Electrophotographic photoreceptor, electrophotographic cartridge, image forming apparatus, and charge transport substance

Patent metadata

Field	Value
Publication number	US-9791791-B2
Application number	US-201615211386-A
Country	US
Kind code	B2
Filing date	Jul 15, 2016
Priority date	Jan 21, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

The present invention relates to an electrophotographic photoreceptor comprising a conductive support and a photosensitive layer disposed thereover, wherein the photosensitive layer comprises a compound represented by general formula (1) and palladium, the photosensitive layer having a palladium content of 0.01-50 ppm.

First claim

The invention claimed is:

1. A charge transport substance, comprising:
a compound and
palladium,
wherein a palladium content is 0.01-150 ppm, and
the compound is of formula (1):

wherein Ar 1 to Ar 5 each independently represent an aryl group which optionally has an alkyl or alkoxy group,
Ar 6 to Ar 9 each independently represent a 1,4-phenylene group which optionally has a substituent, and
m and n each independently represent an integer of 1-2.

2. An electrophotographic photoreceptor, comprising:
a conductive support and,
a photosensitive layer disposed thereover, the photosensitive layer comprising a charge transport substance,
wherein the charge transport substance comprises a compound and palladium, the charge transport substance having a palladium content of 0.01-150 ppm, and
the compound is of formula (1):

wherein Ar 1 to Ar 5 each independently represent an aryl group which optionally has a substituent.
Ar 6 to Ar 9 each independently represent a 1,4-phenylene group which optionally has a substituent, and
m and n each independently represent an integer of 1 to 3.

3. The electrophotographic photoreceptor according to claim 2 , wherein the photosensitive layer comprises a binder resin, the binder resin having a viscosity-average molecular weight of 40,000-100,000.

4. The electrophotographic photoreceptor according to claim 2 wherein:
a content of a residual halogenated solvent in the photosensitive layer is 1.0 mg/g or less, and
a content of a residual halogen-free solvent in the photosensitive layer is 0.05-20.0 mg/g.

5. The electrophotographic photoreceptor according to claim 2 , wherein the compound of formula (1) is present in the photosensitive layer in an amount of 20-50 parts by mass per 100 parts by mass of a binder resin in the photosensitive layer.

6. The electrophotographic photoreceptor according to claim 2 , wherein in formula (1),
Ar 1 to Ar 5 each independently are an aryl group which optionally has an alkyl or alkoxy group,
Ar 6 to Ar 9 each independently are a 1,4-phenylene group which optionally has a substituent, and
m and n are 1.

7. The electrophotographic photoreceptor according to claim 2 , wherein the compound of formula (1) has been purified with an adsorbent.

8. The electrophotographic photoreceptor according to claim 2 , wherein the electrophotographic photoreceptor is suitable for use in a full-color image forming apparatus.

9. An electrophotographic cartridge, comprising:
the electrophotographic photoreceptor according to claim 2 ; and
at least one selected from the group consisting of
a charging device configured to charge the electrophotographic photoreceptor,
an exposure device configured to expose the charged electrophotographic photoreceptor to light to form an electrostatic latent image, and
a developing device configured to develop the electrostatic latent image formed in the surface of the electrophotographic photoreceptor.

10. A full-color image forming apparatus, comprising:
the electrophotographic photoreceptor according to claim 2 ;
a charging device configured to charge the electrophotographic photoreceptor;
an exposure device configured to expose charged electrophotographic photoreceptor to light to form electrostatic latent image; and
a developing device configured to develop the electrostatic latent image formed in the surface of the electrophotographic photoreceptor.

11. An electrophotographic photoreceptor, comprising:
a conductive support and
a photosensitive layer disposed thereover,
wherein the photosensitive layer comprises a compound and palladium, the photosensitive layer having a palladium content of 0.01-50 ppm, and
the compound is of formula (1):

wherein Ar 1 to Ar 5 each independently represent an aryl group which optionally has a substituent,
Ar 6 to Ar 9 each independently represent a 1,4-phenylene group which optionally has a substituent, and
m and n each independently represent an integer of 1 to 3.

12. The electrophotographic photoreceptor according to claim 11 , wherein the photosensitive layer comprises a binder resin, the binder resin having a viscosity-average molecular weight of 40,000-100,000.

13. The electrophotographic photoreceptor according to claim 11 , wherein:
a content of a residual halogenated solvent in the photosensitive layer is 1.0 mg/g or less, and
a content of a residual halogen-free solvent in the photosensitive layer is 0.05-20.0 mg/g.

14. The electrophotographic photoreceptor according to claim 11 , wherein the compound of formula (1) is present in the photosensitive layer in an amount of 20-50 parts by mass per 100 parts by mass of a binder resin in the photosensitive layer.

15. The electrophotographic photoreceptor according to claim 11 , wherein in formula (1),
Ar 1 to Ar 5 each independently are an aryl group which optionally has an alkyl or alkoxy group,
Ar 6 to Ar 9 each independently are a 1,4-phenylene group which optionally has a substituent, and
m and n are 1.

16. The electrophotographic photoreceptor according to claim 11 , wherein the photosensitive layer comprises a polyarylate resin or a polycarbonate resin as a binder resin.

17. The electrophotographic photoreceptor according to claim 11 , wherein the compound of formula (1) has been purified with an adsorbent.

18. The electrophotographic photoreceptor according to claim 11 , wherein the electrophotographic photoreceptor is suitable for use in a full-color image forming apparatus.

19. An electrophotographic cartridge, comprising:
the electrophotographic photoreceptor according to claim 11 ; and
at least one selected from the group consisting of
a charging device configured to charge the electrophotographic photoreceptor,
an exposure device configured to expose the charged electrophotographic photoreceptor to light to form an electrostatic latent image, and
a developing device configured to develop the electrostatic latent image formed in the surface of the electrophotographic photoreceptor.

20. A full-color image following apparatus, comprising:
the electrophotographic photoreceptor according to claim 11 ;
a charging device configured to charge the electrophotographic photoreceptor;
an exposure device configured to expose the charged electrophotographic photoreceptor to light to form an electrostatic latent image; and
a developing device configured to develop the electrostatic latent image formed in the surface of the electrophotographic photoreceptor.

Assignees

• Mitsubishi Chem Corp

Inventors

• Mizushima Tadashi
• Wada Mitsuo
• Nagao Yuka

Classifications

• G03G5/0433 Primary

  all layers being inorganic · CPC title

• G03G5/0596

  Macromolecular compounds characterised by their physical properties · CPC title

• G03G5/0662 Primary

  containing metal elements · CPC title

• G03G15/75

  Details relating to xerographic drum, band or plate, e.g. replacing, testing (electrographic recording members per se G03G5/00) · CPC title

• G03G2215/00957

  Compositions · CPC title