JPS5950445A - Xerographic material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electrophotographic materials featuring charge transfer agents.

[Background technique]

US Pat. No. 4,150,987 discloses the use of hydrazone compounds as charge transfer agents in electrophotography. However, this patent does not disclose substituted compounds of the present invention.

[Outline of the present invention]

In an electrophotographic material comprising a conductive layer, a charge generation layer, and a charge transfer agent, the charge generation layer has a sq.
It has been found that excellent performance is obtained when the charge transfer agent is a hydrazone compound having the following chemical formula, in which at least one of the positions on the N-phenyl ring has been replaced with id: Ta.

where 1 is hydrogen, an argyl, morpho or piperidino group having up to 4 carbon atoms, and R2 and R3 are hydrogen, an argyl or alkoxy group having up to 4 carbon atoms (7t) ).

It has been found that the presence of at least one substituent at the 1d position of N-phenyl greatly increases the sensitivity of the system. This compound improves mobility and reduces residual voltage at the same time. Furthermore, what's more important is that this ID replacement part is grown.
When the charge generation layer is a squarylium dye, the Babomanos becomes thicker.

41'' (To N1, C) In order to form an organic optical system, many practical front layers must be removed from V. The most important thing to consider is: Point C has the following properties: (a) crystallinity (highly crystalline transfer agents are not practical in practice); 7I opaque charge transfer layer (
c TL )), (b) Spectral absorption ('1
(c) Injection of carriers from CG'L to CTL (charge-generating molecules (d) One mobile molecule in the CTL solid solution intersects with the solid M body of the 1'6f transfer molecule, and (d) one mobile molecule in the CTL solid solution intersects with another. The ability of the carrier to move distinctly and rapidly to the mobile molecule (this determines which intermolecular interactions the CTL involves;
(well filled), jpa (not filled), (e)! environmental stability (including stability against atmospheric vl-2 elements and moisture) and iJ'(f) health' (f) safety (if the transfer agent is a minimally toxic chemical and 7.1:lrj ).

These problems are all solved by using the Y(L i::J generation layer of SQUA IJ IJum dye) and the hydrazone transfer agent in accordance with the present invention. Although the reason for this is not well understood, the substituted hydrazones of the present invention perform extremely well when used with charge generating layers containing squarylium dye.

It is well known that the square IJ IJ um dye bar is used as the charge generation rate in this component force. Most often used d1. Methyl squarylium and hydroxide 7
It is squaryrium.

The preferred hydrazone compound used in the present invention is l”ethylaminobenzaltech-9-(N
-p-methyl-xyphenyl)hydrazone, p-diethylaminobenzaldehyde-(N-p-evogysiphenyl-p-1-lyl)hydrazone, r'-'ethylaminobenzaltepidodi-(,p-1 -lyl)hydrazone, p-diethylaminobenzaldehyde-(N-p
-methoxyphenyl-N-71'l-:,+1/) hydrazone and hypo-i'ethylaminobenzaltehyde-(
11-) Contains IJ-N-phenyl)hydrazone.

The following examples are given for illustrative purposes only and should not be construed as limiting the invention.

It will be obvious that many changes can be made without departing from the spirit of the invention.

〔Example〕

Preferred embodiments of the electrophotographic device of the present invention are as follows.

24y polycarbonate was dissolved in 14y tetrahydrofuran and 15y toluene.

Add to this 2.0y of transfer material (p-diethylaminobenzaldehyde di-(p-tolyl))hydrazo7 (9+
-- Rule 9 has been added. This is a hydroxyl compound on an aluminized poly(ethylene terephthalate) substrate.
coated with a charge generating layer of squarylium. The thickness of the applied charge transfer layer is approximately 20 microns.

Ditol as a charge transfer agent was replaced with DEH' (p-jethylaminobenzaldehyde di(N- The test results compared with phenyl)hydrazone are as follows.

Jill +,,) E ■1 Shikikin Y; ”6: Pressure
-107-150 where exposure C voltage is the residual 'tQ: pressure left on the light guide finish after exposure to light.

It will be clear from the above discussion that the charge transport layer of the present invention is significantly superior to layers of prior art technology.

Applicant International Business Machines Corporation Representative Patent Attorney Hitoshi Yamamoto (1 other person)

Claims (1)

[Scope of Claims] An electrophotographic material comprising a charge generating layer of a square dye and a charge transfer agent, wherein the charge transfer agent has at least one position of the N-phenyl ring. 16 is substituted and is a hydrazone compound having the following chemical formula: where R111,i is hydrogen, an alkyl group having up to 4 carbon atoms, a morpholino group or a piperidino group; ,
R2 and R3 are hydrogen, an alkyl group or an alkoxy group having up to 4 carbon atoms.