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US 6,203,960 B1Granted
Toner compositions
AssigneeXerox Corporation
InventorsRoger N. Ciccarelli, Denise R. Bayley, Thomas R. Pickering
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AssigneeXerox Corporation
InventorsRoger N. Ciccarelli, Denise R. Bayley, Thomas R. Pickering
Estimating the term…
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.
A toner composition comprised of binder, colorant, and a toner particle surface additive component comprised of a first coated fumed silica surface coated with a first major amount of an alkylsilane compound present in an amount of from about 3 to about 20 weight percent based on the weight of the fumed silica and a second minor amount of an aminoalkylsilane compound present in an amount of from about 3 to about 700 parts per million of basic nitrogen (N:) based on the weight of the fumed silica.
A toner composition comprised of binder, colorant, and a toner particle surface additive component comprised of a mixture of first coated fumed silica present in the toner composition in an amount of from about 1 to about 8 weight percent which first silica is coated with an alkylsilane compound in an amount of from about 3 to about 20 weight percent based on the weight of the first coated fumed silica, and a second coated fumed silica present in the toner composition in an amount of from about 0.05 to about 5 weight percent which second silica is coated with an aminoalkylsilane compound in an amount of from about 1 to about 20 weight percent based on the weight of the second coated fumed silica, wherein the first and second fumed silicas each has a primary particle size diameter determined by BET measurement of from about 25 to about 75 nanometers and an aggregate particle size of from about 225 nanometers to about 400 nanometers.
A toner composition comprised of binder, colorant, and a toner particle surface additive component comprised of a mixture of first coated fumed silica present in the toner composition in an amount of from about 1 to about 8 weight percent and which first silica is coated with an alkylsilane compound in an amount of from about 3 to about 20 weight percent based on the weight of the first coated fumed silica, and a second coated fumed silica present in the toner composition in an amount of from about 0.05 to about 5 weight percent and which second silica is coated with an aminoalkylsilane compound in an amount of from about 1 to about 10 weight percent based on the weight of the second coated fumed silica, wherein the first fumed silica has an uncoated primary particle size diameter determined by BET measurement of from about 25 to about 75 nanometers and an aggregate size diameter of about 225 to about 400 nanometers, and the second fumed silica has an uncoated primary particle size diameter determined by BET measurement of from about 8 to about 25 nanometers and an aggregate size diameter is about 200 to about 275 nanometers, and wherein the first and second coated fumed silicas are mixed together so that the total silica present in the toner composition has a surface nitrogen content in an amount of from 3 to about 700 parts per million of basic nitrogen (N:) based on the total weight of the two fumed silicas.
A toner composition comprised of binder, colorant, and a toner particle surface additive component comprised of a coated metal oxide coated with a first major amount of an alkylsilane compound and a second minor amount of an aminoalkylsilane compound wherein the coated metal oxide has a surface nitrogen content in an amount of from 3 to about 700 parts per million of basic nitrogen (N:) based on the total weight of the coated metal oxide.
Dependencies are inferred from the claim text.