Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
AssigneeRicoh Company, Ltd.
InventorsChiaki Tanaka, Nozomu Tamoto, Masaomi Sasaki, Kazukiyo Nagai, Tomoyuki Shimada, Chihaya Adachi, Akira Katayama, Mitsutoshi Anzai, Katsuhiro Morooka
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Abstract
An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): wherein Ar1 to Ar3, X, n, k and j are as specified in the specification.
Claims22
An aromatic polycarbonate resin having a repeat unit of formula (I):
- wherein n is an integer of 5 to 5000;
- Ar1, Ar2, Ar3 and Ar4, which may be the same or different, represent a bivalent aromatic hydrocarbon group which may have a substituent, or a bivalent heterocyclic group which may have a substituent;
- Ar5 is an aromatic hydrocarbon group which may have a substituent, or a heterocyclic group which may have a substituent;
- and X is a bivalent aliphatic group, a bivalent cyclic aliphatic group, or
- in which R1 and R2 are each independently an alkyl group which may have a substituent, an aromatic hydrocarbon group which may have a substituent, or a halogen atom;
- l and m are each independently an integer of 0 to 4;
- and p is an integer of 0 or 1, and when p=1, Y is a straight-chain, branched or cyclic alkylene group having 1 to 12 carbon atoms, —O—, —S—, —SO—, —SO2—,
- in which z is a bivalent aliphatic hydrocarbon group;
- a is an integer of 0 to 20;
- b is an integer of 1 to 2000;
- and R3 and R4 are each independently an alkyl group which may have a substituent or an aromatic hydrocarbon group which may have a substituent.
An aromatic polycarbonate resin having a repeat unit of formula (II) and a repeat unit of formula (III), with the composition ratio of the repeat unit of formula (II) to the repeat unit of formula (III) being in the relationship of 0<k/(k+j)≦1;
- wherein k is an integer of 5 to 5000;
- j is an integer of 0 to 5000;
- Ar1, Ar2, Ar3 and Ar4, which may be the same or different, represent a bivalent aromatic hydrocarbon group which may have a substituent, or a bivalent heterocyclic group which may have a substituent;
- Ar5 is an aromatic hydrocarbon group which may have a substituent, or a heterocyclic group which may have a substituent;
- and X is a bivalent aliphatic group, a bivalent cyclic aliphatic group, or
- in which R1 and R2 are each independently an alkyl group which may have a substituent, an aromatic hydrocarbon group which may have a substituent, or a halogen atom;
- l and m are each independently an integer of 0 to 4;
- and p is an integer of 0 or 1, and when p=1, Y is a straight-chain, branched or cyclic alkylene group having 1 to 12 carbon atoms, —O—, —S—, —SO—, —SO2—,
- in which Z is a bivalent aliphatic hydrocarbon group;
- a is an integer of 0 to 20;
- b is an integer of 1 to 2000;
- and R3 and R4 are each independently an alkyl group which may have a substituent or an aromatic hydrocarbon group which may have a substituent.
Dependencies are inferred from the claim text.