Patent ID: 7638194

Claim:
A developer carrying member used in a developing assembly by means of which a latent image formed on an electrostatic latent image bearing member is developed and rendered visible by using a developer having been transported by a developer carrying member; the developer carrying member having at least a substrate and a resin layer formed on the substrate; said resin layer comprising a binder resin which contains at least a polymer having a unit represented by the following chemical formula (1): wherein R represents -A 25 -SO 2 R 25 , and R 25w , R 25x and R 25y are each selected from combination recited in the following (i) or (ii), where, in the case of (i), A 25 and R 25 are each selected from combination recited in the following (i-A) or (i-B), and, in the case of (ii), A 25 and R 25 are each selected from combination recited in the following (ii-A): (i) R 25w and R 25x are each independently a hydrogen atom, and R 25y is a CH 3 group or a hydrogen atom; (i-A) A 25 is a substituted or unsubstituted aliphatic hydrocarbon structure; and R 25 is a halogen atom or OR 25a , where R 25a is a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic ring structure; (i-B) A 25 is a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic ring structure; and R 25 is OH, a halogen atom, ONa, OK or OR 25a , where R 25a is a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic ring structure; (ii) R 25w and R 25x are each independently a halogen atom or a hydrogen atom, and R 25y is a CH 3 group, a halogen atom or a hydrogen atom, provided that at least one of R 25w , R 25x and R 25y is a halogen atom; and (ii-A) A 25 is a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic ring structure; and R 25 is OH, a halogen atom, ONa, OK or OR 25a , where R 25a is a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic ring structure.