Toner and image forming method
AssigneeRicoh Company, Ltd.
InventorsNamie Suzuki, Hisashi Nakajima, Kazumi Suzuki, Yoshitaka Yamauchi
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Abstract
A toner is provided. The toner comprises a binder resin comprising a polyester resin, a release agent comprising an ester wax, and a wax dispersing agent comprising a hybrid resin. The hybrid resin comprises a condensation polymerization resin unit and an addition polymerization resin unit. The condensation polymerization resin unit comprises a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, and the carboxylic acid component comprises an aliphatic dicarboxylic acid having 9 to 14 carbon atoms. The addition polymerization resin unit comprises an addition polymerization product of a styrene monomer.
Claims11
A toner comprising:
- a binder resin comprising a polyester resin;
- a release agent comprising an ester wax which comprises a monoester wax comprising a straight-chain saturated monocarboxylic acid having 14 to 30 carbon atoms and a straight-chain saturated monovalent alcohol having 14 to 30 carbon atoms, wherein the ester wax has a dispersion diameter of from 0.1 to 0.5 μm in a cross-section of the toner dyed with ruthenium;
- and
- a wax dispersing agent comprising a hybrid resin, the hybrid resin comprising:
- a condensation polymerization resin unit comprising a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, the carboxylic acid component comprising an aliphatic dicarboxylic acid having 9 to 14 carbon atoms;
- and
- an addition polymerization resin unit comprising an addition polymerization product of a styrene monomer,
- wherein the toner has an endothermic peak having an endothermic quantity of from 3 to 10 J/g and said endothermic peak arises from the ester wax.
A toner comprising:
- a binder resin comprising a polyester resin;
- a release agent comprising an ester wax, wherein the ester wax has a dispersion diameter of from 0.1 to 0.5 μm in a cross-section of the toner dyed with ruthenium;
- and
- a wax dispersing agent comprising a hybrid resin, the hybrid resin comprising:
- a condensation polymerization resin unit comprising a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, the carboxylic acid component comprising an aliphatic dicarboxylic acid having 9 to 14 carbon atoms;
- and
- an addition polymerization resin unit comprising an addition polymerization product of a styrene monomer;
- wherein the toner has an average circularity of 0.95 or less, and
- wherein the toner has an endothermic peak having an endothermic quantity of from 3 to 10 J/g and said endothermic peak arises from the ester wax.
Dependencies are inferred from the claim text.