Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
First Claim
1. An electrophotographic photosensitive member, comprising:
- an electroconductive support and a photosensitive layer disposed on the electroconductive support;
wherein the photosensitive layer comprises a polymerizate of a hole-transporting compound having at least two chain polymerization function groups in its molecule represented by formula (1) below;
(P1)a—
A—
(Z—
(P2)d)b
(1), wherein A denotes a hole-transporting group, P1 and P2 independently denote a chain polymerization function group and Z denotes a bonding organic group;
a and b and d are independently an integer of at least 0 satisfying a+b×
d≧
2 provided that if a≧
2, plural groups P1 can be identical or different;
if b≧
2, plural groups Z can be identical or different; and
if b×
d≧
2, plural groups P2 can be identical or different; and
the hole-transporting group A is such that a combination of A with a number (a+b) of hydrogen atoms instead of (P1)a— and
—
(Z—
(P2)d)b as in the formula (1) would provide a hole-transporting compound that is a compound represented by a formula selected from formulae (2), (3), (4) and (6), or a condensed cyclic hydrocarbon compound or condensed heterocyclic compound having a group represented by formula (5) below;
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Abstract
An electrophotographic photosensitive member is provided by forming a photosensitive layer on an electroconductive support. The photosensitive layer is provided with particularly excellent durability while retaining good electrophotographic performances when formed as a layer comprising a polymerizate of a hole-transporting compound having at least two chain polymerization function groups in its molecule represented by formula (1) below:
—(p1)a—A—(Z—(P2)d)b (1),
wherein A denotes a hole-transporting group, P1 and P2 independently denote a chain polymerization function group and Z denotes a bonding organic group; a, b and d are independently an integer of at least 0 satisfying a+b×d≧2 provided that if a≧2, plural groups P1 can be identical or different; if b≧2, plural groups Z can be identical or different; and if b×d≧2, plural groups P2 can be identical or different.
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Citations
29 Claims
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1. An electrophotographic photosensitive member, comprising:
- an electroconductive support and a photosensitive layer disposed on the electroconductive support;
wherein the photosensitive layer comprises a polymerizate of a hole-transporting compound having at least two chain polymerization function groups in its molecule represented by formula (1) below;
(P1)a—
A—
(Z—
(P2)d)b
(1),wherein A denotes a hole-transporting group, P1 and P2 independently denote a chain polymerization function group and Z denotes a bonding organic group;
a and b and d are independently an integer of at least 0 satisfying a+b×
d≧
2 provided that if a≧
2, plural groups P1 can be identical or different;
if b≧
2, plural groups Z can be identical or different; and
if b×
d≧
2, plural groups P2 can be identical or different; and
the hole-transporting group A is such that a combination of A with a number (a+b) of hydrogen atoms instead of (P1)a— and
—
(Z—
(P2)d)b as in the formula (1) would provide a hole-transporting compound that is a compound represented by a formula selected from formulae (2), (3), (4) and (6), or a condensed cyclic hydrocarbon compound or condensed heterocyclic compound having a group represented by formula (5) below;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 29)
- an electroconductive support and a photosensitive layer disposed on the electroconductive support;
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25. A process for producing an electro-photographic photosensitive member, comprising a photosensitive layer-forming step of forming a photosensitive layer on an electroconductive support;
- said photosensitive layer-forming step including a step of forming a coating layer comprising a hole-transporting compound having at least two chain-polymerization function groups on the electroconductive support, and a step of polymerizing the hole-transporting compound in the coating layer, wherein the hole-transporting compound is represented by formula (1) below;
(P1)a—
A—
(Z—
(P2)d)b
(1),wherein A denotes a hole-transporting group, P1 and P2 independently denote a chain polymerization function group and Z denotes a bonding organic group;
a, b and d are independently an integer of at least 0 satisfying a+b×
d≧
2 provided that if a≧
2, plural groups P1 can be identical or different;
if b≧
2, plural groups Z can be identical or different; and
if b×
d≧
2, plural groups P2 can be identical or different; and
the hole-transporting group A is such that a combination of A with a number (a+b) of hydrogen atoms instead of (P1)—
a and —
(Z—
(P2)d)b as in the formula (1) would provide a hole-transporting compound that is a compound represented by a formula selected from formulae (2), (3), (4) and (6), or a condensed cyclic hydrocarbon compound or condensed heterocyclic compound having a group represented by formula (5) below;
- View Dependent Claims (26, 27, 28)
- said photosensitive layer-forming step including a step of forming a coating layer comprising a hole-transporting compound having at least two chain-polymerization function groups on the electroconductive support, and a step of polymerizing the hole-transporting compound in the coating layer, wherein the hole-transporting compound is represented by formula (1) below;
Specification