WO2010120059A2 - Procédé de production d'une encre en poudre (toner) - Google Patents

Procédé de production d'une encre en poudre (toner) Download PDF

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Publication number
WO2010120059A2
WO2010120059A2 PCT/KR2010/002092 KR2010002092W WO2010120059A2 WO 2010120059 A2 WO2010120059 A2 WO 2010120059A2 KR 2010002092 W KR2010002092 W KR 2010002092W WO 2010120059 A2 WO2010120059 A2 WO 2010120059A2
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WIPO (PCT)
Prior art keywords
polyester resin
dispersion
toner
wax
solvent
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PCT/KR2010/002092
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English (en)
Korean (ko)
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WO2010120059A3 (fr
Inventor
황일선
황대일
이준희
최대웅
김윤나
심상은
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삼성정밀화학(주)
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Publication of WO2010120059A2 publication Critical patent/WO2010120059A2/fr
Publication of WO2010120059A3 publication Critical patent/WO2010120059A3/fr

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/087—Binders for toner particles
    • G03G9/08742—Binders for toner particles comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/08755—Polyesters
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/0802—Preparation methods
    • G03G9/0804—Preparation methods whereby the components are brought together in a liquid dispersing medium
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/0802—Preparation methods
    • G03G9/0804—Preparation methods whereby the components are brought together in a liquid dispersing medium
    • G03G9/0806—Preparation methods whereby the components are brought together in a liquid dispersing medium whereby chemical synthesis of at least one of the toner components takes place
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/0819—Developers with toner particles characterised by the dimensions of the particles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/087—Binders for toner particles
    • G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
    • G03G9/08791—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775 characterised by the presence of specified groups or side chains

Definitions

  • the present invention relates to a method of manufacturing a toner, and more particularly, to a method of manufacturing a toner, which is easy to control the structure of the toner and can secure both the fixing of the produced toner and the improvement of high temperature storage stability.
  • toner is produced by adding a colorant, a charge control agent, a mold release agent, or the like to a thermoplastic resin serving as a binder resin. Further, in order to impart fluidity to the toner or to improve physical properties such as charge control or cleaning property, fine inorganic metal powders such as silica and titanium oxide may be added to the toner as an external additive.
  • toner production methods there are physical methods such as grinding method and chemical methods such as suspension polymerization method and emulsion aggregation method.
  • the toner production method by polymerization involves radical polymerization, only vinyl resin can be used as the binder resin. In this case, however, it is difficult to completely terminate the polymerization, so that unreacted monomers, surfactants, and the like remain in the toner particles, thereby deteriorating the charge characteristics of the toner particles.
  • Polyester resins are suitable for high-speed printers or color printers because they have the advantages of improved pigment dispersibility, excellent transparency, low fixation temperature, narrow glass transition temperature, and the like, than vinyl resins such as styrene-acrylic copolymer resins. .
  • a material containing a polyester resin and a colorant is dispersed in a solvent in which the polyester resin is soluble, and the dispersion is granulated in a water medium containing an inorganic dispersant and then the solvent.
  • a method of manufacturing the toner by removing JP-A-7-152202. In this method, it takes a long time to completely remove the used solvent, which is difficult to perform industrially, and may stress the toner during the removal, which may affect the toner properties.
  • Another toner preparation method is to add a pigment dispersion prepared by dispersing sodium sulfonated polyester and pigment in water, to an emulsion in which sodium sulfonated polyester is dispersed in water, and adding an alkali halide solution to form aggregates and toner.
  • a method for producing Japanese Patent Laid-Open No. 10-39545.
  • This toner manufacturing method uses sodium sulfonated polyester and provides a toner composition by agglomerating a pigment dispersed in water and sodium sulfonated polyester dispersed in water, so that it is unnecessary to use organic solvents, monomers, surfactants and the like.
  • a toner composition containing no component can be prepared.
  • the toner composition prepared by this method has a problem in that its charging characteristics are unstable due to environmental conditions and thus its use is limited, which is believed to be derived from a sulfonic acid group which is a hydrophilic group.
  • an object of the present invention is to provide a method for producing a toner having excellent high temperature storage stability and excellent fixability in a method for producing a toner using a polyester resin as a binder resin.
  • Preparing a solvent emulsion by stirring a mixture of a dispersion stabilizer, a surfactant, a polar solvent, and an organic solvent that is incompatible with the polar solvent;
  • a manufacturing method of a toner comprising fusing the aggregated toner particles.
  • the dispersion stabilizer may be an inorganic base.
  • the organic solvent is methyl acetate, ethyl acetate, isopropyl acetate, methyl ethyl ketone, dimethyl ether, diethyl ether, 1,1-dichloroethane, 1,2-dichloroethane, dichloromethane and It may be at least one selected from the group consisting of chloroform.
  • the surfactant may be an anionic surfactant or a nonionic surfactant.
  • the sulfonic acid group-free polyester resin may have a weight average molecular weight of 6,000 to 100,000, and a glass transition temperature of 40 to 80 °C.
  • toner particles having a narrow particle size distribution, excellent high temperature storage stability, and excellent fixability can be provided.
  • Toner manufacturing method comprises the steps of preparing a solvent emulsion by stirring a mixture of a dispersion stabilizer, a surfactant, a polar solvent and an organic solvent incompatible with the polar solvent;
  • the toner manufacturing method may further include washing and drying the fused toner particles.
  • Dispersion manufacturing process can be divided into three categories. That is, polyester resin dispersion preparation, colorant dispersion preparation, and wax dispersion preparation are included.
  • a solvent emulsion is prepared by adding an organic solvent incompatible with the polar solvent to a polar solvent containing a surfactant and a dispersion stabilizer, and then adding a sulfonic acid group-free polyester resin in a solid state to Make ester dispersion.
  • a sulfonic acid group-free polyester is used, it is dispersed in a polar solvent containing a dispersion stabilizer, thereby making it possible to prepare a stable dispersion.
  • the sulfonic acid group-free polyester resin terminal is ionized by the dispersion stabilizer to form a stable dispersion state.
  • the polar solvent includes water, methanol, ethanol, butanol, acetonitrile, acetone, ethyl acetate and the like, and water is most preferred.
  • the weight average molecular weights of the polyester resin used for this invention are 6,000-100,000, and less than 6,000 tends to worsen storage property and fixability, and larger than 100,000 tends to disperse
  • the polyester resin preferably has an acid value of 12 to 20.
  • the polyester resin is obtained by polycondensing an acid component and an alcohol component, preferably a polyester resin using a polyhydric carboxylic acid mainly for the acid component and a polyhydric alcohol mainly for the alcohol component.
  • polyhydric alcohol component examples include polyoxyethylene- (2,0) -2,2-bis (4-hydroxyphenyl) propane and polyoxypropylene- (2,0) -2,2-bis (4 -Hydroxyphenyl) propane, polyoxypropylene- (2,2) -polyoxyethylene- (2,0) -2,2-bis (4-hydroxyphenyl) propane, polyoxyethylene- (2,3) -2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene- (6) -2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene- (2,3) -2,2 -Bis (4-hydroxyphenyl) propane, polyoxypropylene- (2,4) -2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene- (3,3) -2,2-bis (4-hydroxyphenyl) propane, polyoxyethylene- (6) -2,2-bis (4-hydroxyphenyl) propane, ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, 1, 4-but
  • the polyhydric carboxylic acid component specifically includes aromatic polyhydric acids and / or alkyl esters thereof commonly used in polyester resin production.
  • aromatic polyacids include terephthalic acid, isophthalic acid, trimellitic acid, pyromellitic acid, 1,2,4-cyclohexanetricarboxylic acid, 2,5,7-naphthalenetricarboxylic acid, 1,2,4-naphthalenetricarboxylic acid , 1,2,5-hexanetricarboxylic acid, 1,2,7,8-octane tetracarboxylic acid, and / or alkyl esters of these carboxylic acids, wherein the alkyl group includes methyl, ethyl, propyl, butyl, and the like. have.
  • the aromatic polyacids and / or alkyl esters thereof may be used alone or in combination of two or more thereof.
  • the glass transition temperature is lower than 40 ° C., the toner formed by using the polyester resin particles may cause storage stability problems.
  • the glass transition temperature exceeds 80 °C, the offset is likely to occur, especially in color printing, the problem may be more serious.
  • an inorganic base can be used, Preferably, 1 or more types chosen from the group which consists of sodium hydroxide, potassium hydroxide, and aluminum hydroxide can be used.
  • the organic solvent is 1 selected from the group consisting of methyl acetate, ethyl acetate, isopropyl acetate, methyl ethyl ketone, dimethyl ether, diethyl ether, 1,1-dichloroethane, 1,2-dichloroethane, dichloromethane, and chloroform. Although more than 1 type can be used, it is not necessarily limited to these.
  • the surfactant in the polyester resin dispersion is preferably used in an amount of 1 to 4 parts by weight and an organic solvent in an amount of 15 to 200 parts by weight based on 100 parts by weight of the polyester resin, and the dispersion stabilizer is 2 to 3 relative to the acid value of the polyester resin. Preference is given to using in equivalent amounts.
  • the colorant dispersion may be dispersed in water using a dispersant such as a surfactant, or may be dispersed using an organic solvent.
  • a dispersant such as a surfactant
  • anionic surfactants and nonionic surfactants are preferable, and anionic surfactants are more preferable.
  • a dispersion is prepared using a master batch in which a pigment and a polyester resin are kneaded. Specifically, after the master batch and the solvent are put into a ball mill and milled for about 24 hours, the mixed solution is added to water containing a surfactant and a dispersion stabilizer to obtain a master batch pigment dispersion. Moreover, you may disperse
  • the dispersion stabilizer used may be a dispersion stabilizer used in preparing a polyester resin dispersion.
  • the use of the master batch pigment dispersion results in better color development after toner production than when the pigment dispersion is used.
  • the colorant may be appropriately selected from black pigments, cyan pigments, magenta pigments, yellow pigments, and mixtures thereof, which are commonly used pigments.
  • the content of the colorant may be sufficient to color the toner to form a visible image by development, for example, preferably 3 to 15 parts by weight based on 100 parts by weight of the resin. If the content is less than 3 parts by weight, the coloring effect may be insufficient. If the content is more than 15 parts by weight, the electric resistance of the toner is lowered, so that sufficient triboelectric charge may not be obtained, resulting in contamination.
  • Wax dispersions can be prepared by dispersing natural or synthetic waxes in water or in organic solvents.
  • wax a known wax can be used.
  • natural waxes such as carnauba wax and rice wax
  • synthetic waxes such as polypropylene wax and polyethylene wax
  • petroleum wax such as montan wax, alcohol wax, and ester wax etc.
  • Wax may be used individually by 1 type, and may use 2 or more types together.
  • a dispersion is obtained by using a surfactant or a dispersion stabilizer and dispersing using a disperser such as a high pressure or high speed homogenizer.
  • the wax can be dispersed in the same manner as in the case of producing a polyester resin dispersion. That is, a solvent emulsion is prepared by adding an organic solvent to water containing a surfactant and a dispersion stabilizer, and a wax is added to a solid state to prepare a dispersion.
  • wax content 0.5-20 weight part is preferable with respect to 100 weight part of polyester resins, and 1-10 weight part is more preferable.
  • the toner particles are agglomerated by mixing the respective dispersions prepared in the above dispersion preparation step and then adding a flocculant with stirring.
  • the coagulation process is preferably performed at room temperature, it may be heated up to the glass transition temperature (Tg) of the polyester resin, and the particle diameter and shape are uniform by stirring the mixed liquid of each dispersion liquid by using a stirrer and mechanical shear force. Agglomerates can be formed in one particle state.
  • a flocculant used in this process can use a well-known thing,
  • the organic substance etc. which contain the electrolyte or the ion of opposite polarity to a pigment can be used.
  • the amount of the flocculant used is 0.5 to 20% by weight, preferably 0.5 to 18% by weight based on the total solids. If the amount of the flocculant is less than 0.5% by weight, aggregation may not occur, and when the amount of the flocculant is greater than 20% by weight, the aggregated particles may be too large.
  • Tg glass transition temperature
  • the surface properties of the particles can be improved by heating to a temperature above the glass transition temperature (Tg) of the polyester resin, and the polyester resin dispersion or polystyrene butylacryl before heating to a temperature above the glass transition temperature (Tg) of the polyester resin.
  • the latex is added to cover the toner particles generated in the flocculation process once, thereby preventing the pigment or wax contained therein from coming out and making the toner firm.
  • the polyester resin dispersion or polystyrene butyl acrylate latex to be added may use a resin dispersion having the same physical properties (Tg, molecular weight) as the polyester resin dispersion used in the flocculation step. You may use it.
  • Tg When using Tg and the thing with high molecular weight, Tg is 60-85 degreeC and it is preferable that molecular weight is 10,000-300,000.
  • the additionally added resin dispersion may have a larger particle size while wrapping the toner particles produced in the flocculation step.
  • a surfactant is added or a pH is adjusted, and the temperature is above the glass transition temperature of the polyester resin. The temperature is raised to proceed with the fusion process.
  • the toner particles obtained in the fusion process are washed with water and dried.
  • the mixed liquid containing toner is cooled to room temperature, the mixed liquid is filtered, the filtrate is removed, and the toner is washed with water.
  • the washing of the toner using pure water may be performed batchwise or continuously.
  • the cleaning of the toner using pure water is performed to remove unnecessary components other than toner components such as impurities that may affect the chargeability of the toner and unnecessary coagulants that do not participate in aggregation.
  • the obtained toner is dried using a fluidized bed dryer, a flash jet dryer, or the like.
  • a desired external additive may be added to the toner obtained by drying.
  • a 3L reactor equipped with a stirrer, a nitrogen gas inlet, a thermometer, and a cooler was installed in the oil chain oil tank.
  • 50 g of terephthalic acid, 47 g of isophthalic acid, 80 g of 1,2-propylene glycol, and 3 g of trimellitic acid were added to the reactor thus installed, and 500 ppm of dibutyltin oxide was added to the total weight of the monomer as a catalyst.
  • the temperature was raised to 150 ° C. while the reactor was stirred at 150 rpm.
  • the reaction was carried out for 6 hours, the temperature was raised to 220 ° C., the reactor was depressurized to 0.1torr to remove the side reactants, and the reaction was performed for 15 hours under the same pressure condition to obtain a polyester resin (1).
  • a 3 L reactor equipped with a stirrer, thermometer, condenser and nitrogen inlet was installed in the oil bath.
  • 97 g of dimethyl terephthalate, 96 g of dimethylisophthalate, 0.15 g of dimethyl 5-sulfoisophthalate sodium salt, 175 g of 1,2-propylene glycol and 4.0 g of trimellitic acid were added to the reactor.
  • tetrabutyl titanate was added as a polymerization catalyst in an amount of 500 ppm relative to the total weight of the monomers.
  • the temperature was then raised to 150 ° C. while maintaining the reactor stirring rate at 100 rpm. After this, the reaction was allowed to proceed for about 5 hours.
  • the glass transition temperature, acid value and weight average molecular weight of the polyester resin obtained in the above production example were measured according to the following measuring method, and the results are shown in Table 1 below.
  • the sample was heated to 20 ° C. to 200 ° C. at a heating rate of 10 ° C./min, quenched to 10 ° C. at a cooling rate of 20 ° C./min, and then again to 10 ° C. It measured by heating up at the heating rate of / min.
  • the acid value (mgKOH / g) was measured by dissolving the resin in dichloromethane, cooling it, and titrating with 0.1 N KOH methyl alcohol solution.
  • the weight average molecular weight of the binder resin was measured by gel permeation chromatography (GPC) using a calibration curve using a polystyrene reference sample.
  • the polyester resin dispersion (1) having a solid content concentration of 17% was obtained.
  • the average particle diameter of the dispersed particles of the polyester resin dispersion was 0.3 ⁇ m.
  • the average particle diameter was measured by a Melbourne particle size analyzer (Malvern Instruments Ltd, UK).
  • a polyester resin dispersion (2) was obtained in the same manner as the method for producing the polyester resin dispersion (1), except that the polyester resin (2) was used instead of the polyester resin (1).
  • the average particle diameter of the dispersed particle of this polyester resin dispersion liquid was 0.9 micrometer.
  • a polyester resin dispersion (3) was obtained in the same manner as the method for producing the polyester resin dispersion (1), except that the polyester resin (3) was used instead of the polyester resin (1).
  • the average particle diameter of the dispersed particles of this polyester resin dispersion was 0.7 ⁇ m.
  • a polyester resin dispersion (4) was obtained in the same manner as the method for producing the polyester resin dispersion (1), except that the polyester resin (4) was used instead of the polyester resin (1).
  • the average particle diameter of the dispersed particle of this polyester resin dispersion liquid was 0.8 micrometer.
  • a polyester resin dispersion (5) was obtained in the same manner as the method for producing the polyester resin dispersion (1), except that the polyester resin (5) was used instead of the polyester resin (1).
  • the average particle diameter of the dispersed particle of this polyester resin dispersion liquid was 1.2 micrometers.
  • 60 g of the prepared black pigment master batch was placed in a ball mill container, and 3 kg, 1 mm, and 0.5 mm balls of 0.5 kg each were added, and 200 g of methyl ethyl ketone was added and milled at 100 rpm for 24 hours. Since the dispersion obtained after milling was not yet uniformly dispersed, it was dispersed in a reactor containing 60 g of water, 4.3 g of a surfactant, and 10 ml of a dispersion stabilizer, thereby preparing a master batch pigment dispersion having a particle size of 0.8 ⁇ m. The organic solvent was removed by reducing the pressure to 0.3torr at a temperature of 60 °C.
  • a master batch pigment dispersion (2) was prepared in the same manner as the production method of the master batch pigment dispersion (1), except that the polyester resin (2) was used instead of the polyester resin (1).
  • a master batch pigment dispersion (3) was prepared in the same manner as the preparation method of the master batch pigment dispersion (1), except that the polyester resin (3) was used instead of the polyester resin (1).
  • a master batch pigment dispersion (4) was prepared in the same manner as the production method of the master batch pigment dispersion (1), except that the polyester resin (4) was used instead of the polyester resin (1).
  • a wax dispersion (2) was obtained by the same method as the method for producing the wax dispersion (1), except that the polyester resin (2) was used instead of the polyester resin (1). Polyester and wax dispersion liquid whose particle size is 0.2-1 micrometer were obtained.
  • a wax dispersion (3) was obtained by the same method as the method for producing the wax dispersion (1), except that the polyester resin (3) was used instead of the polyester resin (1). Polyester and wax dispersion liquid whose particle size is 0.5-1.0 micrometer were obtained.
  • a wax dispersion (4) was obtained by the same method as the method for producing the wax dispersion (1), except that the polyester resin (4) was used instead of the polyester resin (1). Polyester and wax dispersion liquid whose particle size is 0.5-1.0 micrometer were obtained.
  • the polyester resin dispersion (1), the master batch pigment dispersion (1), and the wax dispersion (1) were mixed at the solid content concentration shown in Table 2 below to obtain a mixed solution. At this time, it adjusted with pure water so that total solid concentration might be 14 weight%. 8.6g of 1N magnesium chloride aqueous solution was put into this mixed liquid, it stirred at 4500 rpm using the blending stirrer, and it heated up to 65 degreeC. After stirring for about 2 hours to aggregate, the pH was adjusted to 7 and the temperature was raised to 96 ° C to fuse the toner particles. When the temperature was lowered to 60 ° C., 1N sodium hydroxide solution was added to adjust the pH to 9.
  • the crude powder was filtered through the mesh, the aggregates were washed three times with water, adjusted to pH 1.5 with 1N aqueous nitric acid solution, washed three times with pure water and filtered.
  • the filtrate was dried in a fluid bed dryer to prepare a black toner.
  • toner was prepared in the same manner as in Example 1 to prepare a black toner.
  • Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Polyester resin Polyester resin dispersion 1 86 Polyester resin dispersion 2 80 Polyester Resin Dispersion 3 78 Polyester resin dispersion 4 75 Polyester Resin Dispersion 5 80 Pigment Masterbatch Pigment Dispersion 1 7 8 Masterbatch Pigment Dispersion 2 10 Masterbatch Pigment Dispersion 3 10 Masterbatch Pigment Dispersion 4 7 Wax Wax dispersions 1 7 12 Wax dispersions 2 10 Wax dispersions 3 12 Wax dispersion 4 18
  • the average particle diameter of the toner particles was measured using Coulter Master Sizer III (backman coulter), the number of particles measured was 50000 counts, and the aperture used was 100 ⁇ m.
  • the measurement was carried out using FPIA-3000 (manufactured by Sysmex, Japan).
  • FPIA-3000 manufactured by Sysmex, Japan.
  • the measurement sample was prepared by adding an appropriate amount of a surfactant to 50-100 ml of distilled water, adding 10-20 mg of toner particles thereto, and then dispersing in an ultrasonic disperser for 1 minute.
  • the circularity is automatically obtained from FPIA-3000 by the following formula.
  • Circularity ⁇ 2 ⁇ (area ⁇ ⁇ ) 1/2 ⁇ / (perimeter)
  • the area means the area of the projected toner
  • the perimeter means the circumferential length of a circle having the same area as the area of the projected toner. This value can range from 0 to 1. The closer to 1, the more spherical.
  • Image evaluation was performed by developing a device that was converted from CLP-510 (Samsung), a digital full color printer. Image density was measured using spectroeye (GretagMacbeth).
  • Image density is 1.3 or higher
  • ng image density is 1.3 or less
  • the shelf life was stored for 24 hours in a 50 ml sample bottle weighing 5 g of toner and in a chamber at a temperature of 50 ° C. and a humidity of 80%. Take out the stored sample and leave it at room temperature to visually check the degree of aggregation, sift with a 100 ⁇ m sieve and measure the amount remaining on the top. If the amount is 10% or more, ng, 10% or less ok Evaluated as.
  • the toner particles produced by the manufacturing method of the present invention have a narrow particle size distribution and excellent image density and preservation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

L'invention concerne un procédé de production d'une encre en poudre (toner), ce procédé consistant à utiliser un polyester exempte de groupe d'acide sulfonique et à produire des particules d'encre en poudre à partir d'un milieu aqueux ne comportant pas de solvant organique, ceci afin d'obtenir des particules d'encre en poudre de granulométrie étroite et présentant d'excellentes propriétés de conservation.
PCT/KR2010/002092 2009-04-17 2010-04-06 Procédé de production d'une encre en poudre (toner) WO2010120059A2 (fr)

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KR1020090033740A KR20100115148A (ko) 2009-04-17 2009-04-17 토너의 제조방법
KR10-2009-0033740 2009-04-17

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WO2010120059A2 true WO2010120059A2 (fr) 2010-10-21
WO2010120059A3 WO2010120059A3 (fr) 2010-12-23

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN103384853A (zh) * 2010-12-24 2013-11-06 三星精密化学株式会社 调色剂的制备方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120072844A (ko) * 2010-12-24 2012-07-04 삼성정밀화학 주식회사 정전하상 현상용 중합 토너

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