WO2005081639A2 - 静電荷像現像用トナー - Google Patents
静電荷像現像用トナー Download PDFInfo
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- WO2005081639A2 WO2005081639A2 PCT/JP2005/002859 JP2005002859W WO2005081639A2 WO 2005081639 A2 WO2005081639 A2 WO 2005081639A2 JP 2005002859 W JP2005002859 W JP 2005002859W WO 2005081639 A2 WO2005081639 A2 WO 2005081639A2
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- toner
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- parts
- electrostatic image
- resin particles
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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
- G03G9/0819—Developers with toner particles characterised by the dimensions of the particles
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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
- G03G9/0821—Developers with toner particles characterised by physical parameters
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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
- G03G9/0827—Developers with toner particles characterised by their shape, e.g. degree of sphericity
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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
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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
- G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
- G03G9/08793—Crosslinked polymers
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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
- G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
- G03G9/08795—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775 characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants
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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
- G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
- G03G9/08797—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775 characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature
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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
- G03G9/093—Encapsulated toner particles
- G03G9/09307—Encapsulated toner particles specified by the shell material
- G03G9/09314—Macromolecular compounds
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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
- G03G9/093—Encapsulated toner particles
- G03G9/09307—Encapsulated toner particles specified by the shell material
- G03G9/09335—Non-macromolecular organic compounds
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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
- G03G9/093—Encapsulated toner particles
- G03G9/0935—Encapsulated toner particles specified by the core material
- G03G9/09357—Macromolecular compounds
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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
- G03G9/093—Encapsulated toner particles
- G03G9/0935—Encapsulated toner particles specified by the core material
- G03G9/09378—Non-macromolecular organic compounds
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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
- G03G9/093—Encapsulated toner particles
- G03G9/09392—Preparation thereof
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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
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
- G03G9/09716—Inorganic compounds treated with organic compounds
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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
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
- G03G9/09725—Silicon-oxides; Silicates
Definitions
- the present invention relates to a toner for developing an electrostatic image, and more particularly, to a toner for developing an electrostatic image which is excellent in hot offset resistance, can obtain good environmental durability, and can obtain a stable image density.
- image forming methods employing an electrophotographic method.
- the surface of the photoconductor is generally charged with a charging member by various means using a photoconductive substance, and the surface of the charged photoconductor is charged with an electrostatic latent image by a light irradiation device.
- the electrostatic latent image is developed with a toner to form a visible image
- the visible toner is transferred to a transfer material such as paper or an OHP sheet, and then the transferred toner is heated. It is fixed on the transfer material by pressure or pressure to obtain printed matter.
- the basic performances of toner include image reproducibility (reproducing fine lines and fine dots accurately during development), low-temperature fixability, and hot offset resistance (when toner is not fixed to the transfer material, It is required that the heat-pressure roller (fixing roller) for fixing does not remain on the fixing roller).
- thermoplastic resin containing a colorant, a release agent, a charge controlling agent, and the like is melt-mixed and uniformly dispersed, and then finely pulverized by a fine pulverizer.
- a pulverized toner produced by classifying the obtained finely pulverized product with a classifier has been mainly used.
- the molten toner adheres to the surface of the high-temperature pressure roll (hot-press roller for fixing). (Hot offset) is there. Further, since the shape of the ground toner is irregular, the charge amount tends to be non-uniform, and there is a problem that image reproducibility is reduced.
- toner polymerized toner
- various polymerization methods including a suspension polymerization method
- a polymerizable monomer, a colorant and a polymerization initiator, and further, if necessary, a crosslinking agent, a charge controlling agent, and other additives are uniformly dissolved or dispersed to form a monomer composition.
- a polymerization reaction is performed to obtain toner particles having a desired particle size.
- particles having a relatively narrow particle size distribution can be obtained, and since a release agent, a colorant and a charge control agent can be included in the particles, a toner having a uniform charge amount can be obtained, and a low temperature can be obtained.
- a hot-offset resistance is also improved because a release agent that melts at the time can be included.
- Patent Document 1 discloses that when a cross section of toner particles is observed with a transmission electron microscope, a wax component is dispersed in the binder resin in a granular form, and There is disclosed a toner in which a resin component is dispersed in a granular form in the wax component, and the content of the residual monomer contained in the toner particles is in a specific range. It is disclosed that this toner is excellent in low-temperature fixability, storage stability and durability.
- Patent Document 1 has a problem in stability of image density and environmental durability. Further, it is desired to further improve the low-temperature fixability.
- Patent Document 2 discloses a toner containing, as a release agent, a natural gas-based Fischer-Tropsch wax having an endothermic peak temperature measured by a differential scanning calorimeter and a volume average particle size in a specific range. Have been.
- the toner disclosed in Patent Document 2 has a high hot offset temperature despite having a low fixing temperature, and is further excellent in fluidity and storage stability.
- the toner disclosed in Patent Document 2 has a problem in stability of image density and environmental durability. Further, it is desired to further improve the low-temperature fixability.
- Patent Document 3 discloses a method for producing a toner in which a binder resin contains a charge control resin composition comprising a charge control resin, a colorant, and inorganic fine particles.
- the patent The toner obtained by the production method disclosed in Reference 3 has a clear color tone, stable chargeability, and excellent transferability. However, it is desired that the toner disclosed in Patent Document 3 has improved environmental durability.
- Patent Document 1 JP-A-11-249334
- Patent Document 2 JP 2002-229251 A
- Patent Document 3 JP 2003-131428 A
- an object of the present invention is to provide a toner for developing an electrostatic charge image having good hot offset resistance, excellent environmental durability and stable image density. Means for solving the problem
- the present inventors have conducted intensive studies to achieve the above object, and as a result, have found that a toner for developing an electrostatic image containing at least colored resin particles comprising a binder resin, a colorant, a charge control agent, and a release agent.
- a toner for developing an electrostatic image containing at least colored resin particles comprising a binder resin, a colorant, a charge control agent, and a release agent.
- the present invention has been made based on the above findings, and is an electrostatic image developing toner containing colored resin particles containing a binder resin, a colorant, a charge control agent, and a release agent.
- the volume average particle diameter (Dv) of the colored resin particles is 419 / im
- the average circularity of the colored resin particles is 0.93 to 0.995
- Shear viscosity at 130 ° C and shear rate lOZs (? 71) is 3,500 8, OOOPa's.
- the toner for developing an electrostatic image of the present invention contains colored resin particles comprising at least a binder resin, a colorant, a charge control agent and a release agent.
- binder resin examples include resins widely used in toners such as polystyrene, styrene-butyl acrylate copolymer, polyester resin, and epoxy resin.
- any black colorant and dye can be used as a colorant in addition to carbon black, titanium black, magnetic powder, oil black, and titanium white.
- the black carbon black those having a primary particle size of 20 to 40 nm are preferably used. When the particle size is in this range, carbon black can be uniformly dispersed in the toner for developing an electrostatic image, and fogging can be reduced.
- yellow colorants include compounds such as azo colorants and condensed polycyclic colorants. Specifically, CI Pigment Yellow 3, 12, 13, 14, 15, 17, 62, 65, 73, 74, 83, 90, 93, 97, 120, 138, 155, 180, 181, 185, 186, etc. Empower.
- magenta colorants examples include compounds such as azo colorants and condensed polycyclic colorants. Specifically, CI Pigment Red 31, 48, 57, 58, 60, 63, 64, 68, 81, 83, 87, 88, 89, 90, 112, 114, 122, 123, 144, 146, 149, 150, 163, 170, 184, 185, 187, 202, 206, 207, 209, 251; CI pic;
- cyan coloring agent for example, a copper phthalocyanine compound and its derivative, an anthraquinone compound, and the like can be used. Specifically, CI Pigment Blue 2, 3, 6, 15, 15 : 1, 15: 2, 15: 3, 15: 4, 16, 17, and 60 s.
- One, two or more yellow colorants, magenta colorants and cyan colorants can be used in combination.
- the amount of the coloring agent is preferably 110 parts by weight based on 100 parts by weight of the binder resin.
- a charge control agent conventionally used in toners can be used without any limitation, but it is preferable to include a charge control resin.
- the reason is that the charge control resin has high compatibility with the binder resin, is colorless, and can provide a toner having stable chargeability even in high-speed color continuous printing.
- the charge control resin is a quaternary ammonium manufactured according to the description of 1134840863 (8), JP-A No. 3_175456, JP-A-3-243954, JP-A-11-115192 as a positive charge control resin. (Salt) group-containing copolymers, and sulfonic acid (salt) group-containing copolymers produced as described in US Pat. No. 4,950,575 (A) and JP-A-3-5858 as negative charge control resins. You can.
- the ratio of the monomer unit having a functional group such as a quaternary ammonium (salt) group or a sulfonic acid (salt) group contained in these copolymers is preferably 1 to 12 with respect to the weight of the charge control resin. %, More preferably 1.5-8% by weight. When the content is in this range, it is easy to control the charge amount of the toner for developing an electrostatic image, and the occurrence of fog can be reduced.
- the charge control resin those having a weight average molecular weight of 2,000 to 50,000 are preferable, and those having a weight average molecular weight of 4, 000 to 40,000 are more preferable. S, and those having a weight average molecular weight of 6,000 to 35,000 are more preferable. S most preferred level.
- the weight average molecular weight of the charge control resin is in the above range, it is possible to suppress the occurrence of hot offset and a decrease in fixability.
- the glass transition temperature of the charge control resin is preferably 40 to 80 ° C, more preferably 45 to 75 ° C, and most preferably 45 to 70 ° C. When the glass transition temperature is in this range, the storability and fixability of the toner can be improved in a well-balanced manner.
- the amount of the above-mentioned charge controlling agent is usually 0.1 to 10 parts by weight, preferably 0.5 to 6 parts by weight, based on 100 parts by weight of the binder resin.
- low molecular weight polyethylene low molecular weight polypropylene
- low molecular weight Polyolefin waxes such as polybutylene
- plant-based natural waxes such as candelilla, carnauba, rice, Kiguchi, jojoba
- petroleum-based waxes such as paraffin, microcrystalline, petrolatum, and modified waxes
- synthetic waxes such as Fischer-Tropsch wax
- Polyfunctional ester compounds such as erythritol tetrastearate, pentaerythritol tetrapalmitate, dipentaerythritol hexamyristate, and pentaerythritol tetramyristate;
- a polyfunctional ester compound is preferable.
- the endothermic peak temperature at the time of temperature rise is preferably 30 to 150 ° C, more preferably 40 to 100 ° C, and most preferably 50 to 100 ° C.
- a polyfunctional ester compound having a temperature in the range of 80 ° C. is preferable because a toner having an excellent balance between fixing and releasability during fixing can be obtained.
- the polyfunctional ester compound has a molecular weight of 1,000 or more, dissolves at least 5 parts by weight per 100 parts by weight of styrene at 25 ° C, and has an acid value of 1 mgKOH / g or less and a hydroxyl group of 5 mgK ⁇ H / g or less.
- Those having a valency are preferable because they have high effects of lowering the fixing temperature and suppressing hot offset.
- the above acid value and hydroxyl value are based on JOCS. 2.3-1-96 and J OCS. 2. 3.6.2-96, respectively, which are the standard oil and fat analysis methods established by the Japan Oil Chemical Society (CJOCS). Means the value to be measured.
- the endothermic peak temperature means a value measured by ASTM D3418-82.
- the amount of the release agent is usually 3 to 20 parts by weight, preferably 5 to 15 parts by weight based on 100 parts by weight of the binder resin.
- core-shell type scallops Colored resin particles obtained by combining two different polymers inside (core layer) and outside (shell layer) of the particles, so-called core-shell type scallops are also referred to as “capsule type”. ) are preferred.
- core-shell type particles by lowering the softening point material inside (core layer) with a material having a higher softening point, it is possible to balance between lowering the fixing temperature and preventing aggregation during storage. Because you can.
- the core layer of the core-shell type particles contains the binder resin, the colorant, the charge control agent, and the release agent, and the shell layer is composed only of the binder resin.
- the weight ratio of the core layer to the shell layer of the core-shell type particles is not particularly limited, but is usually from 80/20 to 99.9 / 0.1.
- the ratio of the shell layer By setting the ratio of the shell layer to the above ratio, it is possible to obtain both the storability of the toner and the fixability at a low temperature.
- the average thickness of the shell layer of the core-shell type particles is usually 0.001 0.1 ⁇ m, preferably 0.003 to 0.08 xm, and more preferably f to 0.005 to 0.05 zm.
- the average thickness of the shenole layer is preferably in the range of S because the fixing property and the storability of the toner are improved. Note that the core-shell type colored resin particles need not cover the entire surface of the core layer with the shell layer, as long as a part of the surface of the core layer is covered with the shell layer.
- the particle size of the core layer and the thickness of the shell layer of the core-shell type particles can be observed by an electron microscope, the particle size and the thickness of the shell layer selected at random can be obtained directly from the observed photograph.
- it is difficult to observe the core and the shell with an electron microscope it is possible to calculate from the particle size of the core layer and the amount of monomers forming the shell.
- the colored resin particles constituting the toner for developing an electrostatic image of the present invention have a volume average particle diameter (Dv) of about 9 ⁇ , and preferably have a volume average particle diameter of 417 ⁇ . If Dv is less than 4 / im, the fluidity of the toner for developing an electrostatic image is reduced, and fog is generated and dot reproducibility is reduced. When Dv exceeds 9 ⁇ , reproducibility of fine lines is reduced.
- the colored resin particles constituting the toner for developing an electrostatic image of the present invention have a ratio (Dv / Dp) force between the volume average particle diameter (Dv) and the number average particle diameter (Dp), preferably 1. 0-1.3, and more preferably 1.0-1.2.
- Dv / Dp is in this range, occurrence of toner fog can be suppressed.
- the colored resin particles constituting the toner for developing an electrostatic image of the present invention have an average circularity of preferably 0.93 to 0.995, as measured by a flow type particle image analyzer. Preferably it is 0.95-0.995.
- the average circularity is within this range, under L / L environment (temperature: 10 ° C, humidity: 20%), under N / N environment (temperature: 23 ° C, humidity: 50%), under HZH environment (Temperature: 35 ° C, Humidity: 80%) can prevent the reproducibility of fine lines from deteriorating. Static charge using phase inversion emulsification method, dissolution suspension method, polymerization method (suspension polymerization method or emulsion polymerization method), etc. By producing the toner for image development, the average circularity can be relatively easily adjusted to the above range.
- the circularity is defined as the ratio of the circumference of a circle having the same projection area as the particle image to the circumference of the projection image of the particle.
- the circularity in the present invention is used as a simple method for quantitatively expressing the shape of particles, and is an index indicating the degree of unevenness of the colored resin particles. This circularity shows 1 when the colored resin particles are perfectly spherical, and becomes smaller as the surface shape of the colored resin particles becomes more uneven.
- the average circularity (Ca) is a value determined by the following equation.
- n is the number of particles for which the circularity Ci has been obtained.
- Ci is the circularity of each particle calculated by the following equation based on the circumference measured for each particle in the particle group having a circle equivalent diameter of 0.6 to 400 / im.
- Circularity (Ci) Perimeter of a laser circle equal to the projected area of a particle / Perimeter of a projected particle image
- fi is the frequency of a particle having a circularity Ci.
- the number average particle diameter, volume average particle diameter, circularity, and average circularity of the colored resin particles can be determined using a flow particle image analyzer “FPIA-2100” or “FPIA-2000” manufactured by Sysmettas Corporation. it can.
- the toner for developing an electrostatic image of the present invention has a shear rice occupation (1) force of s 3,500-8, OOOPa's at a temperature of 130 ° C and a shear rate of 10 / s, and preferably f 4,000 7, OOOPa's. If ⁇ 1 is less than 800 Pa's, hot offset may occur.
- the toner for developing an electrostatic image of the present invention has a shear viscosity (? 72) force of 00 1,300 Pa's at a temperature of 130 ° C. and a shear rate of 500 Zs, preferably 400-1, 1, OOOPa's.
- a shear viscosity (? 72) force of 00 1,300 Pa's at a temperature of 130 ° C. and a shear rate of 500 Zs, preferably 400-1, 1, OOOPa's.
- the value of (2) is less than 300 Pa's, hot offset occurs and the preservability deteriorates immediately, and if it exceeds 1,300 Pa's, the low-temperature fixability decreases.
- the ratio of ⁇ 1 to 772 (771/772) is preferably 310, more preferably 5-10.
- the above shear viscosity can be measured using a capillary rheometer.
- twin capillary rheometer it is measured based on K7199.
- the use of a twin capillary rheometer is preferred because the shear viscosity can be measured more easily.
- a typical capillary rheometer uses a long capillary leader. In this case, however, the pressure must be corrected due to the pressure loss at the time of measurement, and in order to obtain the correct rheological information of the substance, a short capillary reed is used under the same conditions. Need to measure.
- the twin-cavity rheometer can perform this measurement at once. As such a twin-capillary rheometer, "RH7" made of Lausanne clay can be cited.
- the content A of the component having a volatilization temperature of 130 ° C or less is 100 ppm or less, preferably 80 ppm or less, more preferably 50 ppm or less. I like it.
- the content B of the component having a volatilization temperature higher than 130 ° C. and 180 ° C. or less is 100 ppm or less, preferably 80 ppm or less, and more preferably 50 ppm or less. Is more preferable.
- a of the component having a volatilization temperature of 130 ° C or less exceeds 100 ppm, the image density decreases, the environmental durability decreases, and toner fog occurs.
- a + B is at most 150 ppm, preferably at most 100 ppm.
- AZB is 1.0 or less, preferably 0.8 or less.
- the component having a volatilization temperature of 130 ° C or lower and the component having a volatilization temperature higher than 130 ° C and 180 ° C or lower as defined in the present invention means that the electrostatic image developing toner is heated at 130 ° C for 30 minutes. Then, it means volatile components other than water that are generated when heated at 180 ° C for 30 minutes, and all substances that satisfy this condition are applicable.
- Examples of such substances include macromonomer unreacted residue, monomer (monovinyl monomer, crosslinkable monomer, etc.) component, residual reaction solvent, impurities in the colorant, impurities in the charge control resin, and external additives. And decomposition products of polymerization initiators and the like.
- residual monomers are specified for volatile components in the toner.
- non-volatile components or substances that decompose and volatilize at high temperatures may be contained. If the hardly volatile component remains, it adversely affects not only the fixing property but also the printing characteristics.
- the volatilization temperature of the monomer component is 130 ° C or lower, but the roll temperature at the time of fixing the toner is usually 180 to 200 ° C. It is necessary that the amount of initiator residue ⁇ molecular weight modifier residue is small.
- the quantitative determination of volatile components in the present invention is, for example, the quantitative determination of volatile components generated when the electrostatic image developing toner is heated at 130 ° C. for 30 minutes and then at 180 ° C. for 30 minutes. Quantitatively by di-trap (P & T) / gas chromatography. Generally, it is preferable because the force for measuring the amount of volatile components by head space / gas chromatography S and the force of the P & T method are highly accurate in quantification. However, the present invention is not limited to this method, and any other method may be used as long as it can quantify volatile components. Qualitative analysis of volatile components can be performed by mass spectrometry / gas chromatography (MS / GC).
- the toner for developing an electrostatic image of the present invention preferably has a tetrahydrofuran-insoluble content of 50 to 95% by weight, more preferably 50 to 90% by weight. It is preferred that the amount of the tetrahydrofuran-insoluble component be in this range, because the occurrence of hot offset can be suppressed and the storage stability of the toner can be improved.
- the tetrahydrofuran insoluble content can be measured by the method described later.
- the electrostatic image developing toner of the present invention can be used as it is for electrophotographic development, but usually, the chargeability, fluidity, storage stability, etc. of the electrostatic image developing toner are adjusted.
- fine particles having a smaller particle size than the colored resin particles hereinafter, referred to as an external additive
- an external additive fine particles having a smaller particle size than the colored resin particles
- Examples of the external additive include inorganic particles and organic resin particles that are usually used for the purpose of improving the fluidity and chargeability of the toner. These particles added as external additives have a smaller average particle size than the colored resin particles.
- examples of the inorganic particles include silica, vinyl oxide, titanium oxide, zinc oxide, and tin oxide.
- examples of the organic resin particles include methacrylate polymer particles, acrylate polymer particles, and styrene-methacrylate. Acid-ester copolymer particles, styrene-acrylic acid ester copolymer particles, core-shell particles formed of a styrene polymer having a core of Sirka S methacrylate polymer, and the like.
- silica particles and titanium oxide particles are preferred, and hydrophobically-treated silica particles are particularly preferred, with particles having a hydrophobic surface being more preferred.
- the amount of the external additive is not particularly limited, but is usually 0.1 to 16 parts by weight based on 100 parts by weight of the colored resin particles.
- the method for producing the colored resin particles constituting the toner for developing an electrostatic image of the present invention is not particularly limited as long as it is capable of providing particles having the above-mentioned characteristics. It is particularly preferred to be produced by a suspension polymerization method.
- the colored resin particles constituting the toner for developing an electrostatic image of the present invention include, for example, a polymerizable monomer which is a raw material of a binder resin, a coloring agent, a charge control agent, a release agent, a chain transfer agent, and the like. It can be produced by dissolving or dispersing other additives, adding a polymerization initiator in an aqueous dispersion medium containing a dispersion stabilizer, performing a polymerization reaction, and filtering, washing, dehydrating and drying.
- a polymerizable monomer which is a raw material of a binder resin, a coloring agent, a charge control agent, a release agent, a chain transfer agent, and the like. It can be produced by dissolving or dispersing other additives, adding a polymerization initiator in an aqueous dispersion medium containing a dispersion stabilizer, performing a polymerization reaction, and filtering, washing, dehydrating and drying.
- the type of polymerizable monomer and its ratio, the type and amount of crosslinkable monomer, the amount of chain transfer agent, the type and amount of release agent, and the type and amount of initiator By controlling, etc., the characteristics such as the shear viscosity 1 and 2, and the content A and B of the volatile components can be set within the specified ranges.
- the colored resin particles of the present invention are obtained by emulsion-polymerizing a polymerizable monomer, a chain transfer agent, and other additives, which are raw materials of a binder resin, in an aqueous medium containing an emulsifier. Thereafter, a colorant, a charge control agent, a release agent, and the like are emulsified, and the emulsified components are aggregated by heat to obtain a dispersion of the colored resin particles, and then filtered, washed, dehydrated, and dried. Can be manufactured.
- the polymerization reaction by controlling the type and amount of the polymerizable monomer and the crosslinkable monomer, the amount of the chain transfer agent, the type and the amount of the release agent, and the type and the amount of the initiator, The ability to keep the properties such as shear viscosity 77 1, 772, volatile component content A, B, etc. within specified ranges.
- Examples of the polymerizable monomer include a monovinyl monomer, a crosslinkable monomer, and a macromonomer. This polymerizable monomer is polymerized to become a binder resin component.
- Examples of the monobutyl monomer include aromatic vinyl monomers such as styrene, butyl toluene, and methyl styrene; (meth) acrylic acid; methyl (meth) acrylate, ethyl (meth) acrylate, and propyl (meth) acrylate.
- (Meth) acrylic monomers such as butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, and isobonyl (meth) acrylate; ethylene, propylene, butylene And the like.
- the monobutyl monomer may be used alone or in combination of a plurality of monomers.
- an aromatic vinyl monomer alone or a combination of an aromatic vinyl monomer and a (meth) acrylic monomer is preferably used.
- the crosslinkable monomer is a monomer having two or more bull groups. Specific examples thereof include dibutylbenzene, divinylnaphthalene, ethylene glycol dimethacrylate, pentaerythritol triallyl ether, and trimethylolpropane triatalylate. These crosslinkable monomers can be used alone or in combination of two or more.
- the amount of the crosslinkable monomer is usually 10 parts by weight or less, preferably 0.1 to 12 parts by weight, per 100 parts by weight of the monovinyl monomer.
- the macromonomer has a polymerizable carbon-carbon unsaturated double bond at the terminal of the molecular chain, and is an oligomer or polymer having a number average molecular weight of usually 1,000, 30,000.
- the macromonomer is a glass transition of a polymer obtained by polymerizing the monobutyl monomer. Those that give a polymer with a higher glass transition temperature than the temperature are preferred.
- the amount of the macromonomer is usually 0.01 to 10 parts by weight, preferably 0.03 to 5 parts by weight, more preferably 0.05 to 1 part by weight based on 100 parts by weight of the monovinyl monomer.
- polymerization initiator examples include persulfates such as potassium persulfate and ammonium persulfate; 4,4,1-azobis (4-cyanovaleric acid), 2,2'-azobis (2_methyl_N_ (2— (Hydroxysethinole) propionamide, 2,2'-azobis (2-amidinopropane) dihydrochloride, 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobisisobutyronitrile, etc.
- persulfates such as potassium persulfate and ammonium persulfate
- 2,2'-azobis (2_methyl_N_ (2— (Hydroxysethinole) propionamide 2,2'-azobis (2-amidinopropane) dihydrochloride
- 2,2'-azobis (2,4-dimethylvaleronitrile) 2,2'-azobisisobutyronitrile
- Redox open HajimeHitoshi U of a combination of a polymerization initiator and a reducing agent may be used.
- the amount of the polymerization initiator used for the polymerization of the polymerizable monomer is preferably 0.1 to 20 parts by weight, more preferably 0.3 to 100 parts by weight of the polymerizable monomer. -15 parts by weight, most preferably 0.5-10 parts by weight.
- the polymerization initiator may be added to the polymerizable monomer composition in advance, but may be added to the aqueous dispersion medium after the formation of the droplets in some cases.
- a dispersion stabilizer in the aqueous dispersion medium.
- the dispersion stabilizer include barium sulfate, calcium sulfate, calcium carbonate, and carbonic acid.
- Inorganic salts such as magnesium and calcium phosphate; inorganic oxides such as aluminum oxide and titanium oxide; inorganic compounds such as inorganic hydroxides such as aluminum hydroxide, magnesium hydroxide and ferric hydroxide; polybutyl alcohol, methyl cellulose, gelatin And the like; water-soluble polymers such as anionic surfactants, nonionic surfactants, and amphoteric surfactants.
- the above dispersion stabilizers can be used alone or in combination of two or more.
- the dispersion stabilizer containing a colloid of an inorganic compound, particularly a poorly water-soluble inorganic hydroxide has a particle size of the colored resin particles.
- the toner which can make the cloth narrow has a small amount of the dispersion stabilizer remaining in the colored resin particles after washing, and is obtained is preferable since the image can be clearly reproduced.
- a dispersion stabilizer containing a colloid of a poorly water-soluble inorganic hydroxide for example, an aqueous solution of a water-soluble polyvalent metal compound (A) and an aqueous solution containing a colloid-forming anion (B) )
- a colloidal aqueous solution of a poorly water-soluble inorganic hydroxide at a liquid temperature (t) of preferably 25 to 75 ° C, more preferably 25 to 40 ° C, thereby inactivating the colloid formation. It is preferable to carry out in a gas atmosphere.
- the temperature force of (A) and (B) is preferably St ⁇ 10 ° C.
- colloidal aqueous solution of a poorly water-soluble inorganic hydroxide and the polymerizable monomer composition are mixed with a stirrer to disperse the polymerizable monomer composition.
- a solution of the agent is used.
- the formation of the droplets is performed in an inert gas atmosphere, and the temperature rise before and after the formation of the droplets is preferably 0 to 20 ° C.
- the amount of the dispersion stabilizer is preferably 0.1 to 20 parts by weight based on 100 parts by weight of the polymerizable monomer. When the amount of the dispersion stabilizer is in this range, sufficient polymerization stability can be obtained, and the formation of a polymerized aggregate is preferably suppressed.
- a molecular weight modifier is preferably used.
- the molecular weight regulator include mercaptans such as t-dodecyl mercaptan, n-dodecyl mercaptan, n-octyl mercaptan, and 2,2,4,6,6-pentamethylheptane-1-thiol. Of the above, 2,2,4,6,6_pentamethylheptane-1-thiol is preferred.
- the above-mentioned molecular weight modifier can be added before or during the polymerization.
- the amount of the molecular weight modifier is preferably 0.01 to 10 parts by weight, more preferably 0.15 part by weight, based on 100 parts by weight of the polymerizable monomer.
- the above-described method for producing the core-shell type colored resin particles is not particularly limited, and can be produced by a conventionally known method.
- methods such as a spray drying method, an interfacial reaction method, an in situ polymerization method, and a phase separation method may be mentioned.
- the grinding method A core-shell type colored resin particle can be obtained by using a colored resin particle obtained by a polymerization method, an association method or a phase inversion emulsification method as a core layer and coating it with a shell layer.
- an in situ polymerization method and a phase separation method are preferable from the viewpoint of production efficiency.
- a polymerizable monomer for forming the shell layer (polymerizable monomer for shell) and a polymerization initiator are added to an aqueous dispersion medium in which the particles of the core layer are dispersed, and the core shell is formed by polymerization. Mold coloring resin particles can be obtained.
- a method of continuously polymerizing by adding a polymerizable monomer for shell to the reaction system of the polymerization reaction performed to obtain the core particles, or using another reaction system A method of charging the obtained particles to be the core layer, adding a polymerizable monomer for shell to the obtained particles, and performing polymerization may be used.
- the polymerizable monomer for shell may be added to the reaction system all at once, or may be added continuously or intermittently using a pump such as a plunger pump.
- polymerizable monomer for the shell monomers that form a polymer having a glass transition temperature of more than 80 ° C, such as styrene, acrylonitrile, and methyl methacrylate, may be used alone or in combination. These can be used in combination.
- the addition of a water-soluble polymerization initiator as a polymerization initiator for polymerizing the polymerizable monomer for shell can improve the color resin particles having a core-shell structure. It is preferable because it can be easily obtained.
- the water-soluble polymerization initiator is added during the addition of the shell polymerizable monomer, the water-soluble polymerization initiator moves to the vicinity of the outer surface of the core particle to which the shell polymerizable monomer has migrated, It is considered that a polymer (shell) is likely to be formed on the core particle surface.
- water-soluble polymerization initiator examples include persulfates such as potassium persulfate and ammonium persulfate; 2,2, -azobis (2_methyl_N_ (2-hydroxyethyl) propionamide), 2,2, And azo-based initiators such as azo bis-mono (2-methyl-N- (1,1-bis (hydroxymethinole) 2-hydroxyethyl) propionamide).
- the amount of the water-soluble polymerization initiator is usually 0.1 to 30 parts by weight, preferably 111 to 20 parts by weight, based on 100 parts by weight of the polymerizable monomer for shell.
- the temperature during the polymerization is preferably 50 ° C or higher, more preferably 60 to 95 ° C. Further, the reaction time is preferably 120 hours, more preferably 2-10 hours. After completion of the polymerization, it is preferable that the operations of filtration, washing, dehydration and drying are repeated several times as necessary according to a conventional method.
- an aqueous dispersion of the colored resin particles obtained by polymerization is added with an acid or an alkali to convert the dispersion stabilizer into water. It is preferable to dissolve and remove.
- an acid to be added inorganic acids such as sulfuric acid, hydrochloric acid, and nitric acid, and organic acids such as formic acid and acetic acid can be used. Particularly, sulfuric acid is used because of its high removal efficiency and small burden on production facilities. Is preferred.
- the method of filtering and dehydrating the aqueous dispersion of the colored resin particles is not particularly limited.
- a centrifugal filtration method, a vacuum filtration method, a pressure filtration method, and the like can be given. Of these, centrifugal filtration is preferred.
- the electrostatic image developing toner of the present invention is preferably obtained by mixing the colored resin particles, the external additive, and if necessary, other fine particles with a high-speed stirrer such as a Henschel mixer. .
- the electrostatic charge image developing toner was evaluated by the following method.
- toner for developing electrostatic images, add 100 ⁇ l of 0.1% aqueous solution of sodium dodecylsulfonate (anion-based surfactant) as a dispersion medium, allow it to mix, add 1 Oml of ion-exchanged water, and stir. Then, dispersion treatment was performed for 30 minutes at 60 W using an ultrasonic disperser. Adjust the toner concentration at the time of measurement so that it is 3,000—10,000 particles // il. The measurement was performed using a flow particle image analyzer “FPIA-2100” manufactured by Sysmettas Corporation for 1,000 to 10,000 toner particles. From the measured values, the volume average particle size (Dv), the particle size distribution, that is, the ratio (Dv / Dp) between the volume average particle size and the number average particle size (Dp), and the average circularity were determined.
- Dv volume average particle size
- Dp the particle size distribution, that is, the ratio (Dv / Dp) between the volume average particle size and the number average particle size (D
- the shear viscosity was measured based on JIS K7199. Approximately 30 g of the weighed toner for developing an electrostatic image is placed in a barrel, the temperature is increased, and the toner for developing an electrostatic image is melted while the air in the sample is degassed. The retained sample was measured under the following conditions using a cavitary rheometer (manufactured by Lausand Co., model name "RH7"). The measured data is corrected for pressure loss (bar gray correction) and rabino pitch correction caused by the die using the analysis software (Dr. Rheology Ver.7, manufactured by ITI S. Japan). Re, a graph of shear viscosity was obtained. In this graph, the shear viscosities r? 1 and r? 2 at the shear rate lOZs and 500 / s were determined.
- Capillary die material tungsten carbide
- Capillary die diameter lmm, length 16mm, inflow angle 180 °
- Approximately 1 g of the toner for developing an electrostatic image is weighed and placed in a Soxhlet extractor containing a cylindrical filter paper (manufactured by Toyo Roshi Kaisha, No. 86R, size 29 ⁇ 100 mm), and about 100 ml of tetrahydrofuran (THF) is used as a solvent. Refluxed for hours. Reflux was performed once every 515 minutes with a source from which the solvent fell. After the reflux, the filter paper was air-dried overnight in a fume hood, dried under reduced pressure at a temperature of 50 ° C for 1 hour, weighed, and the following formula was calculated.
- a cylindrical filter paper manufactured by Toyo Roshi Kaisha, No. 86R, size 29 ⁇ 100 mm
- THF tetrahydrofuran
- THF-insoluble content (% by weight) (S / T) x 100
- T is the amount (g) of the toner for developing electrostatic images put in the Soxhlet extractor
- S is the amount (g) of insoluble components remaining on the filter paper after reflux.
- Purging & trapping As shown below, by Z gas chromatography (P & TZGC) method, the content A of the component whose volatilization temperature is 130 ° C or less, and the content of the component whose volatilization temperature is higher than 130 ° C and 180 ° C or less The quantity B was determined.
- 0.1 lg of the toner for developing an electrostatic charge image is placed in a purge container, and while the helium gas is flowing at 50 ml / min as a carrier gas, the purge container is heated from room temperature at a rate of 10 ° C / min. The temperature was maintained for 30 minutes, and the generated volatile components were collected in a trap tube cooled to -130 ° C. After the collection, the temperature of the purge vessel was returned to room temperature. Next, the trap tube collecting the volatile components was heated from -130 ° C to 280 ° C at a rate of 50 ° C / min, and the volatile components were quantified using gas chromatography under the following conditions.
- the content A of the component having a volatilization temperature of 130 ° C or lower was determined.
- the purge container returned to room temperature is kept at 180 ° C for 30 minutes as it is to quantify the collected volatile components, and the volatile temperature is higher than 130 ° C and 180 ° C or less.
- the content B of the component was determined.
- the instrument was Agilent Gas Chromatograph 6890 (FID method), Shimadzu C-1 R7A Chromatopack, purge & trap sampler was Agilent TDS, column was J & W D
- Carrier gas helium gas, flow rate: lmlZ min
- the fixing test was performed using a printer modified so that the temperature of the fixing roll of a commercially available non-magnetic one-component developing system printer (24 sheet machine) can be changed.
- the temperature of the fixing roll of the modified printer was stabilized at 150 ° C, printing was performed with the modified printer. It was calculated from the ratio of the image density before and after the tape peeling operation in the black solid area on the test paper. That is, assuming that the image density before tape removal is before ID and the image density after tape removal is after ID, the fixing rate can be calculated from the following equation.
- Fixing rate (%) (after ID and before ZID) X 100
- the tape peeling operation means that an adhesive tape (Scotch Mending Tape 810 — 3 _ 18 , manufactured by Sumitomo 3LEM) is applied to the measurement area of the test paper, adhered at a constant pressure, and then applied at a constant speed along the paper. Means a series of operations for peeling off the adhesive tape. The image density was measured using a Macbeth reflection image densitometer.
- printing is performed by changing the temperature of the fixing roll in 5 ° C increments, and the minimum temperature at which toner remains on the fixing roll and causes dirt is defined as the hot offset generation temperature.
- the hot offset generation temperature High resistance to hot offset and can be used for higher-speed printing, so it is excellent as a toner.
- the evaluation of environmental durability was based on the value of (A-B) obtained from the value measured with a whiteness meter when the solid printing was performed with a print density of 1.4 or more when black solid printing was performed.
- the number of continuous prints that can maintain the image quality of less than 1% was investigated up to 10,000 sheets. In the table, “10,000 sheets or more” means that 10,000 sheets satisfied the above criteria.
- an aqueous sodium hydroxide solution in which 6.8 parts of sodium hydroxide was dissolved in 50 parts of ion-exchanged water in an aqueous solution of magnesium chloride in which 10.8 parts of magnesium chloride was dissolved in 250 parts of ion-exchanged water.
- a magnesium hydroxide colloidal dispersion All of the dispersions were prepared at 23 ° C. in a nitrogen gas atmosphere.
- 2 parts of methyl methacrylate and 65 parts of water were mixed to obtain an aqueous dispersion of a polymerizable monomer for shell.
- the magnesium hydroxide colloidal dispersion in which the droplets of the polymerizable monomer composition are dispersed is put into a reactor equipped with stirring blades, and the temperature is raised to 90 ° C to carry out the polymerization reaction, thereby effecting polymerization conversion. Rate is After reaching almost 100%, a water-soluble initiator (manufactured by Wako Pure Chemical Industries, Ltd., trade name "VA- 086 ”) (0.3 parts of 2,2, -azobis (2-methyl-N (2-hydroxyethyl) -propionamide) was added to the reactor. The temperature was controlled to be constant at 90 ° C. After the polymerization was continued for 4 hours, the mixture was cooled after completion of the polymerization to obtain an aqueous dispersion of colored resin particles.
- a water-soluble initiator manufactured by Wako Pure Chemical Industries, Ltd., trade name "VA- 086 ”
- VA- 086 0.3 parts of 2,2, -azobis (2-methyl-N (2-hydroxyethyl)
- the resulting aqueous dispersion of the colored resin particles is acid-washed (25 ° C, 10 minutes) with sulfuric acid to adjust the pH of the system to 5 or less while stirring at room temperature. After separation, 500 parts of ion-exchanged water was added again to reslurry, and water washing was performed. After that, dehydration and water washing were repeated several times at room temperature, and the solid content was separated by filtration. The solid content was dried at 40 ° C. for two days and night to obtain dried colored resin particles.
- the obtained colored resin particles had a volume average particle size (Dv) of 6.4 ⁇ m, a particle size distribution (Dv / Dp) of 1.21, and an average circularity of 0.980.
- Example 1 The same operation as in Example 1 was carried out, except that 10 parts of Kisamyristate (acid value: 0.5 mgK ⁇ H / g, hydroxyl value: 0.9 mgKOHZg) was used to obtain a polymerizable monomer composition. An electrostatic image developing toner was obtained. The properties, images, and the like of the obtained toner for developing an electrostatic image were evaluated in the same manner as in Example 1. The results are shown in Table 1.
- Comparative Example 1 Disperse 24 parts of toluene and 6 parts of methyl ethyl ketone in 100 parts of a negative charge control resin (7% sulfonic acid functional group, product of Fujikura Kasei Co., Ltd., trade name: FCA626N). Kneaded. When the charge control resin is wrapped around the roll, 100 parts of carbon black (trade name “# 25B”, manufactured by Mitsubishi Chemical Corporation) and hydrophobically treated silica fine particles with a primary particle size of 40 nm (trade name: RX_50, manufactured by Nippon Aerogenore Co., Ltd.) )) 40 parts were gradually added and kneaded for 40 minutes to produce a negative charge control resin composition.
- the polymerizable monomer composition is charged into the magnesium hydroxide colloidal dispersion obtained as described above, and the mixture is stirred until the droplets are stabilized, and the polymerization initiator: t-butyl peroxy 2 _ After adding 6 parts of ethyl hexanoate (“Perbutyl 0” manufactured by NOF CORPORATION), the mixture is subjected to high-shear stirring at a rotational speed of 15, OOO rpm for 30 minutes using a bellows milder to obtain a polymerizable monomer composition. Droplets were granulated.
- the aqueous dispersion of the granulated polymerizable monomer composition was placed in a reactor equipped with a stirring blade, heated to 90 ° C., and the polymerization reaction was performed.When the polymerization conversion reached almost 100%, And 2,2, -azobis (2-methyl_N- (2-hydroxyethyl) -propionamide (Wako Pure Chemical Industries, Ltd.) dissolved in an aqueous dispersion of the polymerizable monomer for shell and 65 parts of distilled water. (Trade name: VA-086) was placed in a reactor and the polymerization was continued for another 8 hours, after which the reaction was stopped to obtain an aqueous dispersion of colored resin particles. By performing the same operation as in Example 1, an electrostatic image developing toner was obtained. The evaluation of the characteristics, images, and the like was performed in the same manner as in Example 1. The results are shown in Table 2.
- release agent 10 parts of the wax obtained as above is wet-pulverized in 90 parts of styrene using a media-type wet pulverizer to obtain a styrene monomer in which the release agent is uniformly dispersed.
- a release agent dispersion was prepared.
- High-speed stirrer TK homomixer (manufactured by Tokushu Kika Kogyo) 650 parts of ion-exchanged water and 0.1 mol / L Na PO aqueous solution 5
- aqueous continuous phase (aqueous medium) containing O 2) was prepared.
- dispersoids 39 parts of styrene, 11 parts of n-butyl acrylate, 10 parts of carbon black (trade name “# 25”, manufactured by Mitsubishi Chemical Corporation) and a negative charge controlling agent (azo-based iron complex)
- the polymerizable monomer composition was charged into the aqueous medium, and the mixture was stirred for 15 minutes under a nitrogen atmosphere at a liquid temperature of 70 ° C. while maintaining the rotation speed of a high-speed stirrer at 12, OOO rpm. Granulated. Thereafter, the stirrer was changed to a propeller type stirring blade, and maintained at 70 ° C for 10 hours while stirring at 50 rpm to obtain a suspension.
- the pressure in the flask was reduced to about 50 kPa by a vacuum pump, the liquid temperature of the aqueous medium was set to 80 ° C., and distillation was performed for 10 hours. Thereafter, the suspension was cooled, the dispersion stabilizer was removed by adding dilute hydrochloric acid, the colored resin particles were separated by filtration, and washing with water was repeated several times.
- the colored resin particles are charged into a cylindrical container having a jacket, the cylindrical container is rotated while flowing warm water at 50 ° C into the jacket, and the inside of the reaction container is further reduced in pressure to about 10 kPa and dried. For 10 hours to obtain dried colored resin particles. Thereafter, the same operation as in Example 1 was performed to obtain a toner for developing an electrostatic charge image. The properties and images of the obtained electrostatic image developing toner were evaluated in the same manner as in Example 1.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/590,027 US20070172751A1 (en) | 2004-02-27 | 2005-02-23 | Toner for developing electrostatic latent image |
JP2006510427A JPWO2005081639A1 (ja) | 2004-02-27 | 2005-02-23 | 静電荷像現像用トナー |
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JP2004052966 | 2004-02-27 |
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WO2005081639A1 WO2005081639A1 (ja) | 2005-09-09 |
WO2005081639A2 true WO2005081639A2 (ja) | 2005-09-09 |
WO2005081639A3 WO2005081639A3 (ja) | 2005-11-03 |
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US (1) | US20070172751A1 (ja) |
JP (1) | JPWO2005081639A1 (ja) |
CN (1) | CN1922552A (ja) |
WO (1) | WO2005081639A2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008191189A (ja) * | 2007-01-31 | 2008-08-21 | Nippon Zeon Co Ltd | 静電荷像現像用トナー |
JP2010055019A (ja) * | 2008-08-29 | 2010-03-11 | Sanyo Chem Ind Ltd | トナー組成物 |
JP2011133648A (ja) * | 2009-12-24 | 2011-07-07 | Nippon Zeon Co Ltd | 静電荷像現像用トナー |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080311502A1 (en) * | 2004-08-04 | 2008-12-18 | Zeon Corporation | Toner For Development of Electrostatic Image |
JP2008249989A (ja) * | 2007-03-30 | 2008-10-16 | Nippon Zeon Co Ltd | フルカラー画像形成方法 |
US8460846B2 (en) * | 2007-03-30 | 2013-06-11 | Kao Corporation | Toner for electrostatic image development |
CN106575091B (zh) * | 2014-08-18 | 2020-12-01 | 日本瑞翁株式会社 | 静电图像显影用调色剂 |
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US4745418A (en) * | 1986-04-30 | 1988-05-17 | Minnesota Mining And Manufacturing Company | Reusable developing powder composition |
EP1330682B1 (en) * | 2000-09-29 | 2011-03-30 | Zeon Corporation | Toner,production process thereof, and process for forming image |
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2005
- 2005-02-23 US US10/590,027 patent/US20070172751A1/en not_active Abandoned
- 2005-02-23 WO PCT/JP2005/002859 patent/WO2005081639A2/ja active Application Filing
- 2005-02-23 JP JP2006510427A patent/JPWO2005081639A1/ja not_active Withdrawn
- 2005-02-23 CN CNA2005800060228A patent/CN1922552A/zh active Pending
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JP2003114544A (ja) * | 2001-07-30 | 2003-04-18 | Canon Inc | 磁性トナー |
JP2003177568A (ja) * | 2001-09-21 | 2003-06-27 | Ricoh Co Ltd | 乾式トナー及びその製造方法、並びに現像方法、転写方法 |
WO2003040196A1 (fr) * | 2001-11-05 | 2003-05-15 | Zeon Corporation | Procede permettant la separation des composants volatils contenus dans une dispersion de particules polymeres |
JP2003322997A (ja) * | 2002-04-30 | 2003-11-14 | Nippon Zeon Co Ltd | 静電荷像現像用トナー |
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JP2004294997A (ja) * | 2003-03-28 | 2004-10-21 | Nippon Zeon Co Ltd | 静電荷像現像用トナー |
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JP2008191189A (ja) * | 2007-01-31 | 2008-08-21 | Nippon Zeon Co Ltd | 静電荷像現像用トナー |
US8067140B2 (en) | 2007-01-31 | 2011-11-29 | Zeon Corporation | Toner for developing electrostatic image and method of producing the same |
JP2010055019A (ja) * | 2008-08-29 | 2010-03-11 | Sanyo Chem Ind Ltd | トナー組成物 |
JP2011133648A (ja) * | 2009-12-24 | 2011-07-07 | Nippon Zeon Co Ltd | 静電荷像現像用トナー |
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US20070172751A1 (en) | 2007-07-26 |
CN1922552A (zh) | 2007-02-28 |
JPWO2005081639A1 (ja) | 2007-10-25 |
WO2005081639A3 (ja) | 2005-11-03 |
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