Tokai Rubber Industries, Ltd.

Sumitomo Riko Company Limited

Atsushi Ozaki

Yosuke Hayashi

Kadai Takeyama

Masanori Ishida

Kentaro Imai

Naoki Yamaguchi

Toshihiko Arata

Fumio Misumi

Masanori Satou

An electrophotographic device member R is used in an electrophotographic device. The electrophotographic device member R has a surface layer. The surface layerhas a matrix polymerforming a skeleton of the surface layerand a surface modifiercontained in the matrix polymer. The surface modifieris composed of a copolymer containing, in its molecule, a first polymerization unit derived from a (meth)acrylate having a silicone groupand a second polymerization unit derived from a (meth)acrylate having a fluorine-containing group

Electrophotographic device member

Provided is a developing roll for use in an electrophotographic machine capable of preventing an ion conductive agent from blooming and retaining long-term charge decay characteristics. The roll () includes a shaft (), an elastomeric layer () and a surface layer (), wherein the surface layer contains a composition containing an (A) ingredient defining a binder resin having a functional group reactive with an alkoxy silyl group in a (B) ingredient, and the (B) ingredient defining an ion conductive agent containing a cation having a chemical structure represented by R1-N-R2-Si(OR3), where R1: a cyclic organic group or a linear organic group, R2: a group containing at least (CH2)n, n representing an integer number, and R3: an alkyl group, wherein the cation is bound with the (A) ingredient, and wherein the (B) ingredient is 0.10 to 3 parts by mass with respect to 100 parts by mass of the (A) ingredient.

Developing roll for electrophotographic machine

Growing community of inventors

Shizuoka, Japan

Atsushi Ozaki