Nova Patents
EP2391925B1

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Abstract

This record has no abstract on file.

EP2391925B1, drawing sheet 1
Sheet 1 of 761

Term

3.3 yearsleft in the term

Expires 29 January 2030.

  1. Priority
  2. Filed
  3. Granted
  4. Today
  5. Expires

11 claims: 1 independent, 10 dependent

  1. 1
    An electrophotographic photosensitive member comprising a support and a photosensitive layer formed on the support, wherein the photosensitive layer contains a copolymer having a repeating structural unit represented by the following formula (1) and a repeating structural unit represented by the following formula (2) or (3) :(̵Z 1 -A-Z 2 -E 1 )̵     (1)         (̵Z 3 -A-Z 4 -W 2 -B 2 -W 2 )̵     (2)         (̵Z 5 -B 3 -Z 6 -E 4 )̵     (3) where, in the formulas (1), (2) and (3);Z 1 to Z 6 each independently represent a single bond, an alkylene group, an arylene group, or an arylene group substituted with an alkyl group;E 1 and E 4 each represent a divalent group represented by -W 1 -B 1 -W 1 - and -W 3 -B 4 -W 3 -, respectively, or a divalent group represented by the following formula (E11) and (E41), respectively: wherein X 1 and X 4 each independently represent a tetravalent group formed by removing four hydrogen atoms from a cyclic hydrocarbon;W 1 to W 3 each independently represent a single bond, a urethane linkage, a urea linkage or an imide linkage;A represents a divalent group represented by any of the following formulas (A-1) to (A-8): where, in the formulas (A-1) to (A-8);R 101 to R 104 and R 201 to R 208 each independently represent a hydrogen atom, an aryl group, an aryl group substituted with a halogen atom, nitro group, cyano group, alkyl group or alkyl halide group, an alkyl group, or a cyano group, or represent a bonding site;and R 105 , R 106 , R 209 and R 210 each independently represent a hydrogen atom, an aryl group, an aryl group substituted with an alkyl group or halogen atom, or an alkyl group, or represent a bonding site;provided that any two of R 101 to R 106 are bonding sites;and provided that any two of R 201 to R 210 are bonding sites;R 301 to R 308 , R 401 to R 406 , R 501 to R 508 , and R 801 to R 808 each independently represent a hydrogen atom, an aryl group, an aryl group substituted with a halogen atom, nitro group, cyano group, alkyl group or alkyl halide group, an alkyl group, a cyano group, or a nitro group, or represent a bonding site;R 309 , R 407 , R 509 , and R 510 each independently represent an oxygen atom or a dicyanomethylene group;and R 310 and R 311 each independently represent a carbon atom or a nitrogen atom, and, in the case of the nitrogen atom, R 304 and R 305 are not present;provided that any two of R 301 to R 308 are bonding sites;and provided that any two of R 401 to R 406 are bonding sites;and provided that any two of R 801 to R 808 are bonding sites;and R 511 and R 512 each independently represent a carbon atom or a nitrogen atom, and, in the case of the nitrogen atom, R 501 and R 505 are not present;provided that any two of R 501 to R 508 are bonding sites;R 601 to R 608 and R 701 to R 713 each independently represent a hydrogen atom, an aryl group, an aryl group substituted with a halogen atom, nitro group, cyano group, alkyl group or alkyl halide group, an alkyl group, a cyano group, a nitro group, or a carboxylate group, or represent a bonding site;R 610 and R 611 each independently represent a carbon atom or a nitrogen atom, and, in the case of the nitrogen atom, R 604 and R 605 are not present;and R 609 represents a dicyanomethylene group;provided that any two of R 601 to R 608 are bonding sites;R 714 and R 715 each independently represent a carbon atom or a nitrogen atom, and, in the case of the nitrogen atom, R 704 and R 705 are not present;provided that any two of R 701 to R 713 are bonding sites;and B 1 and B 4 each independently represent an arylene group, an alkylene group, an alkarylene group, an arylene group substituted with an alkyl group, halogen atom, cyano group or nitro group, an alkylene group substituted with a halogen atom, cyano group or nitro group, an alkarylene group substituted with an alkyl group, halogen atom, cyano group or nitro group, an arylene group interrupted by an ether or sulfonyl, or an alkylene group interrupted by an ether;and B 2 and B 3 each independently represent an arylene group substituted with a carboxyl group only, an arylene group substituted with a carboxyl group and an alkyl group only, or an alkylene group substituted with a carboxyl group only.
  2. 10
    A process cartridge which integrally supports the electrophotographic photosensitive member according to any one of claims 1 to 9 and at least one device selected from the group consisting of a charging device, a developing device, a transfer device and a cleaning device, and is detachably mountable to the main body of an electrophotographic apparatus.
  3. 11
    An electrophotographic apparatus comprising the electrophotographic photosensitive member according to any one of claims 1 to 9, a charging device, an exposure device, a developing device and a transfer device.
Independent claims3