ESTER POLYMER, PRODUCTION THEREOF, AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR MADE THEREFROM

Title:

ESTER POLYMER, PRODUCTION THEREOF, AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR MADE THEREFROM

Document Type and Number:

WIPO Patent Application WO/1993/022361

Kind Code:

A1

Abstract:

An ester polymer composed of solely the following repeating units (I): -(-W-X-O-CO-)- or both of the repeating units (I) and (II) and having a reduced viscosity [$g(h)¿sp?/C] of 0.2-10.0 dl/g as measured with a solution thereof in methylene chloride at a concentration of 0.5 g/dl at 20 °C; a process for producing the ester polymer by the reaction of a dihydric phenol (III): HO-X-OH or a mixture of dihydric phenols (III) and (IV) with a carbonate-forming compound or a dibasic acid; and an electrophotographic photoreceptor comprising a photosensitive layer provided on a conductive support, wherein the ester polymer is used as a charge transport substance or a binder resin in the photosensitive layer. In said formulae, W represents -O- or a single bond; X represents a divalent group derived from a dihydric phenol containing a hydrazine structure; R?25¿ and R?26¿ represent each halogen, alkyl, cycloalkyl or aryl; m and n represents each an integer of 0 to 4; and Y represents a single bond, -O-, -S-, -SO-, -SO¿2?-, -CR?27¿R?28¿-, 1,1-cycloalkylene or a $g(a),$g(v)-alkylene.

Inventors:

NAGAO TOMOHIRO (JP)
SAKAMOTO SHUJI (JP)
MORISHITA HIRONOBU (JP)
MIYAMOTO HIDEYUKI (JP)

Application Number:

PCT/JP1993/000576

Publication Date:

November 11, 1993

Filing Date:

April 30, 1993

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
NAGAO TOMOHIRO (JP)
SAKAMOTO SHUJI (JP)
MORISHITA HIRONOBU (JP)
MIYAMOTO HIDEYUKI (JP)

International Classes:

C08G63/64; C08G63/685; C08G64/12; G03G5/05; G03G5/07; (IPC1-7): C08G63/00; C08G64/12; G03G5/06

Foreign References:

JPS649964A	1989-01-13
JPH0431404A	1992-02-03
JPH01273046A	1989-10-31

Other References: