Electric photographic toner and its manufacture, electric photographic developer and imaging method

A technology of toner and electrophotography, which is applied in the directions of developer, electrography, optics, etc., and can solve problems such as inability to achieve low-temperature fixing

Inactive Publication Date: 2005-03-02
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there is no problem in anti-blocking and image storage abili

Method used

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  • Electric photographic toner and its manufacture, electric photographic developer and imaging method
  • Electric photographic toner and its manufacture, electric photographic developer and imaging method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0192] Synthesis of crystalline polyester resin 1

[0193] 301 parts by weight of dimethyl terephthalate, 248 parts by weight of 1,9-nonanediol, and 0.3 parts by weight of a dibutyltin compound as a catalyst were placed in a two-necked flask that had been heated and dried. Then, the air in the vessel was removed, an inert atmosphere was made with nitrogen by a decompression operation, and the mixed solution was stirred at 180° C. for 5 hours by mechanical stirring.

[0194] Thereafter, the temperature was gradually raised to 230°C under reduced pressure, and the mixture was stirred for 2 hours. When the mixture became viscous, the reaction was quenched by air cooling the mixture. Thus, 340 parts by weight of crystalline polyester resin 1 (a crystalline polyester resin comprising an acid-derived component in which the content of an aromatic dicarboxylic acid-derived component is 100 mol % ( Composition), and an alcohol-derived component, wherein the content of the aliphatic d...

Embodiment 2

[0232] Synthetic crystalline polyester resin 2

[0233] Except that the amount of dimethyl terephthalate added in Example 1 "Synthesis of Crystalline Polyester Resin 1" was changed to 194 parts by weight, 248 parts by weight of 1,9-nonanediol was used with 216 parts by weight of 1, Instead of 11-undecanediol, 330 parts by weight of crystalline polyester resin 2 (a crystalline polyester resin comprising an acid-derived component in which, Aromatic dicarboxylic acid-derived components in an amount of 100 mol% (composition), and an alcohol-derived component in which a dihydric alcohol-derived component has a content of 100 mol% (composition)).

[0234] The weight-average molecular weight (Mw) of the crystalline polyester resin 2 (measured by gel permeation chromatography (polystyrene conversion)) was 9300, and the number-average molecular weight (Mn) was 4400.

[0235] Further, the melting point (Tm) of the crystalline polyester resin 2 was measured by differential scanning calo...

Embodiment 3

[0242] Synthetic crystalline polyester resin 3

[0243] Except that the amount of dimethyl terephthalate added in Example 1 "Synthesis of Crystalline Polyester Resin 1" was changed to 200 parts by weight, the amount of 1,9-nonanediol was changed to 188 parts by weight, and 8.5 The dimethyl fumarate of weight part, the 5-sulfoisophthalate sodium of 26 weight parts and the dimethylsulfoxide of 200 weight parts, synthesize the crystallization of 340 weight parts in the same way as Example 1 Shaped polyester resin3.

[0244] The obtained crystalline resin 3 was measured according to NMR (solvent: dimethylformamide-d7, TMS standard). In the composition obtained from the acid, the content of the composition obtained from terephthalic acid (8.1ppm) was 87.5mol% (composition), sodium 5-sulfoisophthalate (8.5ppm and 8.6ppm) The content of the obtained composition component was 7.5 mol % (composition), and the content of the obtained composition component of fumaric acid (6.8 ppm) was...

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Abstract

An electrophotographic toner contains a colorant and a binder resin which includes and a crystalline polyester resin as a main component. An ester density M of the crystalline polyester resin, as defined in the following Formula 1, is from 0.01 to 0.12: M=K/A Formula 1 wherein M denotes an ester density, K denotes a number of ester groups, and A denotes a number of atoms which constitute the high molecular chain of a polymer.

Description

technical field [0001] The present invention relates to an electrophotographic toner used in an electrophotographic apparatus such as a copying machine, a printer, a facsimile machine, etc. using an electrophotographic process, a method of producing the toner, an electrophotographic developer, and an image forming method . Background technique [0002] As disclosed in Japanese Patent Application Laid-Open No. 23910 / 1967 and similar documents, various electrophotographic methods are currently known. Generally, a latent image is electrically formed on the surface of a photoreceptor (latent image holding material) using a photosensitive substrate in one of various ways. The formed latent image is developed with toner, and thus a toner image is formed. Thereafter, the toner image on the surface of the photoreceptor is transferred to the surface of a transfer material such as paper or the like with or without an intermediate transfer material. The transferred image is subjecte...

Claims

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Application Information

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IPC IPC(8): G03G9/08G03G9/087
CPCG03G9/08797G03G9/08755G03G9/08795G03G9/08771G03G9/08
Inventor 大门克己福岛纪人今井孝史芹泽学滨野弘一市村正则
Owner FUJIFILM BUSINESS INNOVATION CORP
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