Claims
- 1. A photoconductive imaging member comprised of an optional supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said charge transport layer is comprised of a charge transport component and a polysiloxane.
- 2. An imaging member in accordance with claim 1 wherein said polysiloxane is a crosslinkable polysiloxane.
- 3. An imaging member in accordance with claim 2 wherein said polysiloxane is of the formula
- 4. An imaging member in accordance with claim 3 wherein said polysiloxane possesses a weight average molecular weight Mw of from about 200 to about 200,000.
- 5. An imaging member in accordance with claim 3 wherein said polysiloxane possesses an Mn of from about 100 to about 100,000.
- 6. An imaging member in accordance with claim 3 wherein said polysiloxane possesses an Mw of from about 2,000 to 500,000, and a number average molecular weight Mn of from about 1,000 to about 25,000 are preferred.
- 7. An imaging member in accordance with claim 3 wherein said polysiloxane possesses a crosslinking value of from about 50 percent to about 100 percent gel as measured by FT-IR.
- 8. An imaging member in accordance with claim 3 wherein said polysiloxane possesses a crosslinking value of from about 80 percent to about 100 percent gel.
- 9. An imaging member in accordance with claim 1 wherein said polysiloxane is selected from the group comprised of methacryloxypropylsilsesquioxane-dimethylsiloxane copolymer, (methylacryloxypropyl)methylsiloxane-dimethylsiloxane copolymer, polydimethylsiloxane methacryloxypropyl terminated, polydimethylsiloxane acryloxyl terminated, diphenylsiloxane-dimethylsiloxane copolymer methacryloxypropyl terminated, phenylmethylsiloxane-dilphenylsiloxane copolymer methacryloxypropyl terminated and phenylmethylsiloxane-dimethylsiloxane copolymer methacryloxypropyl terminated, (methylacryloxypropyl)methylsiloxane-dimethylsiloxane copolymer and phenylmethylsiloxane-dilphenylsiloxane copolymer methacryloxypropyl terminated.
- 10. An imaging member in accordance with claim 1 wherein said polysiloxane is a (methylacryloxypropyl)methylsiloxane-dimethylsiloxane copolymer with an Mw of from about 500 to about 5,000 and a crosslinking value of from about 80 to about 100 percent.
- 11. An imaging member in accordance with claim 3 wherein said polysiloxane is present in an amount of from about 0.1 to about 50 weight percent based on the weight percent of charge transport components and said polysiloxane.
- 12. An imaging member in accordance with claim 3 wherein said polysiloxane is present in an amount of from about 0.5 to about 25 weight percent.
- 13. An imaging member in accordance with claim 3 wherein said polysiloxane is present in an amount of from about 1 to about 15 weight percent.
- 14. An imaging member in accordance with claim 3 wherein said polysiloxane is present in an amount of from about 0.1 to about 50 weight percent, said charge transport component is present in an amount of from about 10 of about 75 weight percent, and wherein the total thereof is about 100 percent.
- 15. An imaging member in accordance with claim 3 wherein n, the number of repeating segments, is from about 1 to about 5,000.
- 16. An imaging member in accordance with claim 3 wherein n, the number of repeating segments, is from about 10 to about 200.
- 17. An imaging member in accordance with claim 3 wherein n, the number of repeating segments, is from about 1,000 to about 4,000.
- 18. An imaging member in accordance with claim 1 wherein said polysiloxane and said charge transport component are crosslinked by a free radical reaction.
- 19. An imaging member in accordance with claim 1 comprised in the following sequence of a supporting substrate, an adhesive layer, a photogenerating layer, and said charge transport layer mixture.
- 20. An imaging member in accordance with claim 19 wherein the adhesive layer is comprised of a polyester with an optional Mw of from about 50,000 to about 90,000, and an optional Mn of about 25,000 to about 45,000.
- 21. An imaging member in accordance with claim 1 wherein the supporting substrate is comprised of a conductive substrate.
- 22. An imaging member in accordance with claim 21 wherein the conductive substrate is aluminum, aluminized polyethylene terephthalate or titanized polyethylene terephthalate.
- 23. An imaging member in accordance with claim 1 wherein said photogenerator layer is of a thickness of from about 0.05 to about 10 microns, and said transport layer is of a thickness of from about 10 to about 50 microns.
- 24. An imaging member in accordance with claim 1 wherein the photogenerating layer is comprised of photogenerating pigments dispersed in a resinous binder, and which pigments are present in an amount of from about 5 percent by weight to about 95 percent by weight, and optionally dispersed in a resinous binder selected from the group consisting of polyesters, polyvinyl butyrals, polycarbonates, polystyrene-b-polyvinyl pyridine, and polyvinyl formals.
- 25. An imaging member in accordance with claim 1 wherein said charge transport layer comprises aryl amine molecules of the formula
- 26. An imaging member in accordance with claim 25 wherein the aryl amine is N,N′-diphenyl-N,N-bis(3-methyl phenyl)-1,1′-biphenyl-4,4′-diamine.
- 27. An imaging member in accordance with claim 1 wherein the photogenerating layer is comprised of metal phthalocyanines, metal free phthalocyanines, or a hydroxygallium phthalocyanine.
- 28. A method of imaging which comprises generating an image on the imaging member of claim 1, developing the latent image, and transferring the image to a substrate.
- 29. A photoconductive imaging member comprised in sequence of a supporting substrate, a photogenerating layer, and a charge transport layer, and which layer is comprised of a charge transport component and a methacrylate polysiloxane of the formula
- 30. An imaging member in accordance with claim 29 wherein said polysiloxane possesses an Mw of from about 20,000 to about 100,000, and an Mn of from about 10,000 to about 50,000.
- 31. A xerographic apparatus comprising a charging component, the photoconductive component of claim 1, a development component, a transfer component, and an optional cleaning component.
- 32. An imaging member in accordance with claim 9 wherein the Mw of said polysiloxane is from about 20,000 to about 100,000, and the Mn is from about 10,000 to about 50,000.
- 33. An imaging member in accordance with claim 3 wherein said alkyl contains from about 1 to about 25 carbon atoms, and said aryl contains from about 6 to about 30 carbon atoms.
- 34. An imaging member in accordance with claim 3 wherein said alkyl and said aryl are substituted with halide, alkoxy, or amino.
- 35. An imaging member in accordance with claim 1 wherein said polysiloxane is crosslinked.
- 36. An imaging member in accordance with claim 3 wherein X is oxygen.
- 37. An imaging member in accordance with claim 3 wherein Y is oxygen.
- 38. A photoconductive member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said charge transport layer is comprised of a charge transport component and a polysiloxane; and wherein said polysiloxanes is of the formula
- 39. A photoconductive member in accordance with claim 38 wherein said photogenerating layer contains a hnydroxygallium phthalocyanine.
RELATED PATENTS
[0001] Illustrated in U.S. Pat. No. 5,645,965, the disclosure of which is totally incorporated herein by reference, are photoconductive imaging members with perylenes and a number of charge transports, such as amines.
[0002] Illustrated in U.S. Pat. No. 6,287,737, the disclosure of which is totally incorporated herein by reference, is a photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) and water.
1
[0003] wherein A, B, D, and F represent the segments of the polymer backbone; E is an electron transporting moiety; X is selected from the group consisting of chloride, bromide, iodide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1; R is alkyl, substituted alkyl, aryl, or substituted aryl, with the substituent being halide, alkoxy, aryloxy, and amino; and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, and halide.
[0004] Illustrated in U.S. Pat. No. 5,874,193, the disclosure of which is totally incorporated herein by reference, are photoconductive imaging members with a hole blocking layer comprised of a crosslinked polymer derived from crosslinking an alkoxysilyl-functionalized polymer bearing an electron transporting moiety. In U.S. Pat. No. 5,871,877, the disclosure of which is totally incorporated herein by reference, there are illustrated multilayered imaging members with a solvent resistant hole blocking layer comprised of a crosslinked electron transport polymer derived from crosslinking a thermally crosslinkable alkoxysilyl, acyloxysilyl or halosilyl-functionalized electron transport polymer with an alkoxysilyl, acyloxysilyl or halosilyl compound, such as alkyltrialkoxysilane, alkyltrihalosilane, alkylacyloxysilane, aminoalkyltrialkoxysilane, and the like, in contact with a supporting substrate and situated between the supporting substrate and a photogenerating layer, and which layer may be comprised of the photogenerating pigments of U.S. Pat. No. 5,482,811, the disclosure of which is totally incorporated herein by reference.
[0005] Illustrated in U.S. Pat. No. 5,493,016, the disclosure of which is totally incorporated herein by reference, are imaging members comprised of a supporting substrate, a photogenerating layer of hydroxygallium phthalocyanine, a charge transport layer, a perylene photogenerating layer, which can be 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-def:6,5,10-d′e′f′)diisoquinoline-10,21-dione, reference U.S. Pat. No. 4,587,189, the disclosure of which is totally incorporated herein by reference.
[0006] 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 the 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-diiminoisoindoline in an amount of from about 1 part to about 10 parts, and preferably about 4 parts of DI3, for each part of gallium chloride that is reacted; hydrolyzing the 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.
[0007] Further, illustrated in U.S. Pat. No. 5,645,965, the disclosure of which is totally incorporated herein by reference, are symmetrical perylene photoconductive members.
[0008] The appropriate components and processes of the above patents may be selected for the present invention in embodiments thereof.