JPH11212303A - Electrostatic charge latent image developing toner, developer, and image forming method using that toner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a homogeneous image of high density with using a dye which can be uniformly dispersed in a toner by incorporating a specified yellow dye. SOLUTION: This toner contains a yellow dye expressed by formula I. In formula I, A is a substd. or unsubstd. phenyl or substd. or unsubstd. naphthyl group, B is a substd. or unsubstd. phenyl, naphthyl or heterocyclic group, A- CH=N-B includes groups of ortho-ortho-dihydroxy-azomethine dyes expressed by formula II which include an azomethine dye developing agent having substituents which develop silver halides in the A and/or B parts, R<1> is an alkyl, fluoroalkyl, alkoxyalkyl, phenyl, phenylamino group or a group having an effect to develop silver halides, R<2> is an alkylfluoroalkyl, alkoxyalkyl, phenyl or phenylamino group, R<3> is hydrogen, a lower alkyl, phenyl group or a group having an effect to develop silver halides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner for developing an electrostatic latent image, a developer and an image forming method using the toner.

[0002]

2. Description of the Related Art Conventionally, toners used for electrophotographic development are generally prepared by melting and kneading a colorant (carbon black, magnetic powder, pigment, etc.), a charge control agent, and other additives into a thermoplastic resin. It is manufactured by crushing and classifying.

However, the above-described method of producing a toner by pulverization has various disadvantages. Firstly, equipment for many processes such as a polymerization device for resin production, a device for kneading, a crusher, a classifier, etc. is required, and the cost is high because the number of processes is large and energy consumption is large. It has become a cause. In particular, in recent years, in order to improve image quality, the tendency of a smaller particle size and a sharper particle size distribution has been strengthened, resulting in higher cost. Second, it is extremely difficult for the colorant and other additives in the kneading step to be uniformly dispersed in the resin,
Therefore, the toner produced by this method has different charging characteristics of each particle due to poor dispersion of the colorant, the charge controlling agent, and the like, which leads to a reduction in resolution.

[0004] In order to improve the various drawbacks of the toner obtained by the pulverization method, a method for producing a polymerized toner by an emulsion polymerization method or a suspension polymerization method has been proposed (JP-B-36-10231, JP-B-36-10231). No. 47-518305,
JP-B-51-14895, etc.).

In particular, it is difficult to uniformly add a colorant to a toner, and it is difficult to obtain a high-density and uniform image. In addition, when printing on a transparent sheet or the like and displaying an image by transmitting light, there is a disadvantage that a transparent image is hardly obtained.

[0006]

However, polymerized toners have various problems.

In particular, it has been difficult to uniformly add a colorant to the toner, and it has been difficult to obtain a high-density and uniform image. In addition, when printing on a transparent sheet or the like and displaying an image by transmitting light, there is a disadvantage that a transparent image is hardly obtained.

An object of the present invention is to obtain a high-density and uniform image by using a dye which can be uniformly dispersed in a toner.

Another object of the present invention is to obtain a transparent image by printing on a transparent sheet or the like and displaying the image by transmitting light.

[0010]

SUMMARY OF THE INVENTION The above-mentioned object of the present invention is as follows.
This is achieved by the following configuration.

(1) An electrostatic latent image developing toner containing a yellow dye represented by the following general formula (1):

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In the formula, A represents a substituted or unsubstituted phenyl or a substituted or unsubstituted naphthyl group; B represents a substituted or unsubstituted phenyl, naphthyl or heterocyclic group;
The A-CH = NB is represented by the formula A

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An ortho-, ortho-dihydroxy-azomethine dye represented by the formula (1), provided that the azomethine dye developing agent which is an azomethine dye having a silver halide developable substituent in part A and / or B is included; ¹ represents an alkyl, fluoroalkyl, alkoxyalkyl, phenyl, phenylamino or a group having a silver halide developing action,
R ² represents alkylfluoroalkyl, alkoxyalkyl, phenyl or phenylamino; R ³ represents hydrogen, lower alkyl, phenyl or a group having a silver halide developing action.

(2) An electrostatic latent image developing toner containing a yellow dye represented by the following general formula (2):

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In the formula, A represents a substituted or unsubstituted phenyl or a substituted or unsubstituted naphthyl group; B represents a substituted or unsubstituted phenyl, naphthyl or heterocyclic group;
= NB is the formula A

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X includes an azomethine dye developer which is an azomethine dye having a silver halide developable substituent in part A and / or B, wherein X is an ortho or ortho-dihydroxyazomethine dye represented by the formula: R ⁴ represents a lower alkyl, hydroxyl, hydrogen or a group having a dihydroxyphenyl silver halide developing function, provided that X represents an atomic group necessary for completing an aliphatic, aromatic or heterocyclic ring;
When R represents an atom group necessary for completing an aromatic ring, R ⁴ represents a group other than hydroxyl, and at least one of the above-mentioned moieties includes a group having a dihydroxyphenyl silver halide developing action. And therefore dye molecules and / or
Alternatively, the ligand portion binding the chromium atom with two oxygen atoms contains at least one group having a developing action.

(3) An electrostatic latent image developing toner comprising a cyan dye represented by the following general formula (3):

Embedded image General formula (3)

Wherein the 16 present on the phthalocyanine ring
At least one and no more than 4 R ⁵ substituents
Is given as an R ⁶ group, there is no more than two R ⁶ per ring on any benzene ring and the remaining R ⁵ substituents are
⁷ groups, and R ⁶ is composed of a group (-A) n-E;
N is 1, and E is a silver halide photographic emulsion exposed by at least two groups selected from the group consisting of hydroxyl and amino groups occupying ortho or para positions to each other. Wherein M is a metal selected from the group consisting of cobalt, nickel, copper, chromium, magnesium and zinc, and each R ⁷ is -CH ₃ ,-
_{OCH 3, -OC 2 H 5,} -SO 3 H, Cl, made of the same or different member selected from the group consisting of Br and hydrogen.

(4) The BET specific surface area containing the yellow dye represented by the general formula (1) is 5 to 100 m ² /
g. a toner for developing an electrostatic latent image.

(5) The BET specific surface area containing the yellow dye represented by the general formula (2) is 5 to 100 m ² / g.
A toner for developing an electrostatic latent image.

(6) An electrostatic latent image developing toner comprising a cyan dye represented by the general formula (3) and having a BET specific surface area of 5 to 100 m ² / g.

(7) The BET specific surface area containing the yellow dye represented by the above general formula (1) is from 5 to 100 m ² / g.
A developer comprising the toner for an electrostatic latent image.

(8) The BET specific surface area containing the yellow dye represented by the general formula (2) is 5 to 100 m ² / g.
A developer comprising the toner for an electrostatic latent image.

(9) The BET specific surface area containing the cyan dye represented by the general formula (3) is 5 to 100 m ² / g.
A developer comprising the toner for an electrostatic latent image.

(10) The latent image formed on the electrostatic latent image carrier is converted into a static image having a BET specific surface area containing a yellow dye represented by the above general formula (1) of 5 to 100 m ² / g. An image forming method comprising developing with a toner for a charge latent image.

(11) The latent image formed on the electrostatic latent image carrier is converted into a static image having a BET specific surface area containing a yellow dye represented by the above general formula (2) of 5 to 100 m ² / g. An image forming method comprising developing with a toner for a charge latent image.

(12) The latent image formed on the electrostatic latent image carrier is converted to a static image having a BET specific surface area of 5 to 100 m ² / g containing a cyan dye represented by the general formula (3). An image forming method comprising developing with a toner for a charge latent image.

That is, the present invention uses a yellow dye represented by the general formula (1) or (2) or a cyan dye represented by the general formula (3), which can be homogeneously dispersed in a toner, High-quality, homogeneous images,
Further, when printing on a transparent sheet or the like and displaying an image by transmitting light, a toner capable of obtaining a transparent image, a developer having the toner, and an image forming method developed with the toner are described. To provide.

Hereinafter, the present invention will be described specifically.

The toner of the present invention is characterized by containing a yellow dye represented by the following general formula (1) or (2).

[0031]

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In the formula, A represents a substituted or unsubstituted phenyl or a substituted or unsubstituted naphthyl group, B represents a substituted or unsubstituted phenyl, naphthyl or heterocyclic group;
A-CH = N- is a formula

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An ortho- or ortho-dihydroxy-azomethine dye represented by the formula (1), provided that an azomethine dye developing agent which is an azomethine dye having a silver halide developable substituent in part A and / or B is included; Is the group of atoms necessary to complete an aliphatic, aromatic or heterocyclic ring, preferably 5
Represents a group of atoms necessary to complete a 6-membered aliphatic ring or a benzene ring, which may have a substituent and may have a group having a silver halide developing action,
¹ is alkyl, fluoroalkyl, alkoxyalkyl, wherein the alkyl portion is preferably lower alkyl, and represents a phenyl, phenylamino or group exhibiting a silver halide developing action, and R ² alkyl, fluoroalkyl, alkoxyalkyl, provided that The alkyl group preferably represents lower alkyl, and represents phenyl or phenylamino; R ³ represents hydrogen, lower alkyl, phenyl or phenylamino; R ³ represents hydrogen, lower alkyl;
Represents a group having a phenyl or silver halide developing action,
R ⁴ represents a group having a lower alkyl, hydroxyl, hydrogen, or dihydroxyphenyl silver halide developing action, provided that when X represents a group of atoms necessary to complete an aromatic ring, R ⁴ represents a group other than hydroxyl. At least one of said moieties contains a group having a dihydroxyphenyl silver halide developing action, and thus a dye moiety and / or a ligand moiety linking two oxygen atoms to a chromium atom. Includes at least one group having a developing action. The preferred yellow dye of the present invention represented by the general formula (1) or (2) is represented by any of the following general formulas.

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[0034]

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The most preferred metal complex salt is represented by the following general formula.

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Here, the alkylene moiety represents one having 1 to 4 carbon atoms, that is, methylene, ethylene, propylene, butylene or isobutylene.

The following compounds are examples of the yellow dye developing agent (or a protected derivative thereof) represented by the general formula (1) or (2) of the present invention.

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[0038]

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[0039]

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[0040]

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[0041]

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[0042]

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[0043]

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[0044]

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[0045]

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[0046]

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[0047]

Embedded image These dyes can be synthesized, for example, according to the method described in JP-B-49-2618. The electrostatic latent image developing toner of the present invention is characterized by containing a cyan dye represented by the following general formula (3).

[0048]

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Wherein 16 present on the phthalocyanine ring
At least one and no more than 4 R ⁵ substituents
⁵ is given as an R ⁶ group, and one on every benzene ring
There are no more than two R ⁶ per unit, the remaining R ⁵ substituents are R ⁷ groups, where R ⁶ is a group (-A) n-E, A is a divalent organic linking group, n Is 1 and E is substituted by at least two groups selected from the group consisting of hydroxyl and amino groups occupying ortho or para positions with respect to each other so that the exposed silver halide photographic emulsion can be developed. Is benzene, M is a metal selected from the group consisting of cobalt, nickel, copper, chromium, magnesium and zinc, and each R ⁷ is —CH ₃ ,
_{OCH 3, -OC 2 H 5,} -SO 3 H, Cl, made of the same or different member selected from the group consisting of Br and hydrogen.

Examples of the cyan dye developer represented by formula (3) of the present invention include the following compounds.

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[0051]

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[0052]

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[0053]

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[0054]

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[0055]

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[0056]

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[0057]

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[0058]

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[0059]

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[0060]

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[0061]

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[0062]

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[0063]

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[0064]

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[0065]

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[0066]

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[0067]

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[0068]

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[0069]

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[0070]

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[0071]

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[0072]

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[0073]

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The cyan dye developer represented by the general formula (3) of the present invention can be produced, for example, according to the method described in JP-B-48-32130.

The toner for developing an electrostatic latent image according to the present invention is BET.
The toner has a specific surface area of 5 to 100 m ² / g, and preferably 5 to 50 m ² / g.
More preferably, 5 to 40 m ² / g, particularly preferably 1 to 40 m ² / g.
0 to 40 m ² / g. The BET specific surface area is measured by a one-point method of a nitrogen adsorption method, and a specific measuring device is Flow Soap 2300 (Shimadzu Corporation).

That is, those having an excessive BET value specific surface area have very fine irregularities, and are difficult to manufacture. Further, even if a surface having such a surface is obtained, the surface becomes finer than the irregularities contributing to charging, and the effect becomes saturated.

The toner of the present invention comprises at least a yellow dye represented by the above formula (1) or (2) or a formula (3) as a resin and a colorant.
Contains at least one cyan dye represented by
If necessary, a releasing agent or a charge controlling agent, which is a fixing property improving agent, can be contained. Further, external additives composed of inorganic fine particles and organic fine particles may be added to so-called colorant particles composed of a resin and a colorant. In any case, the toner of the present invention contains a yellow dye represented by the general formula (1) or (2) or a cyan dye represented by the general formula (3) as a coloring agent, and has a BET specific surface area. 5-100 m ² / g
It is characterized by being. The toner of the present invention may be obtained by pulverizing elementary particles obtained by melting and kneading a resin, a colorant, and the like to obtain a powder having a desired shape coefficient. Emulsion polymerization by mixing the agents, to produce fine polymer particles, and then can be produced by a method of adding and associating an organic solvent, a coagulant, and the like,
In the present invention, this method is preferably used.

That is, the polymerizable monomer, an additive necessary for the toner, and an additive suitable for effectively polymerizing the polymerizable monomer were mixed, and emulsion polymerization was performed as an emulsified dispersion to obtain an emulsion. In this method, polymer particles, that is, the toner of the present invention, are obtained by associating and polymerizing polymer fine particles in the presence of an organic solvent and a coagulant.
Additives necessary for the toner include external additives such as a colorant, a charge control agent and a lubricant, and additives necessary for effectively polymerizing a polymerizable monomer include a surfactant and a polymerization agent. Initiators and the like.

[1] Various Materials Obtained for Use in the Present Invention (1) Polymerizable Monomer As the polymerizable monomer, a hydrophobic monomer is an essential component, and if necessary, a hydrophilic monomer is used. A monomer or a crosslinkable monomer is used. 1) Hydrophobic monomer The hydrophobic monomer constituting the monomer component is not particularly limited, and a conventionally known monomer may be used. it can. In addition, one kind or a combination of two or more kinds can be used so as to satisfy required characteristics.

Specifically, monovinyl aromatic monomers,
It is possible to use (meth) acrylate monomers, vinyl ester monomers, vinyl ether monomers, monoolefin monomers, diolefin monomers, halogenated olefin monomers, and the like. it can.

As the vinyl aromatic monomer, for example,
Styrene, o-methylstyrene, m-methylstyrene,
p-methylstyrene, p-methoxystyrene, p-phenylstyrene, p-chlorostyrene, p-ethylstyrene, p-n-butylstyrene, p-tert-butylstyrene, p-n-hexylstyrene, p-n- Styrene-based monomers such as octylstyrene, pn-nonylstyrene, pn-decylstyrene, pn-dodecylstyrene, 2,4-dimethylstyrene, and 3,4-dichlorostyrene, and derivatives thereof. .

As the acrylic monomer, acrylic acid,
Methacrylic acid, methyl acrylate, ethyl acrylate,
Butyl acrylate, 2-ethylhexyl acrylate,
Cyclohexyl acrylate, phenyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, β-hydroxyethyl acrylate, γ-aminopropyl acrylate, stearyl methacrylate, methacryl Dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate and the like.

Examples of the vinyl ester monomer include vinyl acetate, vinyl propionate, vinyl benzoate and the like.

Examples of the vinyl ether monomer include vinyl methyl ether, vinyl ethyl ether, vinyl isobutyl ether, vinyl phenyl ether and the like.

Examples of the monoolefin monomer include ethylene, propylene, isobutylene, 1-butene, 1-pentene and 4-methyl-1-pentene.

Examples of the diolefin-based monomer include butadiene, isoprene, chloroprene and the like.

2) Hydrophilic monomer The hydrophilic monomer constituting the monomer component is not particularly limited, and a conventionally known monomer can be used. Further, one kind or a combination of two or more kinds can be used so as to satisfy required characteristics.

For example, amine compounds such as carboxyl group-containing monomers, sulfonic acid group-containing monomers, primary amines, secondary amines, tertiary amines and quaternary ammonium salts can be used. it can.

Examples of the carboxylic acid group-containing monomer include fumaric acid, maleic acid, itaconic acid, cinnamic acid, monobutyl maleate and monooctyl maleate.

Examples of the sulfonic acid group-containing monomer include styrene sulfonic acid, allyl sulfosuccinic acid, and octyl allyl sulfosuccinate.

Examples of the amine compound include dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, 3-dimethylaminophenyl acrylate, and 2-hydroxy-3-methacryloxypropyltrimethylammonium salt. And the like.

3) Crosslinkable monomer A crosslinkable monomer may be added to improve the properties of the polymer particles. As crosslinkable monomers, divinylbenzene,
Divinyl naphthalene, divinyl ether, diethylene glycol methacrylate, ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate,
Those having two or more unsaturated bonds such as diallyl phthalate are exemplified.

The monomers according to the present invention are suitably selected such that the hydrophobic monomer is in the range of about 99.9 to about 85% by weight and the hydrophilic monomer is in the range of about 0.1 to about 15% by weight. You.

(2) Chain Transfer Agent For the purpose of adjusting the molecular weight, a commonly used chain transfer agent can be used.

The chain transfer agent is not particularly restricted but includes, for example, mercaptans such as octyl mercaptan, dodecyl mercaptan and tert-dodecyl mercaptan, and styrene dimers.

(3) Polymerization Initiator The radical polymerization initiator used in the present invention can be appropriately used as long as it is water-soluble. For example, lead persulfate (potassium persulfate, ammonium persulfate, etc.), azo compounds (4,
4'-azobis-4-cyanovaleric acid and its salt, 2,2 '
-Azobis (2-amidinopropane) salt, etc.), peroxide compounds and the like.

Further, the above-mentioned radical polymerization initiator may be combined with a reducing agent, if necessary, to form a redox initiator. By using a redox-based initiator, the heavy activity increases, the polymerization temperature can be reduced, and the polymerization time can be expected to be further reduced.

As the polymerization temperature, any temperature may be selected as long as it is equal to or higher than the minimum radical generation temperature of the polymerization initiator. For example, a temperature in the range of 50 ° C. to 80 ° C. is used. However, it is also possible to polymerize at room temperature or higher by using a combination of a polymerization initiator started at room temperature, for example, a hydrogen peroxide-reducing agent (such as ascorbic acid).

(4) Ionic surfactant The surfactant is a sulfonate (sodium dodecylbenzenesulfonate, sodium arylalkylpolyethersulfonate, 3,3-disulfondiphenylurea).
4,4-diazo-bis-amino-8-naphthol-6
Sodium sulfonate, ortho-carboxybenzene-
Azo-dimethylienine, 2,2,5,5-tetramethyl-
Triphenylmethane-4,4-diazo-bis-β-naphthol-6-sulfonate, etc.), sulfates (sodium dodecyl sulfate, sodium tetradecyl sulfate, sodium pentadecyl sulfate, sodium octyl sulfate, etc.), fatty acid salts (olein, etc.) Sodium silicate, sodium laurate, sodium caprate, sodium caprylate, sodium caproate, potassium stearate, calcium oleate, etc.).

The term “ionic surfactant” used in the present invention is as described above, and is mainly used as a polymerization agent during emulsion polymerization, but may be used for other steps or purposes.

(5) Surface Modifier As the surface modifier for the colorant, a conventionally known one can be used. Specifically, silane compounds, titanium compounds, aluminum compounds and the like can be preferably used.

Examples of the silane compound include alkoxysilanes such as methyltrimethoxysilane, phenyltrimethoxysilane, methylphenyldimethoxysilane and diphenyldimethoxysilane; silizane such as hexamethyldisilozane; γ-chloropropyltrimethoxysilane; vinyltrichlorosilane , Vinyltrimethoxysilane, vinyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane,
γ-aminopropyltriethoxysilane, γ-ureidopropyltriethoxysilane, and the like.

Examples of the titanium compound include, for example, TTS, 9S, 38S, 41B, 46B, 55, and 138, which are commercially available under the trade name “Plenact” manufactured by Ajinomoto Co.
S-1, 238S, etc., commercial products A-1 and B- manufactured by Nippon Soda Co., Ltd.
1, TOT, TST, TAA, TAT, TLA, TO
G, TBSTA, A-10, TBT, B-2, B-4,
B-7, B-10, TBSTA-400, TTS, TO
A-30, TSDMA, TTAB, TTOP and the like.

As the aluminum compound, for example, "Plenact AL-M" manufactured by Ajinomoto Co., etc. can be mentioned.

As the aluminum compound, for example, “Plenact AL-M” manufactured by Ajinomoto Co., etc. can be mentioned.

The concentration of these surface modifiers is 0.01 to 20 wt%, preferably 1 to 15 wt%, based on the colorant.
% Is selected.

(6) Inorganic Fine Particles As the inorganic fine particles, conventionally known inorganic fine particles can be used. Specifically, silica, titanium, alumina fine particles and the like can be preferably used.

Examples of the silica fine particles include, for example, commercially available products R-805, R-976, and R-95 manufactured by Nippon Aerosil Co., Ltd.
974, R-972, R-812, R-809, HVK-2150 and H-200 manufactured by Hoechst Co., Ltd., and commercial products TS-720, TS-530, TS manufactured by Cabot Co., Ltd.
-610, H-5, MS-5 and the like.

Examples of titanium fine particles include commercially available products T-805 and T-604 manufactured by Nippon Aerosil Co., Ltd., and commercially available products MT-100S and MT-100B manufactured by Teica Co., Ltd.
MT-500BS, MT-600, MT-600SS,
JA-1, commercial product TA-300S manufactured by Fuji Titanium Co., Ltd.
I, TA-500, TAF-130, TAF-510,
TAF-510T, commercial product IT- manufactured by Idemitsu Kosan Co., Ltd.
S, IT-OA, IT-OB, IT-OC and the like.

Examples of the fine alumina particles include commercial products RFY-C and C-604 manufactured by Nippon Aerosil Co., Ltd. and commercial products TTO-55 manufactured by Ishihara Sangyo Co., Ltd.

[2] Electrophotographic toner When used for electrophotographic toner, it is more useful not only as a resin for a pulverized toner but also as a polymerized toner.

When the colored polymer particles of the present invention are used as an electrophotographic toner, it is necessary to include components to be added to the polymer as a toner. Examples of the above components include a charge control agent and a fixing improver. These components can be derived by adding a desired content to the polymerizable monomer.

Further, when the colored polymer particles of the present invention are used as an electrophotographic toner, a post-additive (referred to as external addition) for improving fluidity and chargeability can be blended and used. .

(1) Fixing improver Known fixing improvers are used. Generally, a polyolefin type is used. For example, low molecular weight polyethylene, low molecular weight polypropylene, oxidized polyethylene and polypropylene, acid modified polyethylene and polypropylene, and the like are used.

(2) Charge Control Agent A known charge control agent is also used. However, when a monomer having a polar group on the polymer particle surface is copolymerized, it may not be necessary in some cases. As used herein, the polar group refers to a charged group such as a carboxyl group, a sulfonic acid group, an amino group, and an ammonium base, regardless of whether they are positive or negative.

Examples of the charge control agent include a nigrosine-based electron-donating dye having a positive charge, a metal salt of naphthenic acid or a high fatty acid, an alkoxylated amine, a quaternary ammonium salt, an alkylamide, a metal complex, a pigment, fluorine Examples of the treatment activator include an organic complex having an electron accepting property as a negative charge, chlorinated paraffin, chlorinated polyester, and sulfonylamine of copper phthalocyanine.

(3) External Additives The external additive can be used as a fluidizing agent having fine particles such as a fluidizing agent, a charge controlling agent and a lubricant, for example, inorganic fine powders such as hydrophobic silica, titanium oxide, alumina and the like. These sulfates, nitrides, and silicon carbide are exemplified. As the charge control agent, polyvinylidene fluoride, polystyrene powder,
Examples include polymethyl methacrylate powder and polyethylene fine particles.

(4) Lubricants Lubricant charges include, for example, cadmium, barium, nickel, cobalt, strontium, copper, magnesium, calcium salts of stearic acid, zinc oleate, manganese,
Iron, cobalt, copper, lead, magnesium salts, zinc palmitate, cobalt, copper, magnesium, silicon, calcium salts, zinc, cobalt, calcium salts of linoleic acid,
Metal salts of higher fatty acids such as zinc and cadmium salts of ricinoleic acid, zinc of caprylic acid, and zinc of caproic acid. These are added as needed.

[3] Manufacturing method (1) Surface treatment method of colorant In the surface modification method of the colorant, the colorant is dispersed in a solvent, the surface modifier is added thereto, and then the temperature is raised and the reaction is carried out. I do. After completion of the reaction, the mixture is filtered, washed repeatedly with the same solvent, and dried to obtain a pigment treated with a surface modifier.

(2) Dispersion of Colorant The colorant is dispersed in the aqueous phase at a surfactant concentration of CMC or higher. As the dispersion method, mechanical stirring, for example, a medium-type disperser such as a sand grinder, sonication, for example, ultrasonic dispersion, a homogenizer, pressure dispersion, for example, Menton-Gaulin and the like are used.

(3) Method for Producing Colored Polymer Particles The method for producing pigment-containing polymer particles of the present invention comprises dispersing a colorant treated with a surface modifier in an aqueous solution having a surfactant dispersion concentration of CMC or higher. When the surfactant concentration is C
Dilute to below MC. A method of dissolving a water-soluble radical polymerization initiator in the dispersion, adding an ethylenically unsaturated monomer and performing aqueous precipitation polymerization to obtain pigment-containing polymer particles, wherein the colorant is contained in the polymer particles. Let it.

(4) Associative Fusing Step Using the pigment-containing composite particles produced in the associating and fusing step, association and fusion are performed to produce a non-spherical toner.

Various methods for associative fusion can be used, for example, JP-A-60-220358 and JP-A-4-28446.
No. 1 etc. However, with these methods, it is quite difficult to control the desired particle size and particle size distribution. Thus, the present inventors have proposed the method of JP-A-5-115572, that is, a method of adding a coagulant having a critical coagulation concentration of the polymer fine particle dispersion or more and an organic solvent infinitely soluble in water to add non-spherical particles. Generated.

As described above, the colored particles serving as the base of the toner are obtained. Generally, in the method for producing polymer particles, a dispersant, an emulsifier, a surfactant and the like are used in combination in the polymerization step. If the hydrophilic substance remains in the final toner, poor chargeability due to the hydrophilicity,
In particular, environmental differences in charging performance become remarkable, and a stable image cannot be obtained.

Therefore, a step of washing the resin fine particles formed by the polymerization method and removing these hydrophilic substances is essential. As a washing method, a method of repeating washing with water and filtration is generally used. In some cases, a water-soluble solvent such as methanol or ethanol may be mixed with water.

The colored resin fine particles thus obtained are
Finally, it is necessary to perform a solid-liquid separation operation so as to obtain a dry powdery toner. First, a method in which the colored resin fine particles are obtained in a wet state by a method such as decantation, filtration, or centrifugal separation, and then the remaining water is removed by heat, reduced pressure, or the like to obtain a dry state is preferably used. Usually, at this time, the colored resin particles do not reach a state in which the particles themselves are fused, but are obtained as so-called physical aggregates, that is, as dry aggregates in the form of blocks or flakes.

By deaggregating these aggregates, that is, by loosening the aggregated and dried colored resin fine particles to the particles of the toner alone, it is possible to prevent problems caused by aggregates generated by the dried toner. .

As a specific method, a method is used in which the toner itself is dried and agglomerated so that the toner itself is not pulverized.
It is necessary to apply a mechanical impact and break up into individual, individual particle states. That is, it is achieved by a method of mixing and stirring by a dry-type mixer or a method of passing the aggregates through an air-flow-type pulverizer having reduced pulverizing air pressure, and particularly preferably, at the bottom of a container such as a Henschel mixer. When crushing is performed by a mixer with the provided high-speed rotating blades, in addition to the particularly excellent crushing effect, since a moderate impact force is not given to each fine particle, the destruction of the colored resin fine particles is particularly prevented. This is a particularly preferable method because it hardly occurs. More specifically, the peripheral speed of the high-speed rotating blade of the Henschel mixer is preferably 15 to 50 m / sec, more preferably 20 to 40 m.
/ Sec, it is possible to achieve efficient crushing while preventing destruction of the associated fine particles.

If the block or flake-like aggregates before the deagglomeration are coarse, a preliminary crushing step using a hammer mill or the like may be provided as a preliminary crushing step.

Further, an external additive required for the toner is thrown into the crushing system simultaneously with the aggregate or during the crushing process of the aggregate, and externally added to the surface of the colored resin particles together with the crushing process. An agent can also be applied. When the external additive is added during the middle of the crushing step, the operating conditions of the crusher before and after the addition may be changed within a range of suitable conditions.

The image forming method of the present invention will be described below.

In the image forming method of the present invention, the latent image formed on the electrostatic latent image carrier is developed with the electrostatic latent image developing toner of the present invention.

The developing method using the toner of the present invention is not particularly limited, and can be suitably used in a contact developing method or a non-contact developing method. For the development by the contact method, the layer thickness of the developer having the toner of the present invention is 0.1 to 8 mm, preferably 0.4 to 5 mm in the development area, and the developer is raised in the development area. Developed by a so-called magnetic brush developing method. In this case, the gap between the photoreceptor and the developer carrier is 0.15 to 7 mm, particularly 0.2.
It is preferably about 4 mm.

In the non-contact developing method, the developing layer formed on the developer carrying member does not come into contact with the photoreceptor. To constitute this developing method, the developing layer is formed as a thin layer. Is preferably performed. According to this method, a developer layer having a thickness of 20 to 500 μm is formed in a development region on the surface of the developer carrier, and a gap between the photoconductor and the developer carrier has a larger gap than the developer layer.

In particular, the toner of the present invention has a high charge rising property and is useful for a non-contact development system. That is, in the non-contact developing method, since the change in the developing electric field is large, a slight change in the charging greatly affects the development itself. For this reason, a change in the developability such as an image and a density is increased due to a delicate change in the charge amount of the toner. However, since the toner of the present invention has a high charge rising property, the change in charge is small and a stable charge amount can be secured, so that a stable image can be formed over a long period even in the non-contact developing method. it can.

In the non-contact method, the magnetic layer is formed by a method of pressing a developer layer regulating rod against the surface of a developer plate or a magnetic plate using a magnetic force for forming a thin layer. Further, there is a method in which a urethane plate, a phosphor bronze plate or the like is brought into contact with the developer surface to regulate the developer layer. The pressing force of the pressing regulating member is preferably from 1 to 15 gf / mm. When the pressing force is small, the conveyance is likely to be unstable because the regulating force is insufficient. On the other hand, when the pressing force is large, the stress on the developer is increased, and the durability of the developer is likely to be reduced. A preferred range is 3 to 10 gf / mm. Further, in the non-contact developing system, it is preferable to apply a developing bias voltage at the time of development. In this case, either a method of applying only a DC component or a method of superimposing and applying an AC bias may be used.

The size of the developer carrying member is as follows.
Those holding magnetism inside 0 to 40 mm are preferable. If the diameter is too small, the mixing of the developer will be insufficient,
It is difficult to ensure sufficient mixing to give sufficient charge to the toner, and if the diameter is too large, the centrifugal force on the developer increases, and the problem of toner scattering tends to occur.

Hereinafter, an example of the non-contact developing system will be described with reference to FIG.

FIG. 1 is a schematic view of a non-contact developing type developing unit which can be suitably used in the image forming method of the present invention. Reference numeral 1 denotes a photosensitive member, 2 denotes a developer carrier, and 3 denotes a toner of the present invention. Contained two-component developer, 4 is a developer layer regulating member, 5 is a development area, 6 is a developer layer, and 7 is a power supply for forming an alternating electric field.

The two-component developer containing the toner of the present invention is carried by a magnetic force on a developer carrier 2 having a magnet 2B therein, and is conveyed to the development area 5 by movement of the development sleeve 2A. At the time of this conveyance, the developer layer 6 is regulated by the developer layer regulating member 4 to a layer having a thickness so as not to come into contact with the photoconductor 1 in the developing region 5.

The minimum gap (Dsd) of the developing area 5 is determined by the thickness (preferably 20 to 5) of the developer layer 6 conveyed to the area.
00 μm), for example, about 100 to 1000 μm. The power source 7 for forming the alternating electric field is preferably an alternating current having a frequency of 1 to 10 kHz and a voltage of 1 to 3 kVp-p. The power supply 7 may have a configuration in which direct current is added in series to alternating current as necessary. 300 when applying DC voltage
~ 800V is preferred.

When the toner of the present invention is applied to a color image forming system, a system in which a single color image is formed on a photosensitive member and sequentially transferred to an image support (this is referred to as a sequential transfer system and is shown in FIG. 2). Alternatively, a method in which a single-color image is developed a plurality of times on a photoreceptor to form a color image and then collectively transferred to an image support (this is referred to as a collective transfer method and is shown in FIG. 3).
And the like.

The image forming method in FIGS. 2 and 3 will be described in detail below.

As the developer carrier used in the present invention, as shown in FIGS. 1 to 3, a developing device having a magnet 2B built in the carrier is used, and a sleeve forming the surface of the developer carrier is used. As 2A, aluminum or aluminum or stainless steel whose surface is oxidized is used.

Hereinafter, an example of the sequential transfer method shown in FIG. 2 will be described.

Reference numeral 11 denotes a charging device serving as a charging electrode, and reference numeral 12 denotes a developing unit including developing devices for respectively loading yellow, magenta, cyan, and black toners, and is divided into four units corresponding to four color toners. . The basic configuration of these developing units is the same as the schematic diagram of the developing unit shown in FIG. Reference numeral 14 denotes a photosensitive drum, reference numeral 13 denotes a cleaning unit, reference numeral 15 temporarily holds a single-color toner image formed on the photosensitive drum, further holds the next single-color toner image thereon, and finally holds a desired single-color toner image. Transfer drum for forming a multicolor image, 1
Reference numeral 6 denotes a transfer unit for transferring a transfer material onto which a toner image on a transfer drum is transferred. Reference numeral 17 denotes an attraction electrode provided inside the transfer drum 15 for performing corona discharge from the inside to electrostatically attract the transfer material to the drum; Reference numeral 18 denotes a transfer electrode for sequentially transferring the toner image formed on the photosensitive drum 14 to the transfer drum, 19 denotes a peel electrode for peeling off the transfer material electrostatically attracted onto the transfer drum 15, and 20 denotes after the transfer material is peeled. And a removal electrode for removing charges remaining on the transfer drum.

A charge is uniformly formed on the photosensitive drum 14 by the charging electrode 11, and thereafter, imagewise exposure (not shown) is performed to form an electrostatic latent image. This electrostatic latent image is developed by a developing device that holds one color toner (for example, black toner) of the developing unit 12, and a one color toner image is formed on the photosensitive drum 14. On the other hand, the transfer material transported onto the transfer drum 15 by the transport unit 16 is
The toner is electrostatically attracted onto the transfer drum by 7 and conveyed to the transfer unit.

The toner image formed on the photosensitive drum 14 is transferred to the transferred transfer material at the transfer section. The toner remains on the photosensitive drum 14 after the transfer of the transferred image, and the remaining toner is cleaned by the cleaning unit 13 and used for the next process. When forming a multicolor image, a toner image of another color is formed by development according to a similar process,
The image is transferred to the transfer drum 15 one by one. Eventually, a desired toner image is formed on the transfer material adsorbed on the transfer drum 15. The transfer material on which the desired toner image has been formed is peeled off by the peeling electrode 19, and is conveyed to the fixing unit.
A final fixed multicolor toner image is obtained. On the other hand, the charge remaining on the transfer drum 15 is removed by the removing electrode 20 and used for the next process.

Next, the batch transfer method will be described with reference to FIG.

The components of the apparatus are the same as those in the example shown in FIG. However, reference numeral 10 denotes a transport unit that transfers the toner image while transporting the transported transfer material. Photoconductor drum 1
An electric charge is uniformly formed on the electrode 4 by a charging electrode, and then an electrostatic latent image is formed by a latent image forming means (not shown).
This electrostatic latent image is developed by a developing device that holds one color toner (for example, black toner) of the developing unit 12, and a one color toner image is formed on the photosensitive drum. In the illustrated example, this toner image is not transferred, and a charge is uniformly formed again by the charging electrode 11 on the photosensitive drum having the toner image as it is, and further, an electrostatic latent image is formed. Then, the toner image is developed by a developing device having a toner of a different color from the above, and a toner image of another color is formed by being superimposed on the previous toner image. During this time the cleaning unit 1
3. The transfer electrode 18 and the transport unit 10 are not operated, and are retracted from the photosensitive drum 14 so as not to disturb the toner image on the photosensitive drum 14.

After the desired image formation is completed and a multicolor toner image is formed, the toner image on the photosensitive drum is transferred onto the transfer material conveyed by the conveyance unit 16 while being conveyed by the conveyance unit 10. The toner image is transferred by the electrode 18. The transfer material carrying the transferred toner image is transported to a fixing unit and fixed, and a final multicolor toner image is formed on the transfer material. Since the toner remains on the photosensitive drum 14 after the transfer of the toner image, it is cleaned by the cleaning unit 13 and used for the next process.

The toner image formed on the photoreceptor by the above-described various methods is transferred to a transfer material such as paper in a transfer step. The transfer method is not particularly limited, and various methods such as a so-called corona transfer method and a roller transfer method can be adopted.

With respect to the fixing step used in the present invention,
As an example, a roller fixing method will be described with reference to FIG.

In the present invention, the image forming method typified by FIG. 4 is such that the BET specific surface area is 5 m ² / g between the moving fixing member and the pressing member moving in contact with the fixing member.
As described above, the recording material carrying a toner image, characterized by containing a polyolefin having a polar group in the molecule, is passed therethrough, and the toner image is formed via the fixing member by a heating member fixedly arranged. This is to fix the recording material.

The fixing device shown in FIG. 4 has a heating source inside a metal cylinder 23 made of iron, aluminum, or the like having a surface 22 coated with, for example, tetrafluoroethylene or polytetrafluoroethylene-perfluoroalkylvinyl ether copolymer. Upper roller 2 having 24 (heating member)
1 (fixing member) and a lower roller 25 (pressing member) made of silicone rubber or the like. Specifically, a linear heater is provided as the heating source 24, and the surface temperature of the upper roller 21 is heated to about 110 to 220 ° C. This pressed upper roller 21
The recording material 26 carrying the toner image 27 of the present invention is passed between the recording medium 26 and the lower roller 25, and the toner image 27 is fixed on the recording material by heat melting.

In the heat roller fixing method, a part of the melted toner is fused to the upper roller 21, and after one rotation, the toner fused to the upper roller 21 is fixed to another part of the recording material. Occurs, and if it is extremely severe, the upper roller 2
The toner fused to No. 1 tends to raise the problem that the so-called wrapping phenomenon occurs and the surface of the recording material is stained. Is used, the disadvantage can be remarkably improved.

In the fixing section, pressure is applied between the upper roller 21 and the lower roller 25 to deform the lower roller 25 to form a so-called nip. The nip width is preferably from 1 to 10 mm, more preferably from 1.5 to 7 mm. The fixing linear velocity is preferably from 40 to 400 mm / sec. When the nip width is narrow, heat cannot be uniformly applied to the toner, and fixing unevenness is likely to occur. On the other hand, when the nip width is large, the melting of the toner is promoted, and the offset phenomenon is likely to occur.

In the roller fixing method used in the present invention, it is preferable to form a silicone oil film on the surface 22 of the upper roller 21. As an example, a method of forming a silicone-based oil coating film on the surface 22 of the upper roller 21 is performed as follows.

That is, the impregnating roller 28 is pressed against the surface 22 of the upper roller 21 in the longitudinal direction and rotates in the direction of the arrow. The impregnating roller 28 is impregnated with silicone oil in advance, and at the time of fixing, silicone oil is supplied to the surface of the upper roller 21 from the impregnating roller 28 by a very small amount as the upper roller 21 rotates. As a result, a silicone oil coating film is formed on the surface 22 of the upper roller 21. As for the fixing method, in addition to the above-described roller fixing, a method using a web as a fixing member is preferably used in the present invention.

[0160]

EXAMPLES The present invention will be described below in detail with reference to examples, but embodiments of the present invention are not limited thereto.

The production examples of the colored particles will be specifically described.

Production Example 1 [Preparation of Colorant Dispersion] After mixing 11.98 kg of sodium dodecyl sulfate and 2651 of ion-exchanged water with 25.6 kg of the colorant (Exemplary Compound Yellow Dye 1), Nippon Seiki Seisakusho Co., Ltd. Pressure dispersion type homogenizer (N
PH-70) to prepare a colorant dispersion. The dispersion particle size of the colorant is measured by a laser diffraction particle size distribution analyzer SALD-
As a result of measuring the particle size using 1100 (manufactured by Shimadzu Corporation), the average particle size was 0.22 μm.

[Synthesis of Colored Polymer Particles] 500 l of G equipped with a stirrer, a temperature sensor, a cooling pipe, and a nitrogen introducing device.
Into an L reactor, add 16 l of the above colorant dispersion to 250 l of degassed ion-exchange distilled water, and further add 27.86 k of styrene.
g, normal butyl acrylate 5.22 kg, methacrylic acid 1.16 kg, t-dodecyl mercaptan 0.3 k
g was added and the internal temperature was raised to 75 ° C. while stirring at a stirring speed of 500 rpm under a nitrogen stream. When the internal temperature reached 75 ° C., an aqueous polymerization initiator solution obtained by dissolving 0.82 kg of potassium persulfate in 60 l of degassed ion-exchange distilled water was added, and the mixture was polymerized for 7 hours and then cooled to room temperature. The generated particles were measured using an electrophoretic light scattering photometer ELS-800 (manufactured by Otsuka Electronics Co., Ltd.). Particle size 17
A colorant composite polymer particle dispersion 1 of 0 nm was obtained.

[Production of Non-Spherical Particles] 150 l of the above-mentioned colorant composite polymer particle dispersion 1 was placed in a stainless steel reactor equipped with a 500 l anchor stirring blade equipped with a stirrer, a temperature sensor, a cooling pipe, and a nitrogen introducing device. 100 rpm at room temperature
Stir at m. To this, 1.35 kg of Newcol 565C (manufactured by Nippon Emulsifier) was added and stirred, and then 5N hydrochloric acid was added dropwise until the pH of the solution reached 9.60. To this, an aqueous potassium chloride solution in which 12.66 kg of potassium chloride was dissolved in 70 l of ion-exchanged water was added, and then a solution in which 37 l of isopropanol and 1.00 kg of Newcol 565C were dissolved in 30 l of ion-exchanged water was added. The liquid temperature at the end of the addition was 29.0 ° C. This mixture was heated to 85 ° C. Thereafter, the reaction was carried out at a liquid temperature of 85 ° C. (fluctuation was ± 3 ° C. or less) for 6 hours, and cooled to room temperature (40 ° C. or less). This reaction solution was subjected to laser diffraction particle size distribution analyzer SALD-1.
As a result of measuring the particle size using No. 100 (manufactured by Shimadzu Corporation), non-spherical particles having a particle size of 6.07 μm were obtained. Further, after filtering the non-spherical particles, suspending and dispersing in distilled water, adjusting the pH to 13 using a 1N aqueous sodium hydroxide solution to completely dissociate the carboxylic acid, and washing twice with 200 l of water,
Further, the resultant was washed seven times with 200 l of a mixed solvent of water / MeOH = 7/3, and after removing impurities such as an ionic surfactant to a certain extent, filtration and drying were performed to obtain a non-spherical polymerized toner 1.

Production Example 2 A non-spherical polymerized toner 2 was obtained in the same manner as in Production Example 1, except that (Exemplary Compound 1) was replaced by (Exemplary Compound Yellow Dye 3).

Production Example 3 A non-spherical polymerized toner 3 was obtained in the same manner as in Production Example 1 except that (Exemplified Compound 1) was replaced with (Exemplified Compound Yellow Dye 14).

Production Example 4 A non-spherical polymerized toner 4 was obtained in the same manner as in Production Example 1, except that (Exemplified Compound 1) was replaced by (Exemplified Compound Yellow Dye 26).

Production Example 5 A non-spherical polymerized toner 5 was obtained in the same manner as in Production Example 1, except that (Exemplary Compound 1) was replaced by (Exemplary Compound Cyan Dye 1).

Production Example 6 A non-spherical polymerized toner 6 was obtained in the same manner as in Production Example 1, except that (Exemplary Compound 1) was replaced by (Exemplary Compound Cyan Dye 5).

Production Example 7 A non-spherical polymerized toner 7 was obtained in the same manner as in Production Example 1 except that (Exemplary Compound 1) was replaced by (Exemplary Compound Cyan Dye 12).

Production Example 8 A non-spherical polymerized toner 8 was obtained in the same manner as in Production Example 1 except that (Exemplary Compound 1) was replaced with (Exemplary Compound Cyan Dye 20).

Comparative Production Example 1 In Production Example 1, (Yellow Pigment CI Pigment Yellow 1) was used instead of (Exemplary Compound 1).
Comparative non-spherical polymerized toner 1 was prepared in the same manner except that 7) was used.
I got

Comparative Production Example 2 In Production Example 1, (Exemplary Compound 1) was replaced with (Yellow Pigment CI Pigment Yellow 18)
Comparative non-spherical polymerized toner 2 was prepared in the same manner except that 5) was used.
I got

Comparative Production Example 3 In Production Example 1, (Cyan Pigment CI Pigment Blue 15: 3) was used instead of (Exemplary Compound 1).
Comparative Non-spherical Polymerized Toner 3 was obtained in the same manner except for using.

Comparative Production Example 4 Comparative non-spherical polymerized toner 4 was obtained in the same manner as Production Example 1, except that (Cyan Pigment CI Pigment Blue 60) was used instead of (Exemplary Compound 1).

(BET value) The BET value was measured by a one-point method using a flow soap II2300 manufactured by Shimadzu Corporation while flowing N ₂ gas. ￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣￣
(Evaluation Example) <Production of Color Toner> 100 parts of the polymerized toner was pulverized and powdered by a Henschel pulverizer, and then 100 parts of the powder and silica fine particles (particle diameter: 12 nm, hydrophobicity: 60)
1.0 part with a Henschel mixer to obtain a color toner.

[0177] <Manufacture of carrier> Styrene / methyl methacrylate =
40 g of 6/4 copolymer fine particles, specific gravity of 5.0, weight average diameter of 45 μm, and 1960 g of Cu—Zn ferrite particles having a saturation magnetization of 25 emu / g when an external magnetic field of 1000 Oe are applied, were mixed with a high-speed stirring mixer. After charging and mixing at a product temperature of 30 ° C. for 15 minutes, the product temperature was set at 105 ° C., and a mechanical impact force was repeatedly applied for 30 minutes, followed by cooling to prepare a carrier.

<Preparation of Developer> The above carrier 418.5
g and 31.5 g of each toner using a V-type mixer.
After mixing for 1 minute, a developer for a live-action test was prepared.

<< Evaluation Apparatus, Conditions >> In the embodiment, Konica 9028 (manufactured by Konica Corporation) was used as an image forming apparatus.
Was used to evaluate the actual photograph.

<< Evaluation Items and Methods >> In the test, a reflection image (image on paper) and a transmission image (OHP image) were respectively formed on paper and OHP by the above-described image forming method using the developer using the color toner of the present invention. It was prepared and evaluated by the following method. The toner adhesion amount is 0.7 ± 0.0
The evaluation was in the range of 5 (mg / cm ² ).

Saturation: Macbeth Color-Ey
Using e7000, the saturation of the created image on paper was measured and compared.

Transparency: The transparency of the OHP image was evaluated by the following method. The visible spectral transmittance of the image was measured using an OHP sheet that does not carry the toner as a reference, using a “330 type self-recording spectrophotometer” manufactured by Hitachi, and the spectral transmittance at 570 nm for yellow, 650 nm for magenta, and 500 nm for cyan was determined. It was a measure of the transparency of the OHP image.

<< Evaluation Results >> The above results are shown in Table 1.

[0184]

[Table 1]

[0185]

The toner of the present invention can obtain a high-density and uniform image, and when printed on a transparent sheet or the like to display an image by transmitting light, a transparent image can be obtained. What you can get.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a non-contact developing system.

FIG. 2 is a schematic view showing an example of a sequential transfer method.

FIG. 3 is a schematic view showing an example of a batch transfer method.

FIG. 4 is a schematic view showing one example of a blade cleaning system.

FIG. 5 is a schematic view showing an example of a blade cleaning system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Photoconductor 2 ... Developer carrier 2A ... Developing sleeve 2B ... Magnet 3 ... Two-component developer (containing toner of this invention) 4 ... Developer layer regulating member 5 ... Developing area 6 ... Developer layer 7 ... Alternating electric field 11 ... Charging device 12 ... Developing unit 13 ... Cleaning unit 14 ... Photoconductor drum 15 ... Transfer drum 16 ... Transport unit 17 ... Adsorption electrode 18 ... Transfer electrode 19 ... Peel electrode 20 ... Removal electrode 21 ... Transport Part 31: Cleaning blade 33: Holder

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshiki Nishimori 1st Sakuracho, Hino-shi, Tokyo Konica Corporation In-house (72) Inventor Mikio Kamiyama 1st Sakuracho, Hino-shi, Tokyo In-house Konica Corporation

Claims (12)

[Claims] 1. An electrostatic latent image developing toner comprising a yellow dye represented by the following general formula (1). Embedded image In the formula, A represents a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl group, B represents a substituted or unsubstituted phenyl, naphthyl, or a heterocyclic group;
NB is of the formula In represented ortho, ortho - dihydroxy - azomethine dye, except containing azomethine dyes serving azomethine dyes developing agent with a silver halide developing substituent in A and / or B section has wrapped a radical, R ¹ is Alkyl, fluoroalkyl, alkoxyalkyl, phenyl, phenylamino or a group having a silver halide developing action, R ² represents alkyl, fluoroalkyl, alkoxyalkyl, phenyl or phenylamino; R ³ represents hydrogen, lower Represents a group also having an alkyl, phenyl or silver halide developing action. 2. An electrostatic latent image developing toner comprising a yellow dye represented by the following general formula (2). Embedded image In the formula, A represents a substituted or unsubstituted phenyl or a substituted or unsubstituted naphthyl group; B represents a substituted or unsubstituted phenyl, naphthyl or heterocyclic group;
= NB is the formula An ortho-, ortho-dihydroxy-azomethine dye represented by the formula (1), provided that the azomethine dye developing agent which is an azomethine dye having a silver halide developable substituent in part A and / or B is included; R ⁴ represents lower alkyl, hydroxyl, hydrogen or a group having a dihydroxyphenyl silver halide developing function, provided that X represents an aromatic group, an aromatic group, or a heterocyclic ring. When R represents a group of atoms necessary to complete a ring, R ⁴ represents a group other than hydroxyl, and at least one of the moieties includes a group having a dihydroxyphenyl silver halide developing action, The dye molecule and / or the ligand moiety bound to the chromium atom by two oxygen atoms contains at least one developing group. 3. An electrostatic latent image developing toner containing a cyan dye represented by the following general formula (3). Embedded image Wherein at least one of the sixteen R ⁵ substituents present on the phthalocyanine ring and no more than four R ⁵ are provided as R ⁶ groups and no more than two per ring on any benzene ring R ⁶ , the remaining R ⁵ substituents are R ⁷ groups, and R ⁶ consists of the group (—A) n—E, A is a divalent organic linking group, n is 1 and E is Is benzene substituted by at least two groups selected from the group consisting of a hydroxyl group and an amino group occupying ortho or para positions with respect to each other so that the exposed silver halide photographic emulsion can be developed; M is a metal selected from the group consisting of cobalt, nickel, copper, chromium, magnesium and zinc, and each R ⁷ is -CH ₃ , -OCH ₃ ,-
_{OC 2 H 5, -SO 3 H} , Cl, made of the same or different member selected from the group consisting of Br and hydrogen. 4. A toner for developing an electrostatic latent image comprising a yellow dye represented by the general formula (1) and having a BET specific surface area of 5 to 100 m ² / g. 5. A toner for developing an electrostatic latent image comprising a yellow dye represented by the general formula (2) and having a BET specific surface area of 5 to 100 m ² / g. 6. An electrostatic latent image developing toner comprising a cyan dye represented by the general formula (3) and having a BET specific surface area of 5 to 100 m ² / g. 7. A developing method comprising an electrostatic latent image toner having a BET specific surface area of 5 to 100 m ² / g containing a yellow dye represented by the general formula (1). Agent. 8. A development comprising an electrostatic latent image toner having a BET specific surface area of 5 to 100 m ² / g containing a yellow dye represented by the general formula (2). Agent. 9. A development comprising a latent electrostatic toner having a BET specific surface area of 5 to 100 m ² / g containing a cyan dye represented by the general formula (3). Agent. 10. A latent image formed on an electrostatic latent image carrier is charged with an electrostatic charge having a BET specific surface area containing a yellow dye represented by the general formula (1) of 5 to 100 m ² / g. An image forming method comprising developing with a latent image toner. 11. A latent image formed on an electrostatic latent image carrier is charged with an electrostatic charge having a BET specific surface area containing a yellow dye represented by formula (2) of 5 to 100 m ² / g. An image forming method comprising developing with a latent image toner. 12. A latent image formed on an electrostatic latent image carrier is charged with an electrostatic charge having a BET specific surface area of 5 to 100 m ² / g containing a cyan dye represented by the general formula (3). An image forming method comprising developing with a latent image toner.