| abstract |
The object of the present invention is to provide a rubber part for a developing roller with a coating layer and a preparation method thereof. While maintaining the flexibility of the coating layer and the convex part, without contaminating the peripheral part, it can ensure sufficient thickness to achieve non-adhesion and low friction; this method uses reactive silicone oil, isocyanate compound and a diluent solvent that can dissolve the above two Add it to a reaction container, react the reactive silicone oil and the isocyanate compound in a dilute solvent in the reaction container, and perform a prepolymerization reaction to form a polymerized state while maintaining a dissolved state in the solvent, and then, in In the reaction solution produced by this prepolymerization reaction, polyol and isocyanate compound solutions are mixed, and silicone rubber particles 101 are further prepared to prepare a coating solution for coating layer 13, and the coating solution is applied to the developing roller 1. around and allow it to solidify to form. |