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 (A) at least one graft co-polymer resin having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4, formed from a monofunctional macromonomer (MA) and a monomer represented by the general formula (III) described below, and having at least one acidic group selected from the group consisting of --PO.sub.3 H.sub.2, --SO.sub.3 H, --COOH, --OH, ##STR240## (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 of the terminals of the main chain thereof, the monofunctional macromonomer (MA) having a weight average molecular weight of not more than 2.times.10.sup.4, containing at least one polymer component corresponding to a repeating unit represented by the general formula (IIa) or (IIb) described below, and having a polymerizable double bond-containing group represented by the general formula (I) described below bonded to only one of the terminals of the main chain of the macromonomer:

• ##STR241## wherein A.sub.0 represents --COO--, --OCO--, --(CH.sub.2)l.sub.1 --OCO--, --(CH.sub.2)l.sub.2 --COO-- (wherein l.sub.1 and l.sub.2 each represents an integer of from 1 to 3), --O--, --SO.sub.2 --, --CO--, ##STR242## (wherein R.sub.1 represents a hydrogen atom or a hydrocarbon group), --CONHCOO--, --CONHCONH-- or ##STR243## 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 bonded through a hydrocarbon group (wherein D.sub.1 represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group;
• ##STR244## wherein A.sub.1 has the same meaning as A.sub.0 defined in the general formula (I);
• 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, each has the same meaning as a.sub.1 and a.sub.2 defined in the general formula (I);
• and B.sub.0 represents --CN, --CONH.sub.2 or ##STR245## (wherein J represents a hydrogen atom, a halogen atom, an alkoxyl group or --COOD.sub.4 (wherein D.sub.4 represents an alkyl group, an aralkyl group or an aryl group));
• ##STR246## wherein A.sub.2 has the same meaning as A.sub.1 defined in the general formula (IIa);
• B.sub.2 has the same meaning as B.sub.1 defined in the general formula (IIa);
• and c.sub.1 and c.sub.2, which may be the same or different, each has the same meaning as a.sub.1 and a.sub.2 defined in the general formula (I);
• and (B) at least one copolymer resin having a weight average molecular weight of from 3.times.10.sup.4 to 1.times.10.sup.6 and formed from at least one polyester type macromonomer (MB) having a weight average molecular weight of from 1.times.10.sup.3 to 1.5.times.10.sup.4 as a polymer component and represented by the following general formula (VIa), (VIb), (VIc), or (VId):
• ##STR247## wherein the group in the brackets represents a recurring unit;
• f.sub.1 and f.sub.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group having from 1 to 8 carbon atoms, --COO--T.sub.1, or --COO--T.sub.2 bonded through a hydrocarbon group having from 1 to 8 carbon atoms (wherein T.sub.1 and T.sub.2 each represents a hydrocarbon group having from 1 to 18 carbon atoms);
• X.sub.1 represents a direct bond, --COO--, --OCO--, --CH.sub.2)u.sub.1 COO--, --CH.sub.2)u.sub.2 OCO-- (wherein u.sub.1 and u.sub.2 each represents an integer of from 1 to 3), ##STR248## (wherein d.sub.1 represents a hydrogen atom or a hydrocarbon group having from 1 to 12 carbon atoms), --CONHCONH--, --CONHCOO--, --O--, ##STR249## or --SO.sub.2 --;
• Y.sub.1 represents a group bonding X.sub.1 to --COO--;
• W.sub.1 and W.sub.2, which may be the same or different, each represents a divalent aliphatic group, a divalent aromatic group (each of the aforesaid groups may have, in the bond of each divalent organic moiety, at least one bonding group selected from --O--, --S--, ##STR250## (wherein d.sub.2 represents a hydrogen atom or a hydrocarbon group having from 1 to 12 carbon atoms), --SO.sub.2 --, --COO--, --OCO--, --CONHCO--, --NHCONH--, ##STR251## (wherein d.sub.3 has the same meaning as d.sub.2), ##STR252## (wherein d.sub.4 has the same meaning as d.sub.2), and ##STR253## or an organic moiety composed of a combination of these moieties;
• R.sub.61 represents a hydrogen atom or a hydrocarbon group;
• f.sub.3 and f.sub.4 each has the same meaning as f.sub.1 and f.sub.2 ;
• X.sub.2 has the same meaning as X.sub.1 ;
• Y.sub.2 represents a group bonding X.sub.2 to --COO--;
• W.sub.3 represents a divalent aliphatic group;
• R.sub.62 has the same meaning as R.sub.61 ;
• R.sub.61 ' represents a hydrogen atom, a hydrocarbon group or --COR.sub.63 ' (wherein R.sub.63 ' represents a hydrocarbon group);
• Y.sub.1 ' represents a group bonding X.sub.1 to Z.sub.1 ;
• Z.sub.1 represents --CH.sub.2 --, --O--, or --NH--;
• Y.sub.2 ' represents a group bonding X.sub.2 to Z.sub.2 ;
• Z.sub.2 has the same meaning as Z.sub.1 ;
• and R.sub.62 ' has the same meaning as R.sub.61 '.