Image-holding member, and electrophotographic apparatus, apparatus unit, and facsimile machine employing the same

• US 5,283,142 A
• Filed: 02/19/1992
• Issued: 02/01/1994
• Est. Priority Date: 02/21/1991
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ogawa, Noriyoshi, Aoki, Katsumi, Fujimura, Naoto, Sakai, Kiyoshi, Kanayama, Satoshi, Ohtani, Noriko, Mayama, Shinya
• Primary Examiner(s): MARTIN, ROLAND E
• Application Number:
  US07/836,718
• Time in Patent Office: 713 Days
• Field of Search: 430/58, 430/66, 430/67, 430/96, 355/211, 358/300, 358/304
• US Class Current: 430/59.6
• CPC Class Codes: C08G 64/186 containing polysiloxane sequences
• CPC Class Codes: C08G 77/448 containing polycarbonate sequences
• CPC Class Codes: G03G 5/0564 Polycarbonates
• CPC Class Codes: G03G 5/0578 Polycondensates comprising silicon atoms in the main chain
• CPC Class Codes: G03G 5/0582 Polycondensates comprising sulfur atoms in the main chain
• CPC Class Codes: G03G 5/147 Cover layers

Abstract

The present invention provides an image-holding member which comprises an electroconductive support and a resin layer formed on the support, wherein the surface layer of the image-holding member contains a copolymer having the structure units represented by the formulas [I] and [II]: ##STR1## where A is a linear, branched or cyclic alkylidene group of 1 to 10 carbon atoms, an aryl-substituted alkylidene group, arylene-dialkylidene group, --O--, --S--, --CO--, --SO--, or --SO₂ --; and R₁, R₂, R₃, and R₄ are respectively hydrogen, halogen, or an alkyl or alkenyl group of 1 to 4 carbons; ##STR2## where R₅ is an alkylene or alkylidene group of 2 to 6 carbons; R₆ and R₇ are respectively an alkyl group of 1 to 3 carbons, a phenyl or substituted phenyl group; and n is an integer of from 1 to 200, and the copolymer containing the structure unit of the formula [II] in an amount of from 0.1 to 50% by weight Of the total weight of the copolymer.

Claims

1. An electrophotographic image-holding member, comprising an electroconductive support and a resin layer formed on the support, the surface layer of the image-holding member containing a copolymer having the structure units represented by the formulas [I] and [II]:

##STR34## wherein A is a linear, branched or cyclic alkylidene group of 1 to 10 carbon atoms, an aryl-substituted alkylidene group, arylene-dialkylidene group, --O--, --S--, --CO--, --SO--, or --SO₂ --; and

R₁, R₂, R₃, and R₄ are respectively hydrogen, halogen, or an alkyl or alkenyl group of 1 to 4 carbons;

##STR35## where R₅ is an alkylene or alkylidene group of 2 to 6 carbons;

R₆ and R₇ are respectively an alkyl group of 1 to 3 carbons, a phenyl or substituted phenyl group; and

n is an integer of from 1 to 200, and the copolymer containing the structure unit of the formula [II] in an amount of from 0.1% to 50% by weight of the total weight of the copolymer.

2. An electrophotographic image-holding member according to claim 1, wherein the structural unit of the formula [I] is represented by the formula below:

##STR36##

3. An electrophotographic image-holding member according to claim 1, wherein the structural unit of the formula [I] is represented by the formula below:

##STR37##

4. An image-holding member according to claim 1, wherein the structural unit of the formula [I] is represented by the formula below:

##STR38##

5. An electrophotographic image-holding member according to claim 1, wherein the structural unit of the formula [I] is represented by the formula below:

##STR39##

6. An electrophotographic image-holding member according to claim 1, wherein the structural unit of the formula [I] is represented by the formula below:

##STR40##

7. An electrophotographic image-holding member according to claim 1, wherein the group R₅ is selected from an ethylene group, a propylene group, and an isopropylene group.

8. An electrophotographic image-holding member according to claim 1, wherein the surface layer is a photosensitive layer.

9. An electrophotographic image-holding member according to claim 8, wherein the photosensitive layer comprises a charge-generating layer and a charge-transporting layer.

10. An electrophotographic image-holding member according to claim 9, wherein the charge-transporting layer is the surface layer.

11. An electrophotographic image-holding member according to claim 9, wherein the charge-generating layer is the surface layer.

12. An electrophotographic image-holding member according to claim 8, wherein the photosensitive member is a single layer.

13. An electrophotographic image-holding member according to claim 1, wherein the surface layer is a protecting layer.

14. An electrophotographic image-holding member according to claim 1, wherein the image-holding member has a subbing layer between the electroconductive support and the resin layer.

15. An electrophotographic image-holding member according to claim 1, wherein the image-holding member has an electroconductive layer between the electroconductive support and the resin layer.

16. An electrophotographic apparatus, comprising an electrophotographic image-holding member, a means for forming an electrostatic latent image, a means for developing the electrostatic latent image formed, and a means for transferring a developed image onto a transfer-receiving material;

said image-holding member comprising an electroconductive support and a resin layer formed on the support, the surface layer of the image-holding member being formed from a copolymer having the structure units represented by the formulas [I] and [II];

##STR41## where A is a linear, branched or cyclic alkylidene group of 1 to 10 carbon atoms, an aryl-substituted alkylidene group, arylene-dialkylidene group, --O--, --S--, --CO--, --SO--, or --SO₂ --; and

R₁, R₂, R₃, and R₄ are respectively hydrogen, halogen, or an alkyl or alkenyl group of 1 to 4 carbons;

##STR42## where R₅ is an alkylene or alkylidene group of 2 to 6 carbons;

R₆ and R₇ are respectively an alkyl group of 1 to 3 carbons, a phenyl or substituted phenyl group; and

n is an integer of from 1 to 200, and the copolymer containing the structure unit of the formula [II] is provided in an amount of from 0.1 to 50% by weight of the total weight of the copolymer.

17. A device unit, comprising an electrophotographic image-holding member, a charging means, and a cleaning means;

said image-holding member comprising an electroconductive support and a resin layer formed on the support, the surface layer of the image-holding member being formed from a copolymer having the structure units represented by the formulas [I] and [II];

##STR43## where A is a linear, branched or cyclic alkylidene group of 1 to 10 carbon atoms, an aryl-substituted alkylidene group, arylene-dialkylidene group, --O--, --S--, --CO--, --SO--, or --SO₂ --; and

R₁, R₂, R₃, and R₄ are respectively hydrogen, halogen, or an alkyl or alkenyl group of 1 to 4 carbons;

##STR44## where R₅ is an alkylene or alkylidene group of 2 to 6 carbons;

R₆ and R₇ are respectively an alkyl group of 1 to 3 carbons, a phenyl or substituted phenyl group; and

n is an integer of from 1 to 200, and the copolymer containing the structure unit of the formula [II] is provided in an amount of from 0.1 to 50% by weight of the total weight of the copolymer, said unit holding integrally the image-holding member, the charging means, and the cleaning means, and being removable from the main body of an electrophotographic apparatus.

18. A device unit according to claim 17, wherein the unit comprises a developing means.

19. A facsimile machine, comprising an electrophotographs apparatus and an information-receiving means for receiving image information from a remote terminal:

said electrophotographic apparatus comprising an electrophotographic image-holding member, said image-holding member comprising an electroconductive support and a resin layer formed on the support, the surface layer of the image-holding member being formed from a copolymer having the structure units represented by the formulas [I] and [II];

##STR45## where A is a linear, branched or cyclic alkylidene group of 1 to 10 carbon atoms, an aryl-substituted alkylidene group, arylene-dialkylidene group, --O--, --S--, --CO--, --SO--, or --SO₂ --; and

R₁, R₂, R₃, and R₄ are respectively hydrogen, halogen, or an alkyl or alkenyl group of 1 to 4 carbons;

##STR46## where R₅ is an alkylene or alkylidene group of 2 to 6 carbons;

R₆ and R₇ are respectively an alkyl group of 1 to 3 carbons, a phenyl or substituted phenyl group and n is an integer of from 1 to 200, and the copolymer containing the structure unit of the formula [II] is provided in an amount of from 0.1 to 50% by weight of the total weight of the copolymer.