Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
AssigneesRicoh Company, Ltd., Hodogaya Chemical Co., Ltd.
InventorsChihaya Adachi, Masaomi Sasaki, Kazukiyo Nagai, Tomoyuki Shimada, Chiaki Tanaka, Nozomu Tamoto, Akira Katayama, Mitsutoshi Anzai, Akihiro Imai, Katsuhiro Morooka
Life of this patent
Estimating the term…
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): ##STR1## wherein Ar.sup.1 to Ar.sup.6, X, n, k and j are as specified in the specification.
Claims28
An electrophotographic photoconductor comprising an electroconductive support, and a photoconductive layer formed thereon comprising as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I):
- ##STR112## wherein n is an integer of 5 to 5000;
- Ar.sup.1 and Ar.sup.5 may be the same or different, and are each independently a bivalent aromatic hydrocarbon group which may have a substituent or a bivalent heterocyclic group which may have a substituent;
- Ar.sup.2, Ar.sup.3, Ar.sup.4 and Ar.sup.6 each may be the same or different, and are each independently 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 ##STR113## in which R.sup.1 and R.sup.2 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--, --SO.sub.2 --, ##STR114## 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 R.sup.3 and R.sup.4 are each independently an alkyl group which may have a substituent or an aromatic hydrocarbon group which may have a substituent and wherein said photoconductive layer further comprises a sensitizing dye or a charge generation material.
An electrophotographic photoconductor comprising an electroconductive support, and a photoconductive layer formed thereon comprising as an effective component an aromatic polycarbonate resin having a repeat unit of formula (II) and a great 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).ltoreq.1:
- ##STR117## wherein k is an integer of 5 to 5000;
- j is an integer of 0 to 5000;
- Ar.sup.1 and Ar.sup.5 may be the same or different, and are each independently a bivalent aromatic hydrocarbon group which may have a substituent or a bivalent heterocyclic group which may have a substituent;
- Ar.sup.2, Ar.sup.3, Ar.sup.4 and Ar.sup.6 each may be the same or different, and are each independently 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 ##STR118## in which R.sup.1 and R.sup.2 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 to 1, and when p=1, Y is a straight-chain, branched or cyclic alkylene group having 1 to 12 carbon atoms, --O--, --S--, --SO--, --SO.sub.2 -- ##STR119## 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 R.sup.3 and R.sup.4 are each independently an alkyl group which may have a substituent or an aromatic hydrocarbon group which may have a substituent and wherein said photoconductive layer further comprises a sensitizing dye or a charge generation material.
Dependencies are inferred from the claim text.