Patent ID: 8913931

Claim:
A developing roll for use in an electrophotographic machine, the roll comprising: a shaft; an elastomeric layer that surrounds an outer periphery of the shaft; and a surface layer that surrounds an outer surface of the elastomeric layer, wherein the surface layer contains a composition that contains: an (A) ingredient that comprises a binder resin having a functional group that is reactive with an alkoxy silyl group contained in the following (B) ingredient; and a (B) ingredient that comprises an ion conductive agent that contains a cation having a chemical structure represented by the following general formula (1): R1-N + —R2-Si(OR3) 3 (1), where: R1 is any one of a cyclic organic group, and a linear organic group; R2 is a group containing at least (CH2)n, wherein n represents an integer number; and R3 is an alkyl group, wherein the cation in the (B) ingredient is bound with the (A) ingredient, and wherein the content of the (B) ingredient is 0.10 to 3 parts by mass with respect to 100 parts by mass of the (A) ingredient.