Patent ID: 6818674
Filing Date: 2004-11-16
Classification: C08J,G03G

Abstract:
A toner supply roller which comprises (A) polyurethane foam obtained by agitationally mixing a urethane prepolymer, a foaming agent and a foam stabilizer, wherein said urethane prepolymer is synthesized from a polyol and a polyisocyanate in the presence of a modified silicone oil added thereto, or (B) polyurethane foam obtained by agitationally mixing a polyol, a polyisocyanate, a modified silicone oil, a foaming agent and a foam stabilizer, wherein said modified silicone oil is a modified silicone oil bearing a functional group reactive with a poly-isocyanate and said foam stabilizer is a foam stabilizer which comprises a polyether-modified silicone containing 50 to 100% by weight of a polyoxyethylene unit in the polyether moiety and said roller having the number of cells in the range of 50 to 200 per 25 mm length of the polyurethane foam and having a friction resistance of at most 1.0 N.