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Resin composition for toner and toner

A technology of resin composition and toner, which is applied in the field of toner, can solve the problem that the thermal paste performance cannot meet the needs, etc., and achieve the effects of speeding up the copying speed, excellent anti-sticking property, and saving energy

Inactive Publication Date: 2008-06-18
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even these methods are not satisfactory in terms of thermal paste performance, so improvements are required
[0008] So far, various methods have been tried; however, none of them can significantly solve the above-mentioned problems

Method used

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  • Resin composition for toner and toner
  • Resin composition for toner and toner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] Using a method similar to that in Preparation 1 of the resin, except that 3 parts of the wax composition A was added in the solvent removal step, a resin composition for toner was obtained.

[0143] Further, after premixing the following with a Henschel mixer: 87 parts of resin composition for toner, 8.0 parts of carbon black (MA100, available from Mitsubishi Chemicals Corp.), 1.0 part of charge control agent (BONTRON S-34 , purchased from Orient Chemical Industries Co., Ltd.) and 3.0 parts of polypropylene wax (Hiwax NP105, Mitsui Chemicals Inc.), the resulting mixture was kneaded at 120°C with a twin-screw extruder, then cooled, ground and pulverized, followed by Classification is performed with a particle size classifier, whereby a toner of 6.0-18.0 μm is obtained. After that, hydrophobic silica gel (R-972, available from Aerosil Corp.) was added from the outside in a ratio of 0.5 parts by weight relative to 100 parts by weight of the aforementioned toner, and the ma...

Embodiment 2-18

[0144] Examples 2-18 and Reference Examples 1-6

[0145] A toner was obtained in a manner similar to that of Example 1 except that the kind of the resin and the kind and amount of the wax composition added were changed. The evaluation results of the toners thus obtained are shown in Table 3.

Embodiment 19

[0147] The same operation as in Example 1 was carried out, adding 3 parts of Hiwax NP105 in the solvent removal step, followed by removing the solvent in the same manner as in Preparation 1 of the resin for toner, thereby obtaining the resin for toner combination. Then, the operation based on Example 1 was performed using this resin composition for toner to obtain a toner. The evaluation results of the toners thus obtained are shown in Table 3.

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Abstract

A resin composition for toners which comprises: (A) a wax composition comprising an ethylene polymer having a melt index as measured at 190 + / - 0.4 DEG C of 0.1 to 100 and either a paraffin wax having a melting point of 70 to 120 DEG C or a Fisher / Tropsch wax having a melting point of 70 to 120 DEG C; and (B) a binder resin for toners.

Description

technical field [0001] The present invention relates to a resin composition for a toner used in electrophotography and the like, and to a toner. Background technique [0002] Electrophotography in copiers and printers generally uses a process that involves electrostatically forming a latent image on a photosensitive material, developing the latent image with a toner, and transferring the toner image to a sheet, such as a sheet of paper, for fixation , followed by pressure fixing of the image with a heat roller (heat roller fixing method). Such a hot roller fixing method requires a toner having good fixing performance that allows fixing at low temperature to improve cost efficiency in terms of power consumption and the like, allows for increased copying speed, and prevents curling of sheets and the like. In addition, with the development of computers, high-definition televisions, etc., the demand for high-quality images and high-definition of reproduced images has been incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/097G03G9/087
CPCG03G9/08782G03G9/08704G03G9/087
Inventor 寺内知哉山本卓内山健治武井宏之
Owner MITSUI CHEM INC