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Electrophotographic toner and production method of the same

A manufacturing method and toner technology, which can be used in developing agents, instruments, electrographics, etc., and can solve problems such as low strength and carrier contamination.

Active Publication Date: 2013-04-03
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in toners containing low-molecular-weight polyester resins such as Patent Document 1 and Patent Document 2, the strength of such polyester resin is low, thereby causing filming on the photoreceptor, and when using a two-component developer as a developing Carrier contamination and other problems will occur when

Method used

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  • Electrophotographic toner and production method of the same
  • Electrophotographic toner and production method of the same
  • Electrophotographic toner and production method of the same

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example (1

[0156] First, in the first synthesis process, an unmodified polyester resin as a raw material polyester prepolymer and a triphenylimidazole compound represented by formula (2-1) as a specific triphenylimidazole compound are reacted, Thus, the carboxyl group of the unmodified polyester resin and the amino group of the triphenylimidazole compound represented by the formula (2-1) are bonded by reaction, thereby forming a connection composed of a composite group of the carboxyl group and the amino group. The site, that is, the connection site having the structure represented by formula (a), thereby introducing the triphenylimidazole group into the raw polyester prepolymer, and synthesizing the prepolymer into which the triphenylimidazole group was introduced.

[0157] Next, in the second synthesis process, the imidazole rings of the prepolymers into which triphenylimidazole groups have been introduced are subjected to a reaction treatment in which the imidazole rings are bonded, wh...

Synthetic example (2

[0159] In the first synthesis process, the amino-modified polyester resin as the raw material polyester prepolymer and the triphenylimidazole compound represented by the formula (2-4) as the specific triphenylimidazole compound are reacted, thereby , the amino group of the amino-modified polyester resin and the carboxyl group of the triphenylimidazole compound represented by the formula (2-4) are bonded by reaction, thereby forming a linking site with a structure represented by the formula (a), and the A triphenylimidazole group was introduced into a raw material polyester prepolymer to synthesize a triphenylimidazole group-introduced prepolymer.

[0160] Next, in the second synthesis process, a reaction treatment is performed to bond the imidazole rings between the triphenylimidazole group-introduced prepolymers, whereby the two triphenylimidazole group-introduced prepolymers pass through The polyester resin in which L in the general formula (1) is a group represented by the ...

Synthetic example (3

[0162] In the first synthesis process, the unmodified polyester resin as the raw material polyester prepolymer and the triphenylimidazole compound represented by the formula (2-2) as the specific triphenylimidazole compound are reacted to avoid The carboxyl group of the modified polyester resin and the hydroxyl group of the triphenylimidazole compound represented by the formula (2-2) are bonded by reaction, thereby forming a linking site composed of a composite group of the carboxyl group and the hydroxyl group, i.e. The linking site having the structure represented by the formula (b) introduced the triphenylimidazole group into the raw polyester prepolymer, and synthesized the triphenylimidazole group-introduced prepolymer.

[0163] Next, in the second synthesis process, a reaction treatment is performed to bond the imidazole rings between the triphenylimidazole group-introduced prepolymers, whereby the two triphenylimidazole group-introduced prepolymers pass through A specif...

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Abstract

Provided is a toner containing toner particles containing a polyester resin which has a structure part represented by Formula (1): wherein, “A” represents a polyester structure unit having at least one linking group; R1 represents a hydrogen atom, or a chlorine atom; R2 represents a hydrogen atom, a chlorine atom, or a methoxy group; and “L” represents a divalent organic group.

Description

technical field [0001] The present invention relates to a toner and a method for producing the same. Background technique [0002] Conventionally, in an image forming method for forming a visible image by an electrophotography method, as a method of fixing a toner image formed on an image carrier such as paper using toner, heat is used to fix the toner image formed. The heat fixing method of fixing the image carrier is widely used. In order to secure the fixability in this heat fixing method, that is, the adhesiveness of the toner to the image carrier, a certain degree of high heat is required. [0003] However, in recent years, in order to prevent global warming, energy saving is also required in electrophotographic image forming apparatuses using thermal fixing methods. That is, a material having low-temperature fixability serves as a toner, thereby reducing the amount of heat required for fixing a toner image. In addition, in order to obtain low-temperature fixability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/08G03G9/087
CPCG03G9/08755G03G9/0802G03G9/08793G03G9/08795G03G9/08791
Inventor 神山干夫大村健林健司小畑裕昭柴田幸治
Owner KONICA MINOLTA BUSINESS TECH INC
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