Mixed substance of triphenylamine dimers

• US 6,811,940 B2
• Filed: 09/19/2002
• Issued: 11/02/2004
• Est. Priority Date: 09/19/2001
• Status: Expired due to Fees

• Current Assignee: Orient Chemical Industries Ltd
• Original Assignee: Orient Chemical Industries Ltd
• Inventors: Kita, Yoshio, Yamasaki, Yasuhiro
• Primary Examiner(s): Dote, Janis L.
• Application Number:
  US10/246,739
• Publication Number:
  US 20030064308A1
• Time in Patent Office: 775 Days
• Field of Search: 430/58.8, 430/59.4, 430/59.5, 430/133, 430/73, 252/500
• US Class Current: 430/58.8
• CPC Class Codes: C07C 211/54 having amino groups bound to two or three six-membered aromatic rings
• CPC Class Codes: G03G 5/05 Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
• CPC Class Codes: G03G 5/0517 comprising one or more cyclic groups consisting of carbon-atoms only
• CPC Class Codes: G03G 5/061443 benzidine
• CPC Class Codes: G03G 5/0696 Phthalocyanines

Abstract

The present invention intends to provide a TPD derivative being excellent in electric properties as a compound due to its extremely less content of impurities (TPD analogues) as well as being excellent in film-forming property due to its low crystallinity. The TPD derivative is a mixed substance of triphenylamine dimers which contains at least the compound represented by formula B:

Claims

1. A mixed substance of triphenylamine dimers which comprises at least the compound represented by formula

5. A charge-transporting material for a layered electrophotographic photoreceptor which comprises the mixed substance of triphenylamine dimers according to any one of claims 1 to 4.

6. A charge-transporting layer for a layered electrophotographic photoreceptor which comprises the mixed substance of triphenylamine dimers according to any one of claims 1 to 4 and a binder resin.

7. A process for forming a charge-transporting layer for a layered electrophotographic photoreceptor comprising the steps of:

dissolving the mixed substance of triphenylamine dimers according to any one of claims 1 to 4 in a solvent together with a binding resin;

applying the resulting solution uniformly onto a charge-generating layer, and

drying the resulting coated layer.

8. A layered electrophotographic photoreceptor which comprises a conductive support, a charge-generating layer and a charge-transporting layer, wherein the charge-transporting layer comprises the mixed substance of triphenylamine dimers according to any one of claims 1 to 4 as a charge-transporting material.

9. The layered electrophotographic photoreceptor according to claim 8, wherein the charge-generating layer comprises, as a charge-generating material, a phthalocyanine compound selected from the group consisting of titanyl phthalocyanine, μ

-oxo-aluminum phthalocyanine dimer and μ

-oxo-gallium phthalocyanine dimer.

2. A mixed substance of triphenylamine dimers which comprises the compound represented by formula A

the compound represented by formula B

and the compound represented by formula C

3. A mixed substance of triphenylamine dimers which is obtained by allowing a mixture of 3-methyldiphenylamine and 4-methyldiphenylamine to react with 4,4′

-dihalobiphenyl.

4. The mixed substance of triphenylamine dimers according to claim 3, wherein the 3-methyldiphenylamine and the 4-methyldiphenylamine are mixed in a molar ratio of 75:

25 to 95;

5.