Patent ID: 7378206

Claim:
A non-magnetic mono-component toner composition which comprises: a) 100 parts by weight of a non-magnetic toner particle comprising i) 100 parts by weight of a binding resin comprising 10 to 90 parts by weight of a copolymer of a cyclic olefin and an acyclic olefin polymerized in the presence of a metallocene catalyst and a cocatalyst, and 100 parts by weight of a binder resin, wherein the copolymer of a cyclic olefin and an acyclic olefin comprises at least 14 mol % of norbornene-type monomers, ii) 1 to 20 parts by weight of a colorant, and iii) 0.2 to 6 parts by weight of a charge-control agent; b) 0.05 to 2.0 parts by weight of fine powder of an organic compound containing fluorine which is added to the surface of the non-magnetic toner particle, wherein the organic compound containing fluorine is polyfluorovinylidene or polytetrafluoroethylene and the fine powder of an organic compound containing fluorine has an average particle diameter of 0.1 to 4.0 μm; and c) 0.5 to 2.0 parts by weight of hydrophobic silica having a specific surface area of 100 to 240 m 2 /g, wherein the hydrophobic silica is prepared by making silica particles hydrophobic with an aminosilane-type coupling agent that contains a positively charged group selected from the group consisting of H 2 N(CH 2 ) 2 NH(CH 2 ) 3 Si(OCH 3 ) 3 , H 2 N(CH 2 ) 2 NH(CH 2 ) 3 Si(CH 3 )(OCH 3 ) 2 , H 2 N(CH 2 ) 2 NH(CH 2 ) 2 Si(OCH 3 ) 3 , H 2 N(CH 2 ) 2 NH(CH 2 ) 2 NH(CH 2 ) 2 Si(OCH 3 ) 3 , H 2 N(CH 2 ) 3 Si (OCH 3) 3 , C 6 H 5 NH(CH 2 ) 3 Si(OCH 3 ) 3 , and a mixture thereof.