Electrophotographic toner, electrophotographic developer and production method of electrophotographic toner

a technology of electrophotographic developer and toner, which is applied in the field of electrophotographic toner, can solve the problems of insufficient heating of the whole of the toner particle layer, insufficient performance of the toner, and insufficient heating of the toner, so as to improve the offset resistance, improve the thermal stability of storage, and improve the effect of temperature fixability

Active Publication Date: 2009-08-20
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented invention is that it provides an improved type of toner with better properties such as durability against printing pressure and good fixation performance at lower temperatures. Additionally, it has a low melting point and can be easily stored and used without losing its quality.

Problems solved by technology

The technical problem addressed in this patent text relates to improving printing performance and reducing toner stickiness while maintaining good balance properties. This can be achieved by optimizing the composition of toners and developing fasteners with improved durability and stability. Additionally, the patent discusses the importance of achieving excellent low temperature fixing ability and low melting temperature in order to prevent offset caused by toner deposition on the recording medium.

Method used

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  • Electrophotographic toner, electrophotographic developer and production method of electrophotographic toner
  • Electrophotographic toner, electrophotographic developer and production method of electrophotographic toner
  • Electrophotographic toner, electrophotographic developer and production method of electrophotographic toner

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[0215]The present invention will be further described with reference to examples but the embodiments of the invention are by no means limited to these. In the following examples, “part(s)” represents part(s) by mass unless otherwise noted.

[0216]Preparation of Poly-branched Resin Composition Poly-branched resin composition 1:

[0217]Styrene was used as a radical-polymerizable monomer and benzoyl peroxide as a polymerization initiator was added thereto in an amount of 2000 ppm, based on the mass of styrene. Further thereto, 1,6-hexyleneglycol dimethacrylate as a compound having at least two vinyl groups was added in an amount of 125 ppm, based on the mass of styrene. A monomer solution was thus prepared. Subsequently, the monomer solution was heated to a temperature of 108° C., and while maintaining the temperature, the monomer solution was continuously supplied to the first reaction vessel at a supplying rate of 4 liter / hr to perform polymerization. Then, the foregoing solution was supp

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Abstract

An electrophotographic toner which is thermally stable in storage or as an image after being fixed and exhibits a sufficiently low melt viscosity and a high fluidity when heated during fixing is disclosed, comprising a colorant and a binder resin, wherein the binder resin contains a poly-branched resin composition in an amount of 0.5 to 20% by mass. There is also disclosed a method of producing the electrophotographic toner.

Description

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Claims

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Application Information

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Owner KONICA MINOLTA BUSINESS TECH INC
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