Claims
- 1. In an electrophotographic plate comprising an electroconductive layer, a charge generating layer containing one or more organic pigments for charge generation and a charge transport layer containing charge transport material having functions of charge maintenance and charge transport, the improvement wherein a silane coupling agent is present in the charge generating layer in an amount of 0.5 to 40% by weight based on the weight of the charge generating layer.
- 2. An electrophotographic plate according to claim 1, wherein a silane coupling agent is also present in the charge transport layer in an amount of 0.05 to 30% by weight based on the weight of the charge transport layer.
- 3. An electrophotographic plate according to claim 1, wherein a silane coupling agent is also present at the interface of the charge generating layer and the charge transport layer in an amount of 10.sup.-4 mg/cm.sup.2 to 10.sup.2 mg/cm.sup.2.
- 4. An electrophotographic plate according to claim 1, wherein the silane coupling agent is an aminosilane.
- 5. An electrophotographic plate according to claim 1, wherein the silane coupling agent is a mercaptosilane.
- 6. An electrophotographic plate according to claim 4, wherein the aminosilane is N-.beta.-(aminoethyl)-.gamma.-aminopropyltrimethoxysilane.
- 7. An electrophotographic plate according to claim 5, wherein the mercaptosilane is .gamma.-mercaptopropyltrimethoxysilane.
- 8. An electrophotographic plate according to claim 1, wherein the charge generating layer and/or the charge transport layer contains a cyanine dye base of the formula: ##STR8## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an acyl group, a hydroxyl group, a phenyl group or a substituted phenyl group, and/or a styryl dye base of the formula: ##STR9## wherein R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are independently a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an acyl group, a hydroxyl group, a phenyl group, or a substituted phenyl group; and R.sub.11 and R.sub.12 are independently a hydrogen atom or an alkyl group.
- 9. An electrophotographic plate according to claim 8, wherein the charge generating layer contains the silane coupling agent and the cyanine dye base of the formula (I) and/or the styryl dye base of the formula (II) in a total amount of 40% by weight or less.
- 10. An electrophotographic plate according to claim 8, wherein the charge transport layer contains a silane coupling agent in an amount of 0.05% by weight, and the silane coupling agent and the cyanine dye base of the formula (I) and/or the styryl dye base of the formula (II) in a total amount of 30% by weight or less.
- 11. An electrophotographic plate comprising an electroconductive layer, a charge generating layer consisting essentially of organic material including at least one organic pigment for charge generation and a polymeric binder and a charge transport layer having functions of charge maintenance and charge transport and consisting essentially of organic material including high or low molecular weight charge transporting compounds and a polymeric binder; a silane coupling agent being present in the charge generating layer in an amount of 0.5 to 40% by weight based on the weight of the charge generating layer.
- 12. An electrophotographic plate according to claim 11, wherein the silane coupling agent is selected from the group consisting of an amino silane and a mercapto silane.
- 13. An electrophotographic plate according to claim 12, wherein the charge generating layer and/or the charge transport layer contains a cyanine dye base of the formula: ##STR10## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an acyl group, a hydroxyl group, a phenyl group or a substituted phenyl group, and/or a styryl dye base of the formula: ##STR11## wherein R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are independently a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an acyl group, a hydroxyl group, a phenyl group, or a substituted phenyl group; and R.sub.11 and R.sub.12 are independently a hydrogen atom or an alkyl group.
- 14. An electrophotographic plate according to claim 13, wherein the charge generating layer contains the silane coupling agent and the cyanine dye base of the formula (I) and/or the styryl dye base of the formula (II) in a total amount of 40% by weight or less.
- 15. An electrophotographic plate according to claim 13, wherein the charge transport layer contains a silane coupling agent in an amount of 0.05% by weight, and the silane coupling agent and the cyanine dye base of the formula (I) and/or the styryl dye base of the formula (II) in a total amount of 30% by weight or less.
- 16. An electrophotographic plate according to claim 11, wherein said charge generating layer and said charge transport layer are each formed without the addition of inorganic photoconductive substances.
- 17. An electrophotographic plate according to claim 11, wherein said charge generating layer has a thickness of 0.01 to 10 .mu.m and the charge transport layer has a thickness of 5 to 50 .mu.m.
- 18. An electrophotographic plate according to claim 1, wherein the charge generating layer has a thickness of 0.1 to 10 .mu.m and the charge transport layer has a thickness of 5 to 50 .mu.m.
Priority Claims (2)
Number |
Date |
Country |
Kind |
56-150095 |
Sep 1981 |
JPX |
|
57-82235 |
May 1982 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 420,888, filed Sept. 21, 1982 now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4148637 |
Kubota et al. |
Oct 1979 |
|
4203764 |
Tosaka et al. |
May 1980 |
|
4250240 |
Shimada et al. |
Feb 1981 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
420888 |
Sep 1982 |
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