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Toner

A toner and colorant technology, applied in the field of toner, can solve problems such as uneven gloss, achieve uniform gloss, prevent end staining, and high gloss

Inactive Publication Date: 2013-09-04
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be effective as a means to provide higher gloss and improve uneven gloss, but requires a substantial improvement in high temperature fouling, especially end fouling
[0010] As mentioned above, there are many technical problems in preventing end fouling while achieving high gloss and gloss uniformity, and there is room for improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0200] As above, the basic constitution and features of the present invention have been described. Hereinafter, the present invention will be specifically described based on examples. However, embodiments of the present invention will not be limited to these.

[0201]

[0202] Terephthalic acid: 100.0mol parts

[0203] Ethylene glycol: 60.0mol parts

[0204] Neopentyl glycol; 40.0mol parts

[0205] A polyester monomer and an esterification catalyst (dibutyltin oxide) were placed in a 5 L autoclave. A reflux cooler, moisture separator, nitrogen inlet, thermometer and stirrer were connected to the autoclave. The polycondensation reaction was performed at 230° C. while nitrogen gas was introduced into the autoclave. The reaction is carried out while the viscosity is used to detect the extent of the reaction. When the reaction reached the second half, 5.0 mol parts of trimellitic anhydride was added. Therefore, trimellitic anhydride is added in the second half of the reac...

preparation example

[0239] Styrene 80.0 parts by mass

[0240] 18.0 parts by mass of n-butyl acrylate

[0241] 2.0 parts by mass of methacrylic acid

[0242] 2,2-bis(4,4-di-tert-butylperoxycyclohexyl)propane 2.4 parts by mass

[0243] While stirring 200 parts by mass of xylene in the four-necked flask, the gas in the container was sufficiently replaced with nitrogen, and the temperature was raised to 120°C. Subsequently, the above-mentioned components were added dropwise over 4 hours. Further, after keeping them under reflux of toluene for 10 hours, the reaction was completed. Under reduced pressure, the solvent was distilled off. Thus, binder resin H-7 was obtained. The physical properties of the resin are shown in Table 3.

[0244]

[0245] Neopentyl glycol: 36.0 mole parts

[0246] Ethylene glycol: 36.0 mole parts

[0247] 1,4-cyclohexanediol: 28.0 mole parts

[0248] Dimethyl terephthalate: 90.0 parts by mole

[0249] Phthalic anhydride: 10.0 parts by mole

[0250] The above-ment...

Embodiment 1

[0253] Binder resin L-1 30 parts by mass

[0254] Binder resin H-1 70 parts by mass

[0255] 90 parts by mass of magnetic iron oxide particles

[0256] (average particle size=0.20μm, Hc=11.5kA / m, δs=88Am 2 / kg, δr=14Am 2 / kg)

[0257] Commercially available low molecular weight polypropylene wax: VISCOL660-P4 parts by mass

[0258] Charge control agent (T-77, manufactured by HODOGAYA CHEMICAL CO., LTD.) 2 parts by mass

[0259] The above-mentioned materials were premixed by a Henschel mixer, and melt-kneaded by a twin-screw kneading extruder. The resulting kneaded product was cooled, pulverized with a hammer mill, and ground with a jet mill. The obtained ground powder was classified using a multi-classifier using the Coanda effect to obtain magnetic toner particles having a weight-average particle diameter (D4) of 7.2 μm and negative chargeability.

[0260] To 100 parts by mass of magnetic toner particles, 1.0 parts by mass of hydrophobic silica fine powder (BET specifi...

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PUM

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Abstract

A toner comprising toner particles, each of which contains a binder resin and a colorant, wherein the binder resin includes a resin having an endothermic peak at a temperature of 55 DEG C to 120 DEG C in a DSC curve; the toner has a softening point Tm of 90 DEG C to 140 DEG C; in the viscoelastic characteristic of the toner measured at a frequency of 6.28 rad / sec, the storage elastic modulus at a temperature of 180 DEG C is 1.0 102 Pa to 1.0 104 Pa; in a chart with the temperature on the x-axis and tand on the y-axis, tand has a peak having a peak top in the range of 50 DEG C to 70 DEG C; tand(P) at the peak top temperature is 2.0 to 10.0; the ratio of the tand (P) at the peak top temperature to tand (Tm) at a temperature of Tm (tand(P) / tand (Tm)) is in the range of 2.5 to 8.0.

Description

technical field [0001] The present invention relates to a toner used in an image forming method using an electrophotography method, an electrostatic recording method, or a toner jet recording method. Background technique [0002] Recently, users have more frequently had the opportunity to output image data captured by digital cameras, digital video cameras, and mobile terminals, and graphic images such as posters, using image forming devices such as digital copiers and digital LBPs. [0003] In the case of outputting an image on high-gloss paper used in this application such as coated paper and coated paper, if the gloss of the image is smaller than that of the paper, the image will give a dull impression and impair the image quality and texture of the image. Therefore, it is necessary to form a high-gloss image for this purpose. [0004] In graphic images, images in which graphic parts and text parts are mixed and have different toner loading amounts are usually output. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/087
CPCG03G9/08702G03G9/08788G03G9/08797G03G9/08755G03G9/08G03G9/087
Inventor 森部修平山崎克久吉羽大辅高桥彻辻本大祐藤本雅己
Owner CANON KK