Toner

A technology of toner and colorant, applied in the field of toner, can solve problems such as degradation and poor performance, and achieve the effect of excellent stain resistance and good durability and stability

Active Publication Date: 2013-07-31
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the low-temperature fixability of the toner is improved, the performance of suppressing the occurrence of image defects in continuous printing (hereinafter, referred to as "durable stability ")

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0262] (a) Preparation of solvent

[0263] As the sample solvent, use a mixture of ether and ethanol (1+1 or 2+1), or a mixture of benzene and ethanol (1+1 or 2+1), and use phenolphthalein as an indicator when any such solvent is used. Immediately before the solution of the agent, neutralize it with a solution of 0.1 mol / l potassium hydroxide in ethanol.

[0264] (b) Preparation of phenolphthalein solution

[0265] 1 g of phenolphthalein was dissolved in 100 ml of ethanol (95 v / v %).

[0266] (c) Preparation of a solution of 0.1mol / l potassium hydroxide in ethanol

[0267] Dissolve 7.0 g of potassium hydroxide in as little water as possible. Ethanol (95 v / v%) was added to the solution so that the mixture had a volume of 1 liter. The mixture was left for 2-3 days, then filtered. Calibration was carried out in accordance with JIS-K8006 (basic items concerning titration during reagent content testing).

[0268] (2) Operation

[0269] Accurately weigh 1-20 g of the sample, ...

Embodiment 1

[0433] (Step of forming monomer composition)

[0434] Styrene (St): 70 parts by mass

[0435] n-butyl acrylate (Ba): 30 parts by mass

[0436] Pigment blue 15:3: 8 parts by mass

[0437] Aluminum salicylate compound (BONTRON E-88: manufactured by Orient Chemical Industries Co., Ltd.): 0.5 parts by mass

[0438] The above-mentioned styrene acrylic resin 1: 18 parts by mass

[0439] The above-mentioned sulfonic acid resin 1: 3.5 parts by mass

[0440] Divinylbenzene (DVB): 0.9 parts by mass

[0441] Wax (HNP-10: manufactured by NIPPON SEIRO CO., LTD.): 10 parts by mass

[0442] First, a mixture of the above materials is prepared. Next, 15 mm ceramic beads were added to the mixture, followed by dispersion using an attritor for 3 hours. Then, remove the beads. As a result, a monomer composition was obtained.

[0443] (Step of forming an aqueous dispersion of a dispersant)

[0444] First, 700 parts by mass of ion-exchanged water and 450 parts by mass of 0.1mol / l Na 3 PO ...

Embodiment 2-6， and comparative example 2、4、6-8、10 and 11

[0458] Except that the type and amount of raw materials in Example 1 and the reaction temperature were changed to the conditions shown in Table 5, toners 2-6, 10, 12, 14-16, 18 and 19 were obtained in the same manner as in Example 1. . Tables 6-1 and 6-2 show the physical properties of Toners 2-6, 10, 12, 14-16, 18 and 19. Toners 2-6, 10, 12, 14-16, 18 and 19 were each subjected to performance evaluation in the same manner as in Example 1. Table 7 shows the performance evaluation results of Toners 2-6, 10, 12, 14-16, 18 and 19.

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Abstract

Provided is a toner including toner particles each containing a binder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.

Description

technical field [0001] The present invention relates to a toner used in an electrophotography method or a toner jetting method. Background technique [0002] Electrophotography is expected to meet various needs such as improvement in image quality, miniaturization and weight reduction of devices, realization of higher speed and thus reduction in power consumption, and improvements in fixing performance of toners are required to meet these needs. In particular, there is a need to improve the performance of fixing toner on a transfer material at a reduced temperature (hereinafter, referred to as "low temperature fixability"). [0003] However, when the low-temperature fixability of the toner is improved, the performance of suppressing the occurrence of image defects in continuous printing after storing the toner in a high-temperature, high-humidity environment for a long period of time (hereinafter, referred to as "durable stability "). [0004] In the fixing step, the perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/087G03G9/08
CPCG03G9/0821G03G9/08755G03G9/08726G03G9/08708G03G9/093G03G9/09321G03G9/08771G03G9/08795G03G9/08797G03G9/08G03G9/087
Inventor 绫木保和富永英芳
Owner CANON KK
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