Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

An electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;

• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing a polyhydroxymethylbisphenol monomer having a structure represented by the following Formula (1):
• wherein X11 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R11 to R14 each independently represent a hydroxymethyl group, a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms other than the hydroxymethyl group, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms, provided that at least two of the R11 to R14 are each a hydroxymethyl group.

An electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;

• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing a polyhydroxymethylbisphenol oligomer having a structure in which a bisphenol monomer having a structure represented by the following Formula (2) has been condensed through a methylene group:
• wherein X21 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R21 to R24 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms.

A process cartridge comprising an electrophotographic photosensitive member and at least one means selected from the group consisting of a charging means, a developing means, a transfer means and a cleaning means which are integrally supported, and being detachably mountable to the main body of an electrophotographic apparatus;

• the electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;
• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing
• (i) a polyhydroxymethylbisphenol monomer having a structure represented by the following Formula (1):
• wherein X11 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R11 to R14 each independently represent a hydroxymethyl group, a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms other than the hydroxymethyl group, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms, provided that at least two of the R11 to R14 are each a hydroxymethyl group or (ii) a polyhydroxymethylbisphenol oligomer having a structure in which a bisphenol monomer having a structure represented by the following Formula (2) has been condensed through a methylene group:
• wherein X21 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R21 to R24 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms.

An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging means, an exposure means, a developing means and a transfer means;

• the electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;
• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing
• (i) a polyhydroxymethylbisphenol monomer having a structure represented by the following Formula (1):
• wherein X11 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R11 to R14 each independently represent a hydroxymethyl group, a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms other than the hydroxymethyl group, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms, provided that at least two of the R11 to R14 are each a hydroxymethyl group or
• (ii) a polyhydroxymethylbisphenol oligomer having a structure in which a bisphenol monomer having a structure represented by the following Formula (2) has been condensed through a methylene group:
• wherein X21 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R21 to R24 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms.

A process cartridge comprising an electrophotographic photosensitive member and at least one means selected from the group consisting of a charging means, a developing means, a transfer means and a cleaning means which are integrally supported, and being detachably mountable to the main body of an electrophotographic apparatus;

• the electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;
• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing a polyhydroxymethylbisphenol monomer having a structure represented by the following Formula (1):
• wherein X11 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided hat a case in which both the R01 and R02 are substituted or, unsubstituted phenyl groups is excluded;
• and R11 to R14 each independently represent a hydroxymethyl group, a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms other than the hydroxymethyl group, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms, provided that at least two of the R11 to R14 are each a hydroxymethyl group.

An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging means, an exposure means, a developing means and a transfer means;

• the electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;
• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing a polyhydroxymethylbisphenol monomer having a structure represented by the following Formula (1):
• wherein X11 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R11 to R14 each independently represent a hydroxymethyl group, a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms other than the hydroxymethyl group, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms, provided that at least two of the R11 to R14 are each a hydroxymethyl group.

A process cartridge comprising an electrophotographic photosensitive member and at least one means selected from the group consisting of a charging means, a developing means, a transfer means and a cleaning means which are integrally supported, and being detachably mountable to the main body of an electrophotographic apparatus;

• the electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;
• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing polyhydroxymethylbisphenol oligomer having a structure in which a bisphenol monomer having a structure represented by the following Formula (2) has been condensed through a methylene group:
• wherein X21 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R21 to R24 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms.

An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging means, an exposure means, a developing means and a transfer means;

• the electrophotographic photosensitive member comprising a support and provided thereon a photosensitive layer, wherein;
• said electrophotographic photosensitive member has a surface layer containing:
• at least one of a charge-transporting material and conductive particles;
• and
• a polymer obtained by polymerizing a polyhydroxymethylbisphenol oligomer having a structure in which a bisphenol monomer having a structure represented by the following Formula (2) has been condensed through a methylene group:
• wherein X21 represents a single bond, a carbonyl group, an ether group, a thioether group or a —CR01R02-group, where R01 and R02 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted phenyl group, or represent a substituted or unsubstituted cycloalkylidene group having 3 to 6 carbon atoms which is formed by combination of R01 with R02, provided that a case in which both the R01 and R02 are substituted or unsubstituted phenyl groups is excluded;
• and R21 to R24 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or a substituted or unsubstituted alkoxyl group having 1 to 4 carbon atoms.