Electrophotographic photoconductor

• US 5,496,671 A
• Filed: 10/17/1994
• Issued: 03/05/1996
• Est. Priority Date: 01/31/1992
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Kawasaki, Yoshiaki, Tamura, Hiroshi, Mishima, Naoshi
• Primary Examiner(s): MARTIN, ROLAND E
• Application Number:
  US08/325,093
• Time in Patent Office: 505 Days
• Field of Search: 430/58, 430/59
• US Class Current: 430/58.05
• CPC Class Codes: G03G 5/047 characterised by the charge-generation layers or charge transport layers G03G5/0433 and G03G5/0436 take precedence
• CPC Class Codes: G03G 5/0542 Polyvinylalcohol, polyallylalcohol; Derivatives thereof, e.g. polyvinylesters, polyvinylethers, polyvinylamines
• CPC Class Codes: G03G 5/056 Polyesters
• CPC Class Codes: G03G 5/142 Inert intermediate layers
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

An electrophotographic photoconductor composed of an electroconductive substrate, and a photoconductive layer consisting of a charge generation layer and a charge transport layer successively formed on the substrate in this order, the charge transport layer containing a carbon-carbon double-bond-containing charge transporting material, and a carbon-carbon double-bond-containing monomer or polymer, which serves as a binder resin, and readily reacts with the above-mentioned charge transporting material by the application of light or heat thereto.

Claims

1. An electrophotographic photoconductor, comprising an electroconductive substrate, and a photoconductive layer, which comprises a charge generation layer and a charge transport layer successively formed on said substrate in this order, said charge transport layer comprising a reaction product of i) a carbon-carbon double-bond-containing charge transport material and ii) a binder resin which comprises an unsaturated polyester, said components i) and ii) reacting with each other by the application of light or heat thereto.

2. The electrophotographic photoconductor as claimed in claim 1, wherein said binder resin further comprises a resin with a molecular weight of 8,000 to 100,000.

3. The electrophotographic photoconductor as claimed in claim 1, wherein said unsaturated polyester has a carbon-carbon double bond on a main chain or a side chain thereof.

4. The electrophotographic photoconductor as claimed in claim 1, wherein a ratio by weight of said carbon-carbon double-bond-containing charge transporting material to said unsaturated polyester is 1-60:

10.

5. The electrophotographic photoconductor as claimed in claim 1, wherein said charge transport layer has a thickness of 10-50 μ

m.

6. The electrophotographic photoconductor as claimed in claim 1, wherein said charge generation layer has a thickness of 0.02-3 μ

m.

7. The electrophotographic photoconductor as claimed in claim 1, further comprising an intermediate layer which is provided between said substrate and said charge generation layer.

8. The electrophotographic photoconductor as claimed in claim 7, wherein said intermediate layer comprises a resin selected from the group consisting of polyamide, polyurethane, silicone resin, phenolic resin, polyvinyl alcohol, polyvinylbutyryl, polyacrylanilide and vinylchloride-vinylacetate-maleic acid copolymer.

9. The electrophotographic photoconductor as claimed in claim 8, wherein said intermediate layer further comprises particles of a pigment selected from the group consisting of SiO₂, Al₂ O₃, ZnO, TiO₂, ZnS and ZrO₂ dispersed in said resin.

10. The electrophotographic photoconductor as claimed in claim 7, wherein said intermediate layer has a thickness of 0.05-20 μ

m.