Toner compositions

Details Toner compositions Toner compositions

G - Physics

03

G

G03G 9/097 (2006.01) G03G 13/08 (2006.01) G03G 15/08 (2006.01)

Patent

CA 2353038

A toner composition including a binder, colorant, and a toner particle surface additive component comprised of a fumed silica coated with a first major amount of an alkylsilane compound and a second minor amount of an aminoalkylsilane compound, wherein the fumed silica has a relatively large particle size of, for example, a primary particle size diameter determined by BET measurement of from about 25 to about 75 nanometers an aggregate particle size of from about 225 nanometers to about 400 nanometers. A toner composition including a binder, colorant, and a toner particle surface additive component comprised of a mixture of first coated fumed silica coated with an alkylsilane compound and a second coated fumed silica coated with an aminoalkylsilane compound wherein the first and second fumed silicas each has the same relatively large particle size. A toner composition including a binder, colorant, and a mixture of two distinct coated fumed silicas as surface additives wherein one silica is surface coated with an alkylsilane compound and the other silica is surface coated with an aminoalkylsilane compound and where the silica used for the alkylsilane coating is larger in size diameter than the silica used for the aminoalkylsilane coating.

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