Electrophotographic light-sensitive material

An electrophotographic light-sensitive material comprising a support having provided thereon at least one photoconductive layer containing an inorganic photoconductive substance and a binder resin, wherein the binder resin comprises at least one resin (A) or (A') and at least one resin (B):

• Binder Resin (A):
• a graft copolymer having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 formed from at least a monofunctional macromonomer (MA) and a monomer represented by formula (III), wherein the macrofunctional macromonomer (MA) has a weight average molecular weight of not more than 2.times.10.sup.4 and has a polymerizable double bond group represented by the following formula (I) at only one terminal of the main chain of a polymer containing at least one kind of the polymer components represented by the following formula (IIa) and (IIb), wherein the copolymer has at least one acidic group
• selected from --PO.sub.3 H.sub.2, --SO.sub.3 H, --COOH, ##STR234## (wherein R represents a hydrocarbon group or --OR' (wherein R' represents a hydrocarbon group)), and a cyclic acid anhydride-containing group bonded to only one terminal of the main chain of the copolymer;
• ##STR235## wherein A.sub.o represents --COO--, --OCO--, --CH.sub.2).sub.l.sbsb.1 OCO--, --CH.sub.2).sub.l.sbsb.2 OCO-- (wherein l.sub.1 and l.sub.2 each represents an
• integer of from 1 to 3), ##STR236## (wherein R.sub.1 represents a hydrogen atom or a hydrocarbon group), --CONHCOO--, --CONHCONH--, --CONHSO.sub.2 --, or ##STR237## and a.sub.1 and a.sub.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group, --COO--D.sub.1 or --COO--D.sub.1 via a hydrocarbon group (wherein D.sub.1 represents a hydrocarbon group which may be substituted);
• ##STR238## wherein A.sub.1 has the same meaning as A.sub.o in formula (I) described above;
• B.sub.1 represents an aliphatic group having from 1 to 18 carbon atoms or an aromatic group having from 6 to 12 carbon atoms;
• b.sub.1 and b.sub.2, which may be the same or different, have the same meaning as a.sub.1 and a.sub.2 in formula (I);
• and B.sub.o represents --CN, --CONH.sub.2, or ##STR239## (wherein J represents a hydrogen atom, a halogen atom, an alkoxy group or --COOD.sub.4 (wherein D.sub.4 represents an alkyl group, an aralkyl group, or an aryl group));
• ##STR240## wherein A.sub.2 has the same meaning as A.sub.1 in formula (IIa);
• B.sub.2 has the same meaning as B.sub.1 in formula (IIa);
• and c.sub.1 and c.sub.2, which may be the same or different, have the same meaning as a.sub.1 and a.sub.2 in formula (I);
• Binder Resin (A'):
• a copolymer having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 and formed from at least a monofunctional macromonomer (MA') and a monomer represented by the above formula (III), wherein said macromonomer (MA') has a weight average molecular weight of not more than 2.times.10.sup.4 and has a polymerizable double bond group represented by the above formula (I) at only one terminal of the main chain of a polymer containing at least one of the polymer components represented by the above formulae (IIa) and (IIb) and a polymer component containing at least one acidic group selected from --COOH, --PO.sub.3 H.sub.2, ##STR241## (wherein R represents a hydrocarbon
• group or --OR' (wherein R' represents a hydrocarbon group));
• Binder Resin (B):
• a graft type copolymer having a weight average molecular weight of from 3.times.10.sup.4 to 1.times.10.sup.6 formed from a monomer and as a copolymer component at least one of a monofunctional macromonomer (M) having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 having a polymerizable double bond group at the terminal of the polymer main chain of a B block of an AB block copolymer composed of an A block containing at least one of a polymer component containing at least one acidic group selected from --PO.sub.3 H.sub.2,
• --COOH, --SO.sub.3 H, phenolic OH, ##STR242## (wherein R.sub.o has the
• same meaning as R as described above), and a cyclic acid anhydride-containing group and a B block containing at least a polymer component represented by the following formula (IV);
• ##STR243## wherein d.sub.1 and d.sub.2 each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group, --COO--R.sub.24 or --COO--R.sub.24 via a hydrocarbon group (wherein R.sub.24 represents a hydrocarbon group which may be substituted), and X.sub.3 represents --COO--, --OCO--, --CH.sub.2).sub.l.sbsb.3 OCO--, --CH.sub.2).sub.l.sbsb.4 COO--, (wherein l.sub.3 and l.sub.4 each represents an
• integer of from 1 to 3), ##STR244## (wherein R.sub.23 represents a hydrogen atom or a hydrocarbon group), --CONHCOO--, --CONHCONH--, or ##STR245## and R.sub.21 represents a hydrocarbon group, provided that, when X.sub.3 is ##STR246## R.sub.21 represents a hydrogen atom or a hydrocarbon group.