Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

A process cartridge attachable to and detachable from a main body of an electrophotographic apparatus, the process cartridge comprising and integrally supporting:

• an electrophotographic photosensitive member comprising a support, a photosensitive layer and a protective layer in this order;
• and
• at least one unit selected from the group consisting of a charging unit, a developing unit and a cleaning unit, wherein
• the protective layer comprises:
• a resin comprising a structure represented by a general formula (1) and a structure represented by a general formula (2);
• and
• a compound represented by a general formula (3),
• the molar ratio of the proportion of the structure represented by the general formula (2) to the proportion of the structure represented by the general formula (1) in the resin is 0.0002 or more and 0.1000 or less, and
• the molar ratio of the content of the compound represented by the general formula (3) to the content of the structure represented by the general formula (1) in the resin in the protective layer is 0.0002 or more and 0.1000 or less in a molar ratio:
• wherein R1 is a substituted or unsubstituted alkylene group or a substituted or unsubstituted phenylene group;
• and R2 to R7 are each independently a hydrogen atom, a methyl group or an ethyl group,
• wherein R8 is a hydrogen atom or a substituted or unsubstituted alkyl group having one to three carbon atoms;
• and R9 is a hydrogen atom, a methyl group or an ethyl group,
• wherein R10 is a substituted or unsubstituted alkylene group or a substituted or unsubstituted phenylene group;
• and R11 to R15 are each independently a hydrogen atom, a methyl group or an ethyl group.

An electrophotographic apparatus comprising:

• an electrophotographic photosensitive member comprising a support, a photosensitive layer and a protective layer in this order;
• a charging unit;
• an exposure unit;
• a developing unit;
• and a transferring unit, wherein
• the protective layer comprises:
• a resin comprising a structure represented by a general formula (1) and a structure represented by a general formula (2);
• and
• a compound represented by a general formula (3),
• the molar ratio of the proportion of the structure represented by the general formula (2) to the proportion of the structure represented by the general formula (1) in the resin is 0.0002 or more and 0.1000 or less, and
• the molar ratio of the content of the compound represented by the general formula (3) to the content of the structure represented by the general formula (1) in the resin in the protective layer is 0.0002 or more and 0.1000 or less:
• wherein R1 is a substituted or unsubstituted alkylene group or a substituted or unsubstituted phenylene group;
• and R2 to R7 are each independently a hydrogen atom, a methyl group or an ethyl group,
• wherein R8 is a hydrogen atom or a substituted or unsubstituted alkyl group having one to three carbon atoms;
• and R9 is a hydrogen atom, a methyl group or an ethyl group,
• wherein R10 is a substituted or unsubstituted alkylene group or a substituted or unsubstituted phenylene group;
• and R11 to R15 are each independently a hydrogen atom, a methyl group or an ethyl group.

An electrophotographic photosensitive member comprising:

• a photosensitive layer and a protective layer in this order above a support, wherein
• the protective layer is a film obtained by curing a coating solution for protective layers,
• the coating solution for protective layers comprises:
• a solvent;
• a resin comprising a structure represented by a general formula (1-A) below and a structure represented by a general formula (2-A) below;
• and a compound represented by a general formula (3) below,
• the molar ratio of the proportion of the structure represented by the general formula (2-A) to the proportion of the structure represented by the general formula (1-A) in the resin is 0.0002 or more and 0.1000 or less, and
• the molar ratio of the content of the compound represented by the general formula (3) to the content of the structure represented by the general formula (1-A) in the resin in the protective layer is 0.0002 or more and 0.1000 or less:
• wherein R25 is a substituted or unsubstituted alkylene group or a substituted or unsubstituted phenylene group;
• and R26 to R31 are each independently a hydrogen atom, a methyl group or an ethyl group,
• wherein R32 is a hydrogen atom or a substituted or unsubstituted alkyl group having one to three carbon atoms;
• and R33 is a hydrogen atom, a methyl group or an ethyl group,
• wherein R10 is a substituted or unsubstituted alkylene group or a substituted or unsubstituted phenylene group;
• and R11 to R15 are each independently a hydrogen atom, a methyl group or an ethyl group.