JP2003084487A - Electrostatic charge image developing toner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide toner with which the occurrence of fogging on an image at a copying time is prevented, the occurrence of the filming of a photoreceptor surface is prevented and also the deterioration of the flow property and the electrification property of the toner is not caused. SOLUTION: This electrostatic charge image developing toner is constituted by internally adding inorganic particulate A whose average primary particle size is 0.1-0.5 μm into coloring particles incorporating at least colorant and binding resin and also by externally adding two or more kinds of inorganic particulates B whose average primary particle size is smaller than at least that of the inorganic particulate A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner used for developing an electrostatic charge image formed on a photoreceptor in an image forming apparatus using a dry developer, such as a copying machine and a printer. is there.

[0002]

2. Description of the Related Art Generally, an electrophotographic method based on the Carlson process, an electrostatic recording method, or the like develops an electrostatic latent image formed on a latent image bearing surface made of a photoconductive photoreceptor or a dielectric. There are roughly two ways to do this. One is a two-component developing method in which a mixture of toner and carrier is used to give a desired charge amount to the toner as shown in JP-A-61-147261, and the other is a developing sleeve in which the toner is used alone. This is a one-component developing method in which the toner is charged on the toner supply roller by a blade or the like. It is common to use fine powder in which the toners used in this manner are mainly composed of a resin having synthetic or natural thermoplasticity, and a colorant such as carbon black or other dyes and pigments dispersed and contained therein. However, studies have been made to incorporate various agents in order to stably perform an appropriate electrostatic charge image over a long period of time.

In the so-called two-component development in which a carrier and a toner are mixed and a desired charge amount is applied to the toner for development, the charge amount of the toner and the developer always shows a stable value over the time of use. It is highly desirable in terms of stability and reliability. In particular, the charge amount of a normal toner is balanced by the charging ability of the toner and the ability to retain the generated charge because the toner, which is substantially a dielectric, is charged by friction and contact. Generally, the toner has a change in particle size distribution with the lapse of use, but the fluidity improver also has a similar change. Therefore, it becomes difficult to prevent changes in the charge amount and fluidity after use for a long time.

Further, a method of mixing toner particles and inorganic fine particles such as various metal oxides and the like has been proposed for the purpose of improving the flow characteristics and charging characteristics of the toner, and if necessary, the inorganic particles may be mixed. A method of treating with a specific silane coupling agent, a titanate coupling agent, silicone oil, a fatty acid, etc., a method of coating with a specific resin, etc. have also been proposed for the purpose of modifying the hydrophobicity, charging characteristics, etc. of the surface of fine particles. . Examples of the inorganic fine particles include titanium oxide, silicon oxide, aluminum oxide, zinc oxide, magnesium oxide, cerium oxide, iron oxide, copper oxide, tin oxide and the like.

Further, a toner containing two or more kinds of the inorganic fine particles is already known in order to improve image characteristics, durability and obtain a good image even when stored at high temperature. Further, in JP-A-10-258569, polyethylene wax and polypropylene wax are used in combination, inorganic fine particles A having an average primary particle diameter of 0.03 to 3 μm are internally added, and the average primary particle diameter subjected to hydrophobic treatment is 0. 0.005-
A toner to which inorganic fine particles B of 0.02 μm are externally added has also been proposed.

[0006] These conventional inorganic fine particles are not always sufficiently satisfactory in the performance of imparting fluidity to the toner depending on the particle size distribution. Even when the performance of a toner made from conventional fine particles is evaluated with a copying machine equipped with an organic photoconductor photoreceptor, inorganic fine particles are detached from the toner mother particles, damaging the photoreceptor and causing image defects. In contrast to this, there were cases where the photoconductor did not have any scratches and there was no problem on the image at all. In addition, the toner mother particles after desorption have remarkably deteriorated charging performance, or retain the charging in the opposite direction,
Fogging is extremely increased on the image. In addition, the image density decreases.

The desorbed inorganic fine particles adhere to the photoconductor to cause filming. Further, since the toner mother particles from which the inorganic fine particles have been desorbed have a drastically reduced flowability, there arise problems that the toner mother particles are scattered in the copying machine and the toner consumption becomes unstable. Further, in the melt-kneading step during manufacturing, for example, when the material is charged into the twin-screw continuous extruder, the material prepared in the dispersion-mixing step of the mixer as the previous step flows into the melt-kneading machine with sufficient uniformity. There were cases where it was not done. As a result, the constituent materials were not dispersed with sufficient uniformity. If the dispersion state of each constituent material does not have good uniformity, fluidity and chargeability are not sufficient, and fogging occurs on the image when the performance is evaluated by a copying machine, and the image density decreases, Problems such as poor tonality occur. In addition, problems such as scattering in the copying machine and filming on the photoconductor occur.

[0008]

Therefore, as the toner for developing an electrostatic charge image, firstly, there is no fog, and there is no streak.
Secondly, even when toner is continuously copied and printed, there is no image defect such as chipping and filming, and a high image and high quality copy having good image density and excellent gradation can be obtained. Thirdly, toner with excellent durability, such as stable image and image quality, less scattering in the machine, and stable toner consumption,
Even when stored for a long time at a high temperature, the toner can be stably supplied without being solidified, and the toner having a good image density is fourthly mixed in the melt kneading step in the manufacturing process. There is a strong demand for the development of a toner that uniformly and smoothly flows into the melt-kneader. From this situation, an object of the present invention is to eliminate fog on an image during copying,
It is an object of the present invention to provide a toner capable of preventing filming on the surface of a photoconductor and further not causing deterioration of fluidity and chargeability even when stored at a high temperature for a long time.

[0009]

Means for Solving the Problems As a result of investigations to solve the above problems, the inventors of the present invention conducted a dry laser diffraction particle size distribution measurement on inorganic fine particles and found that the particle size distributions were different. It was found that one of the causes that the difference in specific surface area by the BET method affects the toner performance is that the inorganic primary particles having an average primary particle diameter within a specific small particle range are internally added, Moreover, the present invention has reached the point of adding two or more kinds of external additives.
That is, the gist of the present invention is: (1) Inorganic fine particles A having an average primary particle diameter of 0.1 to 0.5 μm are internally added to colored particles containing at least a colorant and a binder resin, and at least 2 A toner for developing an electrostatic charge image is characterized in that one or more kinds of inorganic fine particles are externally added.

(2) The inorganic fine particles A internally added and the two or more inorganic fine particles externally added are at least one inorganic metal selected from the group consisting of silicon, titanium, aluminum, magnesium, barium and zinc. The toner for developing an electrostatic charge image according to (1) is selected from inorganic fine particles which are oxides. (3) The electrostatic charge image developing toner according to (1) or (2), wherein the surface of the inorganic fine particles A internally added is treated with a silane coupling agent, a silicone oil, or a titanate coupling agent. (4) Inorganic fine particles A of the same kind as those internally added,
The toner for developing an electrostatic charge image according to any one of (1) to (3), which is externally added as one kind of two or more kinds of inorganic fine particles to be externally added.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. As the binder resin of the toner used in the present invention, acrylic resins such as polystyrene, homopolymerization of styrene such as polyvinyltoluene and its substitution products, styrene-p-chlorostyrene copolymer, styrene-propylene copolymer are used. , Styrene-vinyltoluene copolymer, styrene-methyl acrylate copolymer, styrene-ethyl acrylate copolymer, styrene-butyl acrylate copolymer, styrene-methyl methacrylate copolymer, styrene-acrylic acid Ethyl copolymer, styrene-butyl acrylate copolymerization suspension, styrene-α-chloromethacrylate methyl copolymerization suspension, styrene-acrylonitrile copolymer, styrene-vinyl methyl ether copolymer, styrene-vinyl methyl ketone copolymerization Polymer, styrene-butadiene copolymer, styrene-isoprene Co-base, styrene copolymer such as styrene-maleic acid ester copolymer, polymethylmethacrylate, polybutylmethacrylate, polyvinyl chloride, polyvinylacetate, polyethylene, polypropylene, polyester, polyurethane, epoxy resin, polyvinyl butyral , Polyacrylic acid resin, rosin, modified rosin, terpene resin, phenol resin, aliphatic or aliphatic hydrocarbon resin, aromatic petroleum resin, chlorinated paraffin, paraffin wax and the like can be used alone or in combination.

Of these, a particularly preferable binder resin is styrene-acrylic copolymerization suspension such as styrene-alkyl (meth) acrylate copolymerization suspension, or polyester. Here, the polyester is obtained by a polycondensation reaction of an alcohol and an acid. For example, as the alcohol, polyethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol,
1,4-propylene glycol, neopentyl glycol, diols such as 1,4-butenediol, 1.4-
Etherified bisphenols such as bis (hydroxymethyl) cyclohexane, bisphenol A, hydrogenated bisphenol A, polyoxyethylenated bisphenol A, polyoxypreprenylated bisphenol A, etc., which are saturated or unsaturated with 3 to 22 carbon atoms A divalent alcohol unit substituted with a hydrocarbon group, sorbitol,
1,2,3,6-hexanetetrol, 1,4-sorbitan, pentaerythritol, dipentaerythritol, tripentaerythritol, sucrose, 1,2,4-butanetriol, 1,2,5-pentanetriol, glycerol , 2-methylpropanetriol, 2-methyl-1,2,4-butanetriol, trimethylolethane, trimethylolpropane, 1,3,5-trihydroxymethylbenzene and other trihydric or higher alcohol monomers. be able to.

Examples of the carboxylic acid used to obtain the polyester include monocarboxylic acids such as palmitic acid, stearic acid and oleic acid, maleic acid, fumaric acid, mesaconic acid, citraconic acid, terephthalic acid,
Cyclohexanedicarboxylic acid, succinic acid, adipic acid,
Sebacic acid, malonic acid, divalent organic acid monomers obtained by substituting these with a saturated or unsaturated hydrocarbon group having 3 to 22 carbon atoms, anhydrides of these acids, dialkyls from lower alkyl esters and linoleic acid. Polymer, 1,2,4-benzenetricarboxylic acid, 1,2,5-benzenetricarboxylic acid, 2,
5,7-naphthalene tricarboxylic acid, 1,2,4-naphthalene tricarboxylic acid, 1,2,4-butane tricarboxylic acid, 1,2,5-hexane tricarboxylic acid, 1,3-
Examples thereof include tricarboxylic or higher polyvalent carboxylic acid monomers such as dicarboxyl-2-methyl-2-methylenecarboxypropane, tetra (methylenecarboxyl) methane, and anhydrides of these acids. Further, the above resins are not limited to being used alone, but two or more kinds may be used in combination.

The colorants used in the present invention include carbon black, lamp black, iron black, ultramarine blue, nigrosine dye, aniline blue, phthalocyanine blue, Hansa yellow G, rhodamine 6G, lake, chalco oil blue, colum yellow, Quinacridone, benzidine yellow, rose bengal, triallylmethane dyes, monoazo dyes, disazo dyes and pigments may be used alone or in combination. The addition amount of these colorants is not particularly limited, but is usually the binder resin 1 in the toner.
1 to 20 parts by weight, preferably 3 to 1 with respect to 00 parts by weight
Adjust to 5 parts by weight.

There is no inconvenience even if the toner contains a drug to be contained for the purpose of controlling the triboelectric charging property, as in the case of a commonly used toner. Examples of such so-called polarity control agents include metal complex salts of monoazo dyes, nitrohumic acid, and salts thereof, salicylic acid, naphthoic acid, dicarboxylic acid metal complex amino compounds such as Co, Cr, and Fe, quaternary ammonium compounds, and organic compounds. There are dyes. The addition amount of these is not particularly limited, but is preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the binder resin in the toner.

Further, the toner of the present invention may optionally contain
A releasing agent such as a general-purpose wax may be added. As such a release agent, low-molecular-weight polypropylene, which is a general-purpose wax, or a release agent may be added. As the release agent used in the present invention, a general-purpose low molecular weight polypropylene,
Low molecular weight polyurethane, carnauba wax, microcristan wax, jojoba wax, rice wax,
The montanic acid wax and the like can be used alone or in combination, but are not limited thereto. Further, the addition amount of these is not particularly limited as long as it is within a normal range of use.

The inorganic fine particles A added internally or the inorganic fine particles externally added used in the toner of the present invention include:
One or more metal oxides selected from the group consisting of titanium, aluminum, silicon, magnesium, barium and zinc prepared by a known wet method or dry method can be used, and preferably titanium, aluminum or silicon is oxidized. Inorganic fine particles are preferred. More preferably, it is a silicon oxide.

Inorganic fine particles A internally added to the toner of the present invention
As the material, those having an average primary particle diameter in the range of 0.1 to 0.5 μm are used. If the average primary particle size is smaller than 0.1 μm, it is not preferable because there is no filming suppressing effect.
On the other hand, if it is larger than 0.5 μm, the amount of charge is reduced and the film thickness of the drum is worn, which is not preferable. In internally adding such inorganic fine particles A, if the addition amount is small, there is no filming suppressing effect, and if the addition amount is large, the chargeability of the toner is lowered. Therefore, the addition amount of the inorganic fine particles A to the toner is 0.1 to 5.0% by weight, preferably 0.3 to 3.0% by weight.

Further, it is important to externally add two or more kinds of inorganic fine particles to the toner of the present invention in order to improve the fluidity of the toner and the environmental stability. The inorganic fine particles to be externally added may partially include the same inorganic fine particles A as internally added, but at least two kinds of inorganic fine particles different from the inorganic fine particles A internally added are preferable. If only one type of inorganic fine particles is externally added, the fluidity is poor,
Alternatively, it is not preferable because it has no effect of preventing filming.

The inorganic fine particles to be externally added have an average primary particle diameter smaller than that of the inorganic fine particles A, preferably 0.01 to 0.1 μm. When the average primary particle diameter is smaller than 0.01 μm, the inorganic fine particles are naturally aggregated, and it is difficult to uniformly adhere to the surface of the toner, and the charge amount becomes unstable. On the other hand, if it is larger than 0.1 μm, the fluidity is not sufficiently imparted. When such inorganic fine particles are externally added, if the addition amount is small, sufficient flowability cannot be imparted. On the other hand, when the addition amount is large, the toner charge amount tends to increase and the image density decreases. Further, when the external additive is detached from the toner, a toner having an opposite charge is produced and fog is generated on the image. For this,
The external addition amount of the inorganic fine particles to the toner is 0.05
-2.0% by weight, preferably 0.1-1.0% by weight.

In the present invention, the internal addition means to be present in the toner particles, and specifically means to be added in the toner particle manufacturing process. The external addition means that the toner particles are present on the surface of the toner particles, and specifically means that the toner particles are once adjusted and then added to be attached to the surface. In addition, in order to reduce the chargeability of the toner by adding the inorganic fine particles added internally or externally and to improve the fluidity and environmental stability of the developer, the surface of these inorganic fine particles is controlled, and the surface is made hydrophobic. For the purpose, the surface may be treated with a known treatment agent such as a silane coupling agent or silicone oil.

Specific examples of such silane coupling agents include organoalkoxysilanes (methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxytrimethylsilane, ethoxytrimethylsilane, etc.), organochlorosilanes (trichloromethylsilane, dichloromethylsilane, Chloromethylsilane, trichloroethylsilane, dichlorodiethylsilane, chlorotriethylsilane, trichlorophenylsilane, etc.), organosilazanes (triethylsilazane, tripropylsilazane, triphenylsilazane, triphenylsilazane, hexamethyldisilazane, hexaethyldisilazane) , Hexaphenyldisilazane, etc.), organodisilazane, organosilane, etc., which are used alone or as a mixture of two or more kinds. . The silane coupling agent is preferably organochlorosilane or organosilazane.

Specific examples of the silicone oil include dimethyl silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil, methylphenyl silicone oil, fluorosilicone oil,
Modified silicone oils and the like are known, and these are used in one kind or in a mixture of two or more kinds, and the silicone oil may be cured by a crosslinking agent or heat treatment, if necessary.

To surface-treat the inorganic fine particles with the above-mentioned surface treatment agent, for example, the surface treatment agent is diluted with a solvent, the diluent is added to the inorganic fine particles and mixed, and the mixture is heated and dried and then crushed. Can be carried out by a dry method in which inorganic / inorganic fine particles are dispersed in an aqueous system to form a slurry, a surface treatment agent is added and mixed, and the mixture is heated and dried and then crushed. In particular, a silane coupling agent or silicone oil is preferable as the surface treatment agent for the inorganic fine particles, and the effect is that it imparts a hydrophobic function to improve the environmental dependence and is excellent in improving the toner flow performance function.

The proportion of the toner of the present invention in the whole toner is not particularly limited, but the binder resin is 40 to 95% by weight, the colorant is 2 to 60% by weight, and the amount of the inorganic fine particles internally added is 0.01. ~ 5.0 wt%, the inorganic fine particles added externally,
0.05 to 2.0% by weight, and other components such as a release agent and a charge control agent are preferably 0 to 10% by weight.

The method for producing the toner particles of the present invention includes:
Various toner manufacturing methods that have been conventionally used can be applied. For example, as a general example, first, a binder resin, a colorant, a release agent, a charge control agent, and the inorganic fine particles A of the present invention are uniformly dispersed and mixed by a known mixer, and then the mixture is sealed. Melt kneading with a kneader or a uniaxial or biaxial continuous extruder, and after cooling, pulverization and classification. The average particle size of the classified toner is preferably 5 to 20 μm. Further, in order to externally add an external additive such as inorganic fine particles to the toner, the classified toner and the external additive may be stirred and mixed with a high-speed stirrer such as a Henschel mixer or a super mixer.

In the toner of the present invention, when inorganic fine particles are internally added to the toner, it may be subjected to kneading by kneading, cooling, pulverizing and classifying, and mixing conditions such as mixing speed at mixing, mixing time, and blade shape are other. The conditions may be appropriately determined so that the mixed state with the materials becomes uniform. Further, regarding the melt-kneading and cooling, the conditions in which the materials are dispersed uniformly, including other materials, and the kneaded material dispersed in a suitable state is cooled in a state in which the state is maintained are appropriately set. Just decide. With regard to pulverization, classification, and external addition, there is no problem in a known conventional method.

When the inorganic fine powder is externally added to the toner of the present invention, for example, the inorganic fine powder may be added to the toner and mixed and stirred, and the mixing conditions such as the number of revolutions of stirring, time, and blade shape. May be appropriately determined according to the toner performance. The crushing treatment of the inorganic fine powder may be performed in advance before it is used in the external addition step. It is more preferable that the time after the crushing process is performed until the external addition step is constant. The toner of the present invention thus obtained can be used as a magnetic toner for a one-component developer that does not use a carrier or a non-magnetic toner. It can also be used as a two-component developer toner by mixing it with carrier powder.

As the carrier which can be used in the present invention, all known carriers can be used, and examples thereof include iron powder, ferrite powder, nickel powder, magnetic powder such as magnetic resin carrier, glass beads and the like. Those whose surface is treated with a resin or the like (for example, those coated with a silicone resin, an acrylic resin, a styrene resin, a fluororesin) and the like can be mentioned. Moreover, what mixed these and processed the surface as a coating material can be used conveniently. As a method of forming these resin layers,
It can be applied to the surface of the carrier core particles by a method such as a spraying method, an infiltration method, a heat treatment method or the like. The two-component starting developer can be prepared by mixing and stirring the toner obtained in the above steps and the carrier with a Nauta mixer, a V-type mixer or the like.

[0030]

EXAMPLES Examples of the present invention will be described below. The present invention is not limited to the following examples unless it exceeds the gist. Moreover, "part" in an Example means a "weight part."

Example 1 A constituent material having the following proportions was prepared. -Styrene / n-butyl acrylate copolymer 100 parts-Colorant carbon black MOGUL-L (manufactured by CABOT Co.) 6 parts-Charge control agent Spiron Black TRH 1 part-Polypropylene Wack 550P (manufactured by Sanyo Chemical Co., Ltd.) 1 Parts Inorganic fine particles A1: Silica (BET: 3 m ² / g, average primary particle diameter 0.5 μm) (VP-NX10: Nippon Aerosil Co., Ltd.) 0.5 parts Inorganic fine particles A1 0.5 parts by weight Were mixed, melt-kneaded, pulverized and classified to obtain black toner particles having an average particle diameter of 10 μm. The obtained toner particles were treated with a surface treatment agent consisting of hexamethylene disilazane (HMDS) as an external additive, which was measured by dry laser diffraction particle size distribution measurement and shown in Table 1 below. 0.3 parts by weight of the same as the added inorganic fine particles A1, silica B
Of 0.3 parts by weight and silica C of 0.5 parts by weight are added,
180 at 2970 rpm using a Henschel mixer
The toner was obtained by performing a mixing and adding treatment for sec.

[0032]

[Table 1]

Examples 2 to 4 Toners were prepared by changing the respective external additives shown in Table 1 and adding them to the black toner particles having the same average particle diameter of 10 μm as obtained in Example 1. However, the type of the inorganic fine particles as the external additive (the same as the internally added A) and the breakdown of the added amount are as shown in Table 2.

Comparative Examples 1 to 3 Black toner particles having the same average particle diameter of 10 μm as obtained in Example 1 were added to the inorganic fine particles A among the constituent materials shown in the examples.
Was not added, and a toner was prepared in the same manner as in Example 1. However, as the surfaces of the inorganic fine particles A internally added in Comparative Example 2 and the silica B used as an external additive in Comparative Example 3, those not subjected to the HMDS treatment in Table 1 were used.

Comparative Examples 4 to 7 The primary particle diameter of the inorganic fine particles A internally added is 0.5 μm or more (500 nm or more), or 0.1 μm or less (100 nm).
The toner was prepared in the same manner as in Example 1 except that A1 and A2 described below were used. Further, as Comparative Examples 6 and 7, toners were prepared in the same manner as in Example 1 except that only one of the external additives, silica B or C, in Example 4 was used.

A carrier was mixed with the toner obtained in each of Examples 1 to 4 and Comparative Examples 1 to 7 to obtain a developer. Here, the carrier is spherical ferrite particles (average particle size: 70 μm).
m) is a resin-coated carrier obtained by coating styrene-acrylic resin. Table 2 summarizes the results of evaluation tests conducted on the following items for the developer mixed with the carrier and the toner at the weight mixing ratio (carrier: toner = 96: 4).

(1) Using a fog copying machine (AR-505; manufactured by SHARP),
After continuously copying 10,000 sheets using an original having a black ratio of 6%, the formed images were visually ranked according to the following criteria, as follows. ⊚: When no fogging is observed. ○: When fogging is hardly recognized. Δ: When fogging was slightly observed but there was no problem in practical use. X: When there was a lot of fogging.

(2) In the same manner as in the filming (1), after continuously copying 10,000 sheets, a halftone image was output and the surface of the photoconductor was observed.
The following ranking was performed. ◯: Image is not disturbed, and toner component does not adhere to the light-sensitive period. Δ: Some fog is observed on a part of the surface of the photoconductor,
There is no problem on the image. X: The surface of the photoconductor is fogged and the image is distorted.

(3) Fluidity The apparent specific gravities of the toners of the prepared Examples and Comparative Examples were measured with a powder tester (manufactured by Hosokawa Micron Co., Ltd.) and ranked as follows. ◯: When the apparent specific gravity is 0.360 (g / cm ³ ) or more. B: When 0.340 or more and less than 0.360. X: When less than 0.340.

[0040]

[Table 2]

[0041]

According to the present invention, fogging on an image during copying can be prevented and filming on the surface of the photoconductor can be prevented. Further, it is possible to provide a toner that does not cause deterioration of the fluidity and the chargeability of the toner.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuaki Sumida             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company (72) Inventor Toshihiko Murakami             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company (72) Inventor Kazuru Matsumoto             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company (72) Inventor Eiji Tenjiku             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company F term (reference) 2H005 AA06 AA08 CA12 CA25 CA26                       CB07 CB13 EA05

Claims (5)

[Claims] 1. Inorganic fine particles A having an average primary particle diameter of 0.1 to 0.5 μm are internally added to colored particles containing at least a colorant and a binder resin, and at least two or more kinds of inorganic fine particles are externally added. An electrostatic charge image developing toner characterized by being added. 2. The inorganic fine particles A internally added and the two or more inorganic fine particles externally added are one or more metal oxides selected from the group consisting of silicon, titanium, aluminum, magnesium, barium and zinc. The toner for developing an electrostatic charge image according to claim 1, which is 3. The toner for developing an electrostatic charge image according to claim 1, wherein the surface of the inorganic fine particles A added internally is treated with a silane coupling agent, a silicone oil, and a titanate coupling agent. 4. The toner for developing an electrostatic charge image according to claim 1, wherein the surface of the externally added inorganic fine particles is treated with a silane coupling agent, a silicone oil, and a titanate coupling agent. 5. The inorganic fine particles A of the same type as those internally added are externally added as one kind of the two or more kinds of externally added inorganic fine particles. Item 6. The toner for developing an electrostatic charge image according to item.