Electrophotographic member and electrophotographic apparatus

摘要

Provided is an electrophotographic member, which hardly changes in performance even when being left to stand for a long time period. The electrophotographic member comprises a support, an elastic layer formed on the support, and a surface layer covering a surface of the elastic layer and containing a urethane resin, and in which the urethane resin comprises a reaction product of: a hydroxyl group-terminated prepolymer obtained by reacting a polyester polyol with a polyisocyanate; and an isocyanate-terminated prepolymer obtained by reacting a polyester polyol with a polyisocyanate.

主权项

1. An electrophotographic member, comprising:
a support; an elastic layer formed on the support; and a surface layer covering a surface of the elastic layer and containing a urethane resin, and, wherein the urethane resin comprises a reaction product of
a hydroxyl group-terminated prepolymer obtained by reacting the following polyester polyol (1) or the following polyester polyol (2) with a polyisocyanate, andan isocyanate-terminated prepolymer obtained by reacting the following polyester polyol (3) or the following polyester polyol (4) with a polyisocyanate; whereinpolyester polyol (1) is:
a reaction product of
at least one carboxylic acid selected from the group consisting of adipic acid and suberic acid,an aliphatic triol having 3 or more and 6 or less carbon atoms, andan aliphatic diol having 4 or more and 6 or less carbon atoms;polyester polyol (2) is:
a reaction product of
ε-caprolactone andan aliphatic triol having 3 or more and 6 or less carbon atoms;polyester polyol (3) is:
a reaction product of
at least one carboxylic acid selected from the group consisting of adipic acid and suberic acid,an aliphatic triol having 3 or more and 6 or less carbon atoms, andan aliphatic diol having 4 or more and 6 or less carbon atoms;polyester polyol (4) is:
a reaction product of
ε-caprolactone andan aliphatic triol having 3 or more and 6 or less carbon atoms.