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Toner and double-component developer

A two-component developer and toner technology, applied in the directions of developers, instruments, optics, etc., can solve the problems that it is difficult to control the state of the release agent, and it is difficult to satisfy low-temperature fixability and developability at the same time

Inactive Publication Date: 2008-12-31
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, although this toner is spheroidized to improve scattering and transferability, it is difficult to control the presence of the release agent near the surface of the toner that is spheroidized by hot air treatment, and it is difficult to satisfy low-temperature fixability and developability at the same time.

Method used

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  • Toner and double-component developer
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  • Toner and double-component developer

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Experimental program
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preparation example Construction

[0090] In the above-mentioned production methods (1) to (6), polymer units having various molecular weights and degrees of crosslinking can be used as the vinyl polymer unit and the polyester unit.

[0091] As the binder resin contained in the toner of the present invention, a mixture of the above-mentioned polyester resin and hybrid resin can be used.

[0092]As the binder resin contained in the toner of the present invention, a mixture of the above-mentioned polyester resin and vinyl polymer can be used.

[0093] As the binder resin contained in the toner of the present invention, a mixture of the above-mentioned hybrid resin and vinyl polymer can be used.

[0094] The glass transition temperature of the binder resin contained in the toner of the present invention is preferably 40 to 90°C, more preferably 45 to 85°C. In addition, the acid value of the binder resin is preferably 1 to 40 mgKOH / g.

[0095] In the toner of the present invention, a known charge control agent ca...

Embodiment

[0252] The present invention is illustrated by the following specific examples, but the invention is not limited to these examples.

manufacture example

[0254] 2.0 mol of styrene, 0.21 mol of 2-ethylhexyl acrylate, 0.14 mol of fumaric acid, 0.03 mol of dimer of α-methylstyrene and 0.05 mol of dicumyl peroxide are used as vinyl polymer units The material was added to the dropping funnel. Then polyoxypropylene (2.2)-2,2-bis(4-hydroxyphenyl)propane 7.0mol, polyoxyethylene (2.2)-2,2-bis(4-hydroxyphenyl)propane 3.0mol, p-benzene 3.0 mol of dicarboxylic acid, 1.9 mol of trimellitic anhydride, 5.0 mol of fumaric acid, and 0.2 g of dibutyltin oxide were charged into a 4-liter glass four-hole flask as materials for the polyester unit. A thermometer, a stirring bar, a condenser, and a nitrogen introduction tube were installed on the four-hole flask, and placed in a mantle-type resistance heater. Then, after the gas in the flask was replaced with nitrogen, the temperature was slowly raised while stirring, and the stirring was continued at a temperature of 145° C., and the monomer of the ethylene polymer unit and the polymerization initi...

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Abstract

The present invention provides a toner, which is a toner containing toner particles containing at least a binder resin, a colorant, and a release agent, and inorganic fine particles, the binder resin containing at least polyester unit, the toner has a weight-average particle diameter of 3.0 to 6.5 μm, the average circularity of particles having an equivalent circle diameter of 2 μm or more contained in the toner is 0.920 to 0.945, and the toner has BET specific surface area is 2.1m 2 / g to 3.5m 2 / g, the transmittance of the 600nm wavelength light of the dispersion obtained by dispersing the toner in 45% by volume of methanol aqueous solution is 30% to 80%. The present invention also provides a two-component developer containing the toner and a magnetic carrier, the magnetic carrier has a magnetic core particle and a coating layer covering the core particle, the number average particle diameter of the magnetic carrier is 15- 80 μm. By using the toner and developer, a high-quality image can be formed at high speed even in an oil-free fixing method.

Description

technical field [0001] The present invention relates to a toner used in electrophotography, electrostatic printing, and toner inkjet system recording, and a two-component developer containing the toner. Background technique [0002] In recent years, in the full-color copiers and full-color printers that have been developed, the following method is generally adopted to obtain full-color images, that is, using four photoreceptors and a belt-shaped transfer body, and transferring the static electricity formed on each photoreceptor to The image is developed with cyan toner, magenta toner, yellow toner, and black toner, and the transfer material on the photoreceptor is sequentially transferred while conveying the transfer material between the photoreceptor and the belt-shaped transfer body. Toner image, a method of forming a full-color image; on the surface of the transfer body facing the photoreceptor, the transfer material is rolled up by electrostatic force or mechanical actio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/08G03G9/087G03G9/097G03G9/10G03G9/113
CPCG03G9/0819G03G9/0821G03G9/0827G03G9/08702G03G9/08742G03G9/08755G03G9/10G03G9/1134G03G9/107
Inventor 马场善信佐藤祐弘藤田亮一上泷隆晃菅原庸好寺内和男板仓隆行
Owner CANON KK
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