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US 2026/0244122 A1Published application
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsERI FUJISAWA, KOICHI NAKATA, IKUYO KUROIWA, NAOHIRO TAKAHASHI
Life of this patent
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Abstract
Provided is an electrophotographic photosensitive member including a surface layer having excellent abrasion resistance and suppressing image smearing. The electrophotographic photosensitive member includes a surface layer containing a polymerized product of a polymerizable charge-transporting compound. In dynamic viscoelasticity measurement, the surface layer has a storage elastic modulus G′ and a loss elastic modulus G″ satisfying a relationship of G′>G″ at normal temperature, and has a peak top of Tan δ in a temperature range of 85° C. or more and 100° C. or less.
Claims13
An electrophotographic photosensitive member comprising a surface layer containing a polymerized product of at least one kind of polymerizable charge-transporting compound selected from the group consisting of:
- a compound represented by the formula (CT-1);
- and a compound represented by the formula (CT-2),
- wherein, in dynamic viscoelasticity measurement, the surface layer has a storage elastic modulus G′ and a loss elastic modulus G″ satisfying a relationship of G′>G″ at normal temperature, and has a peak top of Tan δ in a temperature range of 85° C. or more and 100° C. or less:
- in the formula (CT-1), Ar11 to Ar13 each independently represent a substituted aryl group or an unsubstituted aryl group, and a substituent that the substituted aryl group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), provided that the compound represented by the formula (CT-1) has at least one monovalent functional group represented by the formula (P-1):
- in the formula (P-1), Z11 represents an alkylene group having 1 or more and 6 or less carbon atoms, and * represents a bonding site with a structure represented by the formula (CT-1) or (CT-2):
- in the formula (CT-2), Ar21 to Ar24 each independently represent a substituted aryl group or an unsubstituted aryl group, Ar25 represents a substituted arylene group or an unsubstituted arylene group, a substituent that the substituted aryl group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), and a substituent that the substituted arylene group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), provided that the compound represented by the formula (CT-2) has at least one monovalent functional group represented by the formula (P-1).
3 more elements
An electrophotographic photosensitive member comprising a surface layer containing a polymerized product of a composition containing a thiol compound, and at least one kind of polymerizable charge-transporting compound selected from the group consisting of:
- a compound represented by the formula (CT-1);
- and a compound represented by the formula (CT-2),
- wherein, when a content of the polymerizable charge-transporting compound represented by each of the formulae (CT-1) and (CT-2) in the composition is represented by WCT, and a content of the thiol compound therein is represented by WT, the WCT and the WT satisfy the formula (1):
- 0.01
- ≤
- WT
- /
- WCT
- ≤
- 0.07
- (
- 1
- )
- in the formula (CT-1), Ar11 to Ar13 each independently represent a substituted aryl group or an unsubstituted aryl group, and a substituent that the substituted aryl group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), provided that the compound represented by the formula (CT-1) has at least one monovalent functional group represented by the formula (P-1):
- in the formula (P-1), Z11 represents an alkylene group having 1 or more and 6 or less carbon atoms, and * represents a bonding site with a structure represented by the formula (CT-1) or (CT-2):
- in the formula (CT-2), Ar21 to Ar24 each independently represent a substituted aryl group or an unsubstituted aryl group, Ar25 represents a substituted arylene group or an unsubstituted arylene group, a substituent that the substituted aryl group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), and a substituent that the substituted arylene group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), provided that the compound represented by the formula (CT-2) has at least one monovalent functional group represented by the formula (P-1).
13 more elements
An electrophotographic apparatus comprising:
- an electrophotographic photosensitive member comprising a surface layer containing a polymerized product of at least one kind of polymerizable charge-transporting compound selected from the group consisting of:
- a compound represented by the formula (CT-1);
- and a compound represented by the formula (CT-2),
- wherein, in dynamic viscoelasticity measurement, the surface layer has a storage elastic modulus G′ and a loss elastic modulus G″ satisfying a relationship of G′>G″ at normal temperature, and has a peak top of Tan δ in a temperature range of 85° C. or more and 100° C. or less:
- in the formula (CT-1), Ar11 to Ar13 each independently represent a substituted aryl group or an unsubstituted aryl group, and a substituent that the substituted aryl group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), provided that the compound represented by the formula (CT-1) has at least one monovalent functional group represented by the formula (P-1):
- in the formula (P-1), Z11 represents an alkylene group having 1 or more and 6 or less carbon atoms, and * represents a bonding site with a structure represented by the formula (CT-1) or (CT-2):
- in the formula (CT-2), Ar21 to Ar24 each independently represent a substituted aryl group or an unsubstituted aryl group, Ar25 represents a substituted arylene group or an unsubstituted arylene group, a substituent that the substituted aryl group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), and a substituent that the substituted arylene group may have is an alkyl group having 1 or more and 4 or less carbon atoms, or a monovalent functional group represented by the formula (P-1), provided that the compound represented by the formula (CT-2) has at least one monovalent functional group represented by the formula (P-1);
- and
- at least one unit selected from the group consisting of:
- a charging unit;
- an exposing unit;
- a developing unit;
- and a transfer unit.
10 more elements
Dependencies are inferred from the claim text.