US 8,012,658 B2 · Toner for developing electrostatic image, and image forming apparatus and process cartridge using the toner

Abstract

A toner including a binder resin including a polyester resin and a vinyl resin; a wax; and a colorant, wherein the vinyl resin includes a unit obtained from a radically polymerizable monomer having an alkyloxysilyl group. An image forming apparatus including an image bearing member configured to bear an electrostatic image thereon; a developing device configured to develop the electrostatic image with a developer including the toner to form a toner image on the image bearing member; and a transfer device configured to transfer the toner image onto a receiving material. A process cartridge including an image bearing member; and a developing device configured to develop an electrostatic image on the image bearing member with a developer including the toner, wherein the process cartridge is detachably attached to an image forming apparatus as a unit.

Claims14

Dependent claims

A toner comprising

a binder resin including a polyester resin and a vinyl resin;
a wax;
and
a colorant,
wherein the toner is prepared by an emulsion aggregation method, and wherein the vinyl resin is prepared by polymerizing at least one radically polymerizable monomer including a monomer having an alkyloxysilyl group and having the following formula (I):
wherein R represents a linear or branched alkyl group having 1 to 6 carbon atoms;
R1 represents a hydrogen atom or a methyl group;
R2 represents an alkyl group having 1 to 3 carbon atoms;
X represents a phenylene group, —COO—, or —CONH—;
Y represents a linear or branched alkylene group having 1 to 6 carbon atoms;
each of k and m is 0 or 1, wherein a case where both k and m are 0 is excluded;
and n is 0, 1 or 2, such that the toner contains the monomer having an alkyloxysilyl group in an amount of from 3% by weight to 30% by weight.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/026,057Filed 5 Feb 2008

Priority

JP 2007-0586428 Mar 2007

Published

US 2008/0220357 A111 Sep 2008

Granted

6 Sep 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G03G 9/08755
Comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: polyesters
G03G 9/0804
Preparation methods: whereby the components are brought together in a liquid dispersing medium
G03G 9/08704
Comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds: polyalkenes
G03G 9/08722
Comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds: polyvinylalcohols; Polyallylalcohols;…

Toner for developing electrostatic image, and image forming apparatus and process cartridge using the toner

Life of this patent

Toner for developing electrostatic image, and image forming apparatus and process cartridge using the toner

Life of this patent

Abstract

Claims14