15. An imaging member in accordance with claim 13 wherein alkyl contains from about 1 to about 5 carbon atoms.
- 16. An imaging member in accordance with claim 13 wherein alkyl is methyl.
- 17. An imaging member in accordance with claim 1 wherein said yellow dye absorbs light of a wavelength of from about 400 to about 460 nanometers, and wherein this absorption enables the avoidance or minimization of light shock to said photogenerating and said charge transport layers.
- 18. An imaging member in accordance with claim 1 wherein said photogenerating layer is comprised of Type V hydroxygallium phthalocyanine.
- 19. An imaging member in accordance with claim 18 wherein the Type V hydroxygallium phthalocyanine has major peaks, as measured with an X-ray diffractometer, at Bragg angles (2 theta+/−0.20) 7.4, 9.8, 12.4, 16.2, 17.6, 18.4, 21.9, 23.9, 25.0, 28.1 degrees, and the highest peak at 7.4 degrees.
- 20. An imaging member in accordance with claim 1 wherein said yellow dye component is present in an amount of from about 0.5 to about 1 weight percent.
- 21. A method of imaging which comprises generating an electrostatic latent image on the imaging member of claim 1, developing the latent image, and transferring the developed electrostatic image to a suitable substrate, and wherein said overcoating layer substantially prevents light of a wavelength of about equal to or about less than 700 nanometers from interaction with said member.
- 22. A method of imaging in accordance with claim 21 wherein the imaging member is exposed to light of a wavelength of from about 370 to about 950 nanometers.
- 23. A member comprised of a photogenerating layer, a charge transport layer and in contact with said charge transport a layer comprised of a polymer and a yellow dye optionally of the formula
- 24. A member comprised of a supporting substrate, a photogenerating layer, a hole transport layer, and an overcoating layer comprised of a polymer and a yellow dye, and which polymer is of the formula
- 25. An imaging member in accordance with claim 1 wherein said photogenerating layer is situated between said substrate and said charge transport.
- 26. An imaging member in accordance with claim 1 wherein said charge transport layer is situated between said substrate and said photogenerating layer.
- 27. An imaging member in accordance with claim 27 wherein said photogenerating layer contains a hydroxygallium phthalocyanine.
RELATED APPLICATION AND PATENTS
[0001] Illustrated in copending application U.S. Ser. No. 10/151,124 on Photoconductive Members, the disclosure of which is totally incorporated herein by reference, is a photoconductive imaging member comprised of a supporting substrate, a photogenerating layer and a charge transport layer, and wherein the charge transport layer contains a component that substantially prevents light of a wavelength of about equal to or about less than 700 nanometers from interaction with the photogenerating layer.
[0002] Illustrated in U.S. Pat. No. 5,756,245, the disclosure of which is totally incorporated herein by reference, is a photoconductive imaging member comprised of a hydroxygallium phthalocyanine photogenerator layer, a charge transport layer, a barrier layer, a photogenerator layer comprised of a mixture of bisbenzimidazo(2,1-a-1′,2′-b)anthra(2,1,9 def:6,5,10-d′e′f′)diisoquinoline-6,11-dione and bisbenzimidazo(2,1-a:2′,1′a)anthra(2,1,9-d′e′f′:6,5,10-d′e′f′)diisoquinoline-10,21-dione, and thereover a charge transport layer.
[0003] Illustrated in U.S. Pat. No. 5,521,306, the disclosure of which is totally incorporated herein by reference, is a process for preparation of Type V hydroxygallium phthalocyanine comprising the in situ formation of an alkoxy-bridged gallium phthalocyanine dimer, hydrolyzing the dimer to hydroxygallium phthalocyanine and subsequently converting the hydroxygallium phthalocyanine product to Type V hydroxygallium phthalocyanine.
[0004] Illustrated in U.S. Pat. No. 5,482,811, the disclosure of which is totally incorporated herein by reference, is a process for the preparation of hydroxygallium phthalocyanine which comprises hydrolyzing a gallium phthalocyanine precursor pigment by dissolving the hydroxygallium phthalocyanine in a strong acid and then reprecipitating the resulting dissolved pigment in basic aqueous media; removing any ionic species formed by washing with water, concentrating the resulting aqueous slurry comprised of water and hydroxygallium phthalocyanine to a wet cake; removing water from said slurry by azeotropic distillation with an organic solvent, and subjecting said resulting pigment slurry to mixing with the addition of a second solvent to cause the formation of said hydroxygallium phthalocyanine polymorphs.
[0005] Also, in U.S. Pat. No. 5,473,064, the disclosure of which is totally incorporated herein by reference, there is illustrated a process for the preparation of hydroxygallium phthalocyanine Type V, essentially free of chlorine, whereby a pigment precursor Type I chlorogallium phthalocyanine is prepared by reaction of gallium chloride in a solvent, such as N-methylpyrrolidone, present in an amount of from about 10 parts to about 100 parts, and preferably about 19 parts with 1,3-diiminoisoindolene (Dl3) in an amount of from about 1 part to about 10 parts, and preferably about 4 parts of Dl3, for each part of gallium chloride that is reacted; hydrolyzing said pigment precursor chlorogallium phthalocyanine Type I by standard methods, for example acid pasting, whereby the pigment precursor is dissolved in concentrated sulfuric acid and then reprecipitated in a solvent, such as water, or a dilute ammonia solution, for example from about 10 to about 15 percent; and subsequently treating the resulting hydrolyzed pigment hydroxygallium phthalocyanine Type I with a solvent, such as N,N-dimethylformamide, present in an amount of from about 1 volume part to about 50 volume parts and preferably about 15 volume parts for each weight part of pigment hydroxygallium phthalocyanine that is used by, for example, ball milling the Type I hydroxygallium phthalocyanine pigment in the presence of spherical glass beads, approximately 1 millimeter to 5 millimeters in diameter, at room temperature, about 25° C., for a period of from about 12 hours to about 1 week, and preferably about 24 hours.
[0006] The appropriate components, and processes of the above recited patents may be selected for the present invention in embodiments thereof.