Patent ID: 8546051

Claim:
A developer bearing member comprising a substrate and an electrically conductive resin coating layer formed on the surface thereof, wherein the electrically conductive resin coating layer is formed from a resin composition containing a phenolic resin having in its structure at least one selected from the group consisting of an —NH 2 group, an ═NH group and an —NH— linkage, a quaternary phosphonium salt and electrically conductive fine particles; the resin composition contains 1 part by mass or more and 60 parts by mass or less of the quaternary phosphonium salt with respect to 100 parts by mass of the phenolic resin; and the quaternary phosphonium salt is represented by the following Formula (1) wherein R 1 to R 3 each independently represent an alkyl group having 1 to 4 carbon atoms that may have a substituent, a phenyl group that may have a substituent or a benzyl group that may have a substituent; R 4 represents an alkyl group having 1 to 16 carbon atoms that may have a substituent, an alkenyl group that may have a substituent, an alkynyl group that may have a substituent, a phenyl group that may have a substituent or a benzyl group that may have a substituent; and X − represents a halogen ion or OH − .