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Toner for electrostatic image development, production method of the toner and image formation method

A technology of electrostatic charge image and manufacturing method, which is applied in the directions of developer, electrography, instrument, etc., can solve the problems of charge quantity fluctuation, browning, color development obstacle of color toner, etc. The effect of the change in electricity

Active Publication Date: 2014-09-24
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when a compound having such a furfural skeleton is used as the binder resin, the binder resin may be colored or browned due to oxidation or the like
In addition, the binder resin tends to interact with moisture in the atmosphere under high temperature and high humidity, which may cause changes in the charge amount due to environmental differences
Therefore, the use of this binder resin may cause color development failure of the color toner, so it is not suitable as a binder resin for color toners.

Method used

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  • Toner for electrostatic image development, production method of the toner and image formation method
  • Toner for electrostatic image development, production method of the toner and image formation method
  • Toner for electrostatic image development, production method of the toner and image formation method

Examples

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Embodiment 1

[0200] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. It should be noted that the expressions of "part" or "%" are used in the examples, and unless otherwise specified, "parts by mass" or "% by mass" are used.

[0201] [Synthesis of Monomer]

[0202]

[0203] To a solution (200ml) of 5-hydroxymethylfurfural (12.6g, 100mmol), triethylamine (29.2ml, 210mmol) in dichloromethane, under nitrogen flow, add methacryloyl chloride (8.5ml) dropwise at 0°C , 105 mmol), stirred at room temperature for one day to prepare a reaction mixture. Use 1N-HCL (200ml×2), saturated NaHCO 3 aqueous solution (200ml × 1), saturated NaCl aqueous solution (200ml × 1) to wash the reaction mixture, with anhydrous MgSO 4 Dry and filter. The solvent of the filtrate thus obtained was distilled off under reduced pressure to obtain a crude product of monomer A. It was separated by silica gel column chromatogr...

preparation example 1

[0223] (1) Preparation process of colorant particle dispersion

[0224] 11.5 parts by mass of sodium lauryl sulfate was added to 160 parts by mass of ion-exchanged water, dissolved and stirred to prepare an aqueous surfactant solution. To this aqueous surfactant solution, 15 parts by mass of a colorant (C.I. Pigment Orange 36) was gradually added, followed by dispersion treatment using a mechanical disperser "CREARMIX" (manufactured by M-TECHNIQUE Co., Ltd.) to prepare fine particles in which the colorant was dispersed. Colorant particle dispersion [Or].

[0225] (2) Preparation of resin particle dispersion [A1]

[0226] (a) Step 1 aggregation

[0227] In the reaction vessel equipped with a stirring device, a temperature sensor, a condenser, and a nitrogen introduction device, add a surface active compound obtained by dissolving 4 parts by mass of polyoxyethylene (2) sodium lauryl ether sulfate in 3000 parts by mass of ion-exchanged water. The solution was prepared, and the...

preparation example 2

[0240] An orange toner [B1] was prepared in the same manner as in Preparation Example 1 of the orange toner except that the monomer A was changed to the monomer B.

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PUM

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Abstract

The present invention provides a toner for electrostatic image development that suppresses the fluctuation of electrostatic charge amount in accordance with environmental fluctuation and has good color reproducibility (wide color gamut), a producing method of the toner, and an image forming method using the toner for electrostatic image development. The toner for electrostatic image development of the invention includes a toner particle that contains at least a binder resin. The toner particle includes a polymer having a structural unit represented by a following general formula (1) as the binder resin.

Description

technical field [0001] The present invention relates to a toner for developing an electrostatic charge image and a method for producing the same. In addition, it relates to an image forming method using the toner for developing an electrostatic charge image. More specifically, it relates to a toner for developing an electrostatic image that suppresses a decrease in charge amount under high temperature and high humidity and has good color reproducibility, and a method for producing the same. Background technique [0002] In the process of energy saving, in the field of electrophotography, energy reduction (lower temperature fixing) of fixing devices has been sought in recent years in order to reduce power consumption and high-speed printing. However, with low-temperature fixing, the thermal stability of the toner for electrostatic charge image development (hereinafter, simply referred to as (toner)) decreases, and the heat-resistant storage property of the toner during stora...

Claims

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Application Information

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IPC IPC(8): G03G9/087
CPCG03G9/08744G03G9/08724G03G9/08735G03G9/08726G03G9/08711G03G9/08791G03G9/08722G03G9/0874
Inventor 午菴一贺神山干夫田所肇
Owner KONICA MINOLTA INC
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