Composition for forming charge transporting film, electrophotographic photoreceptor, process cartridge, and image forming apparatus
View Patent ↗Provided is a composition for forming a charge transporting film, including a solvent having a dielectric constant of 5.0 or more, at least one kind of compound selected from a group consisting of the following compounds (I-a), (I-b), (I-c), and (I-d) and a compound represented by the following Formula (II), fluorine-containing resin particles, and a fluorine-containing dispersant, (I-a): a compound represented by the following Formula (III) (I-b): a compound represented by the following Formula (V) (I-c): a compound represented by the following Formula (V) (I-d): a compound represented by the following Formula (V)
1. A composition for forming a charge transporting film, comprising:
a solvent having a dielectric constant of 5.0 or more;
a compound represented by the following Formula (II);
fluorine-containing resin particles; and
a fluorine-containing dispersant,
wherein F represents a charge transporting skeleton, L′ represents a linking group with a valency of (n+1) having one or more kinds selected from a group consisting of tri- or tetravalent groups derived from alkane, an alkylene group, an alkenylene group, —C(═O)—, —N(R)—, —S—, and —O—, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, m′ represents an integer of 1 to 6, and n represents an integer of 2 to 3.
2. The composition for forming a charge transporting film according to claim 1 ,
wherein the compound represented by Formula (II) is represented by the following Formula (V),
wherein each of Ar 1 to Ar 4 independently represents a substituted or unsubstituted aryl group, Ar 5 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted arylene group, D represents a group represented by the following Formula (VIII), each of c5 to c9 represents an integer of 0 to 2, k represents 0 or 1, and the total number of D is an integer of 1 to 8,
wherein L represents a linking group having a valency of (n+1) that is a combination of tri- or tetravalent groups derived from alkane and one or more kinds selected from a group consisting of, an alkylene group, an alkenylene group, —C(═O)—, —N(R)—, —O—, and —S—, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and n represents an integer of 2 to 3.
3. The composition for forming a charge transporting film according to claim 1 ,
wherein a group linked to the charge transporting skeleton represented by F of the compound represented by Formula (II) is a group represented by the following Formula (VIII-1) or (VIII-2),
wherein X represents a divalent group, and p2 represents an integer 0 or 1.
4. The composition for forming a charge transporting film according to claim 1 ,
wherein a group linked to the charge transporting skeleton represented by F of the compound represented by Formula (II) is a group represented by the following Formula (VIII-3) or (VIII-4),
wherein X′ represents a divalent group, and p′ represents an integer 0 or 1.
5. The composition for forming a charge transporting film according to claim 1 , further comprising a thermal radical generator or a derivative thereof.
6. An electrophotographic photoreceptor comprising:
a conductive supporter; and
a photosensitive layer,
wherein a surface layer of the electrophotographic photoreceptor is a cured film formed of the composition for forming a charge transporting film according to claim 1 .
7. The electrophotographic photoreceptor according to claim 6 ,
wherein the compound represented by Formula (II) of the composition for forming a charge transporting film is represented by the following Formula (V),
wherein each of Ar 1 to Ar 4 independently represents a substituted or unsubstituted aryl group, Ar 5 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted arylene group, D represents a group represented by the following Formula (VIII), each of c5 to c9 represents an integer of 0 to 2, k represents 0 or 1, and the total number of D is an integer of 1 to 8,
wherein L represents a linking group having a valency of (n+1) that is a combination of tri- or tetravalent groups derived from alkane and one or more kinds selected from a group consisting of, an alkylene group, an alkenylene group, —C(═O)—, —N(R)—, —O—, and —S—, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and n represents an integer of 2 to 3.
8. The electrophotographic photoreceptor according to claim 6 ,
wherein a group linked to the charge transporting skeleton of the composition for forming a charge transporting film that is represented by F of the compound represented by Formula (II) is a group represented by the following Formula (VIII-1) or (VIII-2),
wherein X represents a divalent group, and p2 represents an integer 0 or 1.
9. The electrophotographic photoreceptor according to claim 6 ,
wherein a group linked to the charge transporting skeleton of the composition for forming a charge transporting film that is represented by F of the compound represented by Formula (II) is a group represented by the following Formula (VIII-3) or (VIII-4),
wherein X′ represents a divalent group, and p′ represents an integer 0 or 1.
10. The electrophotographic photoreceptor according to claim 6 ,
wherein the composition for forming a charge transporting film contains a thermal radical generator or a derivative thereof.
11. A process cartridge comprising:
an electrophotographic photoreceptor; and
at least one unit selected from a group consisting of A) a charging unit that charges a surface of the electrophotographic photoreceptor, B) a latent image forming unit that forms an electrostatic latent image on a charged surface of the electrophotographic photoreceptor, C) a developing unit that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by using a toner to form a toner image, D) a transfer unit that transfers the toner image formed on the surface of the electrophotographic photoreceptor to a recording medium, and E) a cleaning unit that cleans the electrophotographic photoreceptor,
wherein the electrophotographic photoreceptor is the electrophotographic photoreceptor according to claim 6 .
12. An image forming apparatus comprising:
an electrophotographic photoreceptor;
a charging unit that charges a surface of the electrophotographic photoreceptor;
a latent image forming unit that forms an electrostatic latent image on a charged surface of the electrophotographic photoreceptor;
a developing unit that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by using a toner to form a toner image; and
a transfer unit that transfers the toner image formed on the surface of the electrophotographic photoreceptor to a recording medium,
wherein the electrophotographic photoreceptor is the electrophotographic photoreceptor according to claim 6 .
13. A composition for forming a charge transporting film, comprising:
a solvent having a dielectric constant of 5.0 or more;
a compound represented by the following Formula (V):
wherein each of Ar 1 to Ar 4 independently represents a substituted or unsubstituted aryl group, Ar 5 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted arylene group, D represents a group represented by the following Formula (VII), each of c 5 to c 9 represents an integer of 0 to 2, k represents 0 or 1, and the total number of D is from 1 to 8,
wherein L 3 represents a divalent linking group having one or more groups selected from a group consisting of —C(═O)—, —N(R)—, —S—, and a group that is a combination of —C(═O)— with —O—, —N(R)—, or —S—, and R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and
wherein the group represented by Formula (VII) is a group represented by the following Formula (VII-1),
wherein p1 represents an integer of 0 to 4.
14. An electrophotographic photoreceptor comprising:
a conductive supporter; and
a photosensitive layer,
wherein a surface layer of the electrophotographic photoreceptor is a cured film formed of the composition for forming a charge transporting film according to claim 13 .
15. A process cartridge comprising:
an electrophotographic photoreceptor; and
at least one unit selected from a group consisting of A) a charging unit that charges a surface of the electrophotographic photoreceptor, B) a latent image forming unit that forms an electrostatic latent image on a charged surface of the electrophotographic photoreceptor, C) a developing unit that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by using a toner to form a toner image, D) a transfer unit that transfers the toner image formed on the surface of the electrophotographic photoreceptor to a recording medium, and E) a cleaning unit that cleans the electrophotographic photoreceptor,
wherein the electrophotographic photoreceptor is the electrophotographic photoreceptor according to claim 14 .
16. An image forming apparatus comprising:
an electrophotographic photoreceptor;
a charging unit that charges a surface of the electrophotographic photoreceptor;
a latent image forming unit that forms an electrostatic latent image on a charged surface of the electrophotographic photoreceptor;
a developing unit that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by using a toner to form a toner image; and
a transfer unit that transfers the toner image formed on the surface of the electrophotographic photoreceptor to a recording medium,
wherein the electrophotographic photoreceptor is the electrophotographic photoreceptor according to claim 14 .