Electrophotographic photoconductor

• US 5,387,487 A
• Filed: 08/28/1992
• Issued: 02/07/1995
• Est. Priority Date: 08/30/1991
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Shimoda, Masakatsu, Taniucchi, Masahiro, Suzuki, Tetsuro, Kojima, Akio, Shoshi, Masayuki, Yoshikawa, Masao
• Primary Examiner(s): Rodee, Christopher D.
• Application Number:
  US07/936,773
• Time in Patent Office: 893 Days
• Field of Search: 430/58, 430/56, 430/70
• US Class Current: 430/58.35
• CPC Class Codes: C07C 255/34 with cyano groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by unsaturated carbon chains
• CPC Class Codes: C07C 255/35 the carbon skeleton being further substituted by halogen atoms, or by nitro or nitroso groups
• CPC Class Codes: C07C 255/37 the carbon skeleton being further substituted by etherified hydroxy groups
• CPC Class Codes: C07C 2603/26 Phenanthrenes; Hydrogenated phenanthrenes
• CPC Class Codes: C07C 2603/50 Pyrenes; Hydrogenated pyrenes
• CPC Class Codes: C07D 405/06 linked by a carbon chain containing only aliphatic carbon atoms
• CPC Class Codes: G03G 5/0612 containing nitrogen
• CPC Class Codes: G03G 5/0629 containing one hetero atom
• CPC Class Codes: G03G 5/0637 containing one hetero atom

Abstract

An electrophotographic photoconductor is composed of an electroconductive support, and a photoconductive layer formed on the electroconductive support, which contains a charge generating material and a charge transporting material consisting of an α-cyanostilbene compound of formula (I): ##STR1## wherein R¹ and R² each represent a phenyl group, a polycyclic aromatic group selected from the group consisting of a naphthyl group, an anthracenyl group, a phenanthrenyl group, and a pyrenyl group, or a heterocyclic group selected from the group consisting of a pyridyl group, a furanyl group, and a quinolyl group.

Claims

1. An electrophotographic photoconductor comprising:

i) an electroconductive support; and

ii) a photoconductive layer formed on said electroconductive support comprising;

a) a charge generating material; and

b) a charge transport material consisting of an α

-cyano compound of the formula (I);

##STR363## wherein R¹ is ##STR364## in which R³ is selected from the group consisting of a methyl group, a trifluoromethyl group and chlorine, and R² is selected from the group consisting of ##STR365##

2. The electrophotographic photoconductor of claim 1, wherein said charge transport layer has a thickness of 5 to 50 μ

m.

3. The electrophotographic photoconductor of claim 1, wherein said charge generation layer has a thickness of 0.1 to 10 μ

m.

4. The electrophotographic photoconductor of claim 1, wherein said charge generation material is selected from the group consisting of amorphous selenium, trigonal-system selenium, selenium-arsenic alloy, selenium-tellurium alloy, cadmium sulfide, cadmium selenide, cadmium sulfoselenide, mercury sulfide, lead oxide, lead sulfide, amorphous silicone, bisazo dye, polyazo dye, triarylmethane dye, triazine dye, oxazine dye, xanthene dye, cyanine dye, styryl dye, pyrylium dye, quinacridone dye, indigo dye, perylene dye, polycyclic quinone dye, bisbenzimidazole dye, indanthrone dye, squarylium dye, anthraquinone dye and phthalocyanine dye.

5. The electrophotographic photoconductor of claim 1, further comprising a protective layer provided on said photoconductive layer.

6. The electrophotographic photoconductor of claim 1, further comprising an intermediate layer provided between said electroconductive support and said photoconductive layer.

7. The electrophotographic photoconductor of claim 6, wherein said intermediate layer has a thickness of 1 μ

m or less.