Electrophotographic photoconductor and aromatic polycarbonate resin for use therein

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 repeat unit of formula (III), with the composition ratio of said repeat unit of formula (II) to said repeat unit of formula (III) being in the relationship of 0<k/(k+j).ltoreq.1:

• ##STR113## wherein k is an integer of 5 to 5000;
• j is an integer of 0 to 5000;
• Ar.sup.1, Ar.sup.2 and Ar.sup.3 each may be the same or different, and is a bivalent aromatic hydrocarbon group;
• R.sup.1 and R.sup.2 each may be the same or different, and is an acyl group, an alkyl group which may have a substituent, 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 ##STR114## in which R.sup.3 and R.sup.4 each is an alkyl group which may have a substituent, an aromatic hydrocarbon group which may have a substituent, or a halogen atom;
• l and m each is 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 --, ##STR115## 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.5 and R.sup.6 each is 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 (I):

• ##STR121## wherein n is an integer of 5 to 5000;
• Ar.sup.1, Ar.sup.2 and Ar.sup.3 each may be the same or different, and is a bivalent aromatic hydrocarbon group;
• R.sup.1 and R.sup.2 each may be the same or different, and is an acyl group, an alkyl group which may have a substituent, 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 ##STR122## in which R.sup.3 and R.sup.4 each is an alkyl group which may have a substituent, an aromatic hydrocarbon group which may have a substituent, or a halogen atom;
• l and m each is 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 --, ##STR123## 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.5 and R.sup.6 each is 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 said repeat unit of formula (II) to said repeat unit of formula (III) being in the relationship of 0<k/(k+j).ltoreq.1:

• ##STR129## ##STR130## wherein k is an integer of 5 to 5000;
• j is an integer of 0 to 5000;
• Ar.sup.1, Ar.sup.2 and Ar.sup.3 each may be the same or different, and is a bivalent aromatic hydrocarbon group;
• R.sup.1 and R.sup.2 each may be the same or different, and is an acyl group, an alkyl group which may have a substituent, 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 ##STR131## in which R.sup.3 and R.sup.4 each is an alkyl group which may have a substituent, an aromatic hydrocarbon group which may have a substituent, or a halogen atom;
• l and m each is 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 --, ##STR132## 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..ident. and R.sup.6 each is an alkyl group which may have a substituent or an aromatic hydrocarbon group which may have a substituent.