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AssigneeCanon Kabushiki Kaisha
InventorsTetsuya Yano, Tsuyoshi Nomoto, Shinya Kozaki, Tsutomu Honma
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Electrostatic charge image developing toner allows to design the toner characteristics such as chargeability, flowability, stability in time and environmental stability uniform among the toners of different colors. The toner has a small particle size enough for enabling uniform dispersion and being excellent in color saturation and transparency. The toner also shows higher contribution to the environmental security. The toner includes a coloring agent of which at least a part of the surface is covered with polyhydroxyalkanoate (PHA). The toner is produced by dispersing the coloring agent in aqueous medium, then fixing PHA synthesizing enzyme to the coloring agent dispersed in the aqueous medium, then adding 3-hydroxyacyl CoA, and executing a PHA synthesizing reaction to cover at least a part of the surface of the coloring agent with PHA. The toner thus obtained is used for an image forming method.
Electrostatic charge image developing toner comprising at least a colorant of which at least a part thereof is covered with polyhydroxyalkanoate constituting a first resin component, and binder resin constituting a second resin component.
A method for producing electrostatic charge image developing toner including a colorant obtained by covering at least a part of the surface of a coloring agent with polyhydroxyalkanoate constituting a first resin component, the method comprising execution of a polyhydroxyalkanoate synthesizing reaction utilizing 3-hydroxyacyl CoA as the substrate in the presence of a polyhydroxyalkanoate synthesizing enzyme fixed on the surface of a coloring agent dispersed in aqueous medium to cover at least a part of the surface of said coloring agent with polyhydroxyalkanoate thereby producing said colorant.
Dependencies are inferred from the claim text.