JPH0719075B2 - Toner for developing electrostatic image and method for producing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a toner having excellent physical and chemical properties for developing an electrostatic image in electrophotography, electrostatic recording, electrostatic printing and the like. Regarding

[Prior art]

Conventionally, as the electrophotographic method, as described in U.S. Pat.No. 2,297,691 specification, Japanese Patent Publication No. 42-23910 and Japanese Patent Publication No. 43-24748, a number of methods are known.
Generally, a photoconductive substance is used to form an electric latent image on a photoconductor by various means, and then the latent image is developed with a toner, and a toner image is formed on a transfer material such as paper, if necessary. After transfer, the image is fixed by heating, pressure or solvent vapor to obtain a copy.

Various methods and devices have been developed for the final step of fixing the toner image on a sheet such as paper. The most popular method at present is a pressure heating method using a heating roller.

And the pressure heating method by such heating roller is
Fixing is performed by passing the toner image surface of the sheet to be fixed under pressure while contacting the surface of a heat roller whose surface is formed of a material having releasability for toner. Since the toner image on the sheet to be fixed and the toner image on the sheet to be fixed come into contact with each other under pressure, the thermal efficiency at the time of fusing the toner image on the sheet to be fixed is extremely good, and rapid fixing can be performed, and high-speed electrophotographic copying is possible. Very effective in the machine.

However, in the pressure heating method using a heat roller, the heat roller surface and the toner image are in contact with each other under pressure in a molten state, so that a part of the toner image adheres to and transfers to the surface of the fixing roller, so that the next sheet to be fixed. There is a problem that this re-transfers to cause a so-called offset phenomenon and stains the fixing target sheet.

In any case, preventing the toner from adhering to the surface of the heat roller is required as one of the essential conditions in the heat roller fixing method.

As means for satisfying this requirement, conventionally, for example, the roller surface is formed of a material having excellent releasability from toner, such as silicon rubber or fluorine resin, and further, the offset is prevented and the roller surface is prevented from fatigue. For this purpose, the surface of the roller is coated with a thin film of a liquid having a good releasing property such as silicone oil.

However, this method is extremely effective in preventing toner offset, but has a problem that the fixing device becomes complicated because an apparatus for supplying an offset preventing liquid is required. .

For these reasons, the direction of preventing the offset by supplying the offset preventing liquid is not preferable, and in fact, the development of a toner having a low fixing point and a wide fixing temperature region and high offset resistance is desired. Is.

In order to provide such a toner, a method has been proposed in which a small amount of wax such as low molecular weight polypropylene and polyethylene that melts sufficiently during heating is added in a small amount from the viewpoint of increasing the peelability of the toner. Although the toner produced by this method is effective in preventing offset, it has a problem that it has high cohesiveness, unstable charging characteristics, and low durability, and is sufficiently satisfactory. is not. Also,
As a method of adding wax such as low molecular weight polypropylene and polyethylene as described above, other than those,
There is also a method of kneading while heating and melting together with a binder resin, a colorant, a charge control agent, and a magnetic material if necessary,
In this method, not only the binder resin but also the colorant, the charge control agent, the magnetic substance and the like are not sufficiently dispersed by kneading the above-mentioned low-molecular-weight polypropylene, polyethylene and other waxes. And, since the wax is not compatible with the binder resin, the obtained toner cannot be the one in which the above-mentioned low molecular weight polypropylene, polyethylene, etc. are evenly dispersed. After all, the toner provided by this method is also not completely satisfactory.

[Object of the Invention]

An object of the present invention is to provide a toner having excellent physical and chemical properties for developing an electrostatic charge image, which solves the above-mentioned problems.

Another object of the present invention is to provide a toner for fixing on a heat roller, which has good fixability and particularly good offset resistance.

Still another object of the present invention is to provide a toner for fixing on a heat roller, which has excellent chargeability and brings about high image density.

Another object of the present invention is to have a uniform and stable chargeability,
An object of the present invention is to provide a toner for fixing on a heat roller, which gives a clear and fog-free image.

Still another object of the present invention is to provide a toner for fixing on a heat roller which gives a stable and high quality image even in a high humidity environment.

[Structure of Invention]

The present inventors have obtained the following knowledge in the process of solving various problems of the above-described conventional toner and making intensive research to develop a toner that meets the above-described object of the present invention.

That is, in general, when a polyester is prepared by polymerizing a dicarboxylic acid and a diol at a high temperature, a wax such as a low molecular weight polypropylene or polyethylene is added to the polyethylene, so that polyethylene can be added between polymer substances formed by the polymerization. Wax such as polypropylene is gradually dispersed,
As a result, the polyester produced by polymerization is a wax in which the wax is uniformly dispersed, but the toner produced using this wax has insufficient charging characteristics and is unstable, and is specifically obtained. It can be seen that the copy image has a low density, which is further promoted especially in a high humidity environment, and that fog is likely to occur,
As a result of research on this cause, it was found that the wax component hinders the triboelectrification property of the polyester on the toner surface by uniformly dispersing the polyester and the wax of low-molecular-weight polyethylene or polypropylene. For this reason, a charge control agent is generally added to the toner.However, due to the difference in polarity between the polyester, which is a component of the toner, and the wax of low-molecular-weight polyethylene or polypropylene, the charge control agent for both is different. It has been found that the diffusion rate is remarkably different, the chargeability of the toner surface is non-uniform, and it becomes unstable, which causes such a problem. Based on this finding, the present inventors further studied and found that when polymerizing a polyester from a diol, a carboxylic acid or the like, a wax such as low molecular weight polyethylene or polypropylene in which a charge control agent was previously dispersed was coexisted. When polymerization is carried out and a toner is produced using the obtained polymer, the compatibility with the originally poor polyester is remarkably improved and also increased, and the wax component and the polyester are sufficiently dispersed. Since the wack component contains the charge control agent in advance, it does not hinder the triboelectric charging on the toner surface. Therefore, the toner thus obtained has an extremely uniform and extremely stable charging property and also has an anti-offset property. It turned out to be excellent. Further, as described in Examples described later, a polymer or copolymer obtained by polymerization in the presence of a wax component containing a charge control agent in advance, and a toner constituent material containing a further charge control agent. When the toner is manufactured through the heating and kneading step, the wax component contains the charge control agent in advance, and the polymer or copolymer has the charge control agent dispersed by the heating and kneading. It is particularly preferable because the charge control agent is well dispersed in the component and the polymer or copolymer.

The present invention has been completed based on this finding. That is, the present invention is a styrene homopolymer obtained by polymerization in the presence of a wax component containing a charge control agent in advance, a styrene copolymer, polymethyl methacrylate, polybutyl methacrylate, polyvinyl acetate, polyester, Contains a polymer or copolymer selected from the group consisting of polyamide, epoxy resin, polyvinyl butyral, polyacrylic acid, phenol resin, aliphatic hydrocarbon resin, alicyclic hydrocarbon resin, petroleum resin and chlorinated paraffin. The present invention relates to a toner for developing an electrostatic charge image.

Furthermore, the present invention is a styrene homopolymer or styrene copolymer obtained by polymerizing a polymer-forming monomer or a copolymer-forming monomer in the presence of a wax component containing a charge control agent in advance. Coalesce, polymethylmethacrylate, polybutylmethacrylate, polyvinylacetate, polyester, polyamide, epoxy resin, polyvinylbutyral, polyacrylic acid, phenol resin, aliphatic hydrocarbon resin, alicyclic hydrocarbon resin, petroleum resin and chlorinated paraffin The present invention relates to a method for producing a toner for developing an electrostatic charge image, which contains a polymer or a copolymer selected from the group consisting of as a binder resin. In the present invention, the polymer constituting the toner is specifically styrene such as polystyrene, poly-p-chlorostyrene, polyvinyltoluene, styrene-p-chlorostyrene copolymer, styrene-vinyltoluene copolymer, or a substitute thereof. Homopolymers and copolymers thereof; styrene-methyl acrylate copolymers, styrene-
Ethyl acrylate copolymer, styrene-acrylic acid n-
Copolymers of styrene and acrylic ester such as butyl copolymer; styrene and methacryl such as styrene-methyl methacrylate copolymer, styrene-ethyl methacrylate copolymer, styrene-n-butyl methacrylate copolymer Copolymer with acid ester; Multi-component copolymer of styrene with acrylic acid ester and methacrylic acid ester; Others styrene-acrylonitrile copolymer, styrene-vinyl methyl ether copolymer, styrene-butadiene copolymer, styrene- Vinyl methyl ketone copolymer, styrene-acrylonitrile-indene copolymer, styrene-
Styrene-based copolymers such as copolymers of styrene and other vinyl-based monomers such as maleic acid ester copolymers, polymethylmethacrylate, polybutylmethacrylate,
Polyvinyl acetate, polyester, polyamide, epoxy resin, polyvinyl butyral, polyacrylic acid, phenol resin, aliphatic or alicyclic hydrocarbon resin, petroleum resin,
Chlorinated paraffin, etc.
Also, these can be used in appropriate combination,
Among these, preferred are polyester and styrene type copolymers. In the present invention, the above-mentioned polymer or copolymer is obtained by polymerization in the presence of a wax component containing a charge control agent in advance, as described above. Among the above-mentioned polymers or copolymers, pentaerythritol, sorbitol, glycerol, 1,2,4-butanetriol, 1,2,5 are used as polyols for forming polyester.
-Pentanetriol, 2-methylpropanetriol,
1,3,5-trihydroxymethylbenzene, 1,23,6-hexanetetrol, 1,4-sorbitan, glucose, lactose, sucrose, polyoxyethylene (10) sorbitol,
About 3 to 9 hydroxyl groups such as polyoxyethylene (4) 1,4-sorbitan, polyoxyethylene (30) pentaerythritol, polyoxypropylene (5) 1,2,3,5,6-hexanehentol There are compounds containing
Alkoxylated polyols are particularly preferred.

Similarly, as the polycarboxylic acid, 1,2,5-hexanetricarboxylic acid, 1,2,4-butanetricarboxylic acid, tetra (methylenecarboxyl) methane, 1,2,7,8-octanetetracarboxylic acid, 1, 2,4-benzenetricarboxylic acid, 1,2,5-benzenetricarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, 1,2,4-naphthalenetricarboxylic acid, etc.
There are compounds with ~ 8 carboxyl groups. Also,
Similarly, as the diol, ethylene glycol, propylene glycol, tetramethylene glycol, 1,4-butylene diol, pentamethylene glycol, diethylene glycol, p-di (hydroxymethyl) benzene, 2,2-
Bis (4-hydroxyphenyl) propane, bis (4-
Hydroxyphenyl) methane, bis (4-hydroxyphenyl) ketone, bis (4-hydroxyphenyl) ether, bis (hydroxyphenyl) sulfone, 2,2-bis (2,3,5,6-tetrabromo- 4-hydroxyphenyl)
Although there are butane, etherified bisphenol and the like, bisphenol is preferable, and etherified bisphenol is particularly preferable.

Further, similarly, examples of the dicarboxylic acid include fumaric acid, maleic acid, succinic acid, itaconic acid, phthalic acid, malonic acid, cyclohexanedicarboxylic acid and the like. Of these, fumaric acid and maleic acid are preferable. The carboxylic acid may be in the form of acid anhydride, acid ester, acid chloride or the like.

The polyester produced from these compounds can be produced by a known method, and specifically, for example, the ratio of the number of carboxyl groups of carboxylic acid to the number of hydroxyl groups of hydroxy compound is about 0.8 to 1.2. It can be obtained by mixing the above-mentioned carboxylic acid and the hydroxy compound in a ratio and conducting polycondensation by a known method. In this case, the polyol and the polycarboxylic acid are 0.1 to 20 mol% based on the total amount of the carboxylic acid and the hydroxy compound used.
Is preferred.

The above polyester has a softening point of 90 to 180 by the ring and ball method.
℃, preferably 110 ~ 160 ℃, particularly preferably 125 ~ 150 ℃
Is desirable.

In the present invention, the vulcanizable polyester is preferably contained in the binder resin in a proportion of at least 50% by weight, more preferably 70% by weight or more.

In the present invention, examples of the monomer used for producing the styrene-based copolymer include a styrene-based monomer and a monomer copolymerized with styrene. Specific examples of the styrene-based monomer include styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene,
p-methoxystyrene, p-phenylstyrene, p-chlorostyrene, 3,4-dichlorostyrene, p-ethylstyrene, 2,4-dimethylstyrene, pn-butylstyrene, p-tert-butylstyrene, Examples thereof include styrene such as pn-hexylstyrene, pn-octylstyrene, pn-nonylstyrene, pn-decylstyrene and pn-dodecylstyrene, and derivatives thereof. Specific examples of the monomer copolymerized with styrene include ethylene unsaturated monoolefins such as ethylene, propylene, butylene and isobutylene; vinyl halides such as vinyl chloride, vinylidene chloride, vinyl bromide and vinyl fluoride; Vinyl acetate, vinyl propionate,
Vinyl esters such as vinyl benzoate; methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-octyl methacrylate, dodecyl methacrylate, 2-ethylhexyl methacrylate, stearyl methacrylate. Α-methylene aliphatic monocarboxylic acid esters such as phenyl methacrylate, dimethylaminoethyl methacrylate and diethylaminoethyl methacrylate; methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, propyl acrylate, Acrylic acid esters such as n-octyl acrylate, dodecyl acrylate, 2-ethylhexyl acrylate, stearyl acrylate, 2-chloroethyl acrylate, phenyl acrylate; Methyl ether, vinyl ethyl ether, vinyl ethers such as vinyl isobutyl ether; vinyl methyl ketone, vinyl hexyl ketone, vinyl ketones such as methyl isopropenyl ketone; N- vinyl pyrrole, N- vinyl carbazole, N-
N-vinyl compounds such as vinylindole and N-vinylpyrrolidone; vinylnaphthalenes; acrylonitrile,
Mention may be made of acrylic acid or methacrylic acid derivatives such as methacrylonitrile and acrylamide.

For producing the above-mentioned polymer in the present invention, a cross-linking agent may be used to form the cross-linked polymer, and a general cross-linking agent may be appropriately used as the cross-linking agent in that case. And the like, divinylbenzene, divinylnaphthalene, divinyl ether, divinyl sulfone, diethylene glycol dimethacrylate,
Triethylene glycol dimethacrylate, ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, 1,3-butylene glycol dimethacrylate, 1,6-hexane glycol dimethacrylate, neopentyl glycol dimethacrylate, Dipropylene glycol dimethacrylate, polypropylene glycol dimethacrylate, 2,
2'-bis (4-methacryloxydiethoxyphenyl)
Propane, 2,2'-bis (4-acryloxydiethoxyphenyl) propane, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, tetramethylolmethane tetraacrylate, dibromoneopentyl glycol dimethacrylate, allyl phthalate, 1 Examples thereof include 2,2-propylene glycol and 1,3-butanediol.

By the way, these crosslinking agents become insoluble when used in a large amount, resulting in poor fixability. If the amount used is small, properties such as blocking resistance and durability required as a toner deteriorate, and during heat roll fixing, part of the toner adheres to the roller surface without completely sticking to the paper, It becomes difficult to prevent the offset phenomenon of transfer. Therefore, the amount of these crosslinking agents used is 0.001 to 15% by weight (more preferably
0.1-10% by weight) is recommended.

Examples of the wax component used in the present invention include low molecular weight polyalkanes, natural waxes such as carnauba wax, and appropriately modified products thereof, which have a weight average molecular weight of 10 ² to 10 ⁵ , preferably 10 ^2-1
0 A ^4, preferably has melt viscosity at 140 ° C. is 10 to 10 ³ cps..

The amount of the above wax component contained in the above-mentioned polymer is 0.1 to 30% by weight, more preferably 0.5 to 15% by weight, based on the polymer. At this time, if the content is 0.1% by weight or less, the releasability from the photosensitive drum is poor, and toner fusion to the drum is likely to occur. On the other hand, when the content is 20% by weight or more, the releasability is satisfied, but the density is lowered when copying a large number of sheets, and there is a problem in durability.

Examples of the charge control agent usable in the toner of the present invention include organic salts or complexes containing a metal having a valence of 2 or more. Effective metal species include Al, Ba, Ca, Cd, Co, Cr,
Examples include polyvalent compounds such as Cu, Fe, Hg, Mg, Mn, Ni, Pb, Sn, Sr, and Zn. As the organometallic compound, carboxylate salts, alkoxylates, organometallic complexes and chelate compounds of the above metals are effective, and examples thereof include zinc acetate, magnesium acetate, calcium acetate, aluminum acetate, magnesium stearate, calcium stearate, stearin. Acid aluminum, aluminum isopropoxide, aluminum acetylacetonate, iron (II) acetylacetonate, chromium 3,5-ditertiarybutylsalicylate, etc., especially acetylacetone metal complex,
Salicylic acid metal salts are preferred. The amount added should not exceed 4% by weight with respect to the binder resin in order to avoid the above-mentioned adverse effects. If it is less than 0.2%, the substantial effect disappears. In addition to the above, nigrosine-based charge control agents can be used.

In the present invention, within the range in which the object of the present invention can be achieved, that is, in an amount of 40% by weight or less in a binder resin, a known thermoplastic resin such as polyester resin, urethane resin, epoxy resin, ethylene- Ethyl acrylate resin, phenol resin, styrene-butadiene resin, xylene resin, butyral resin, etc. may be mixed or modified for use. The blending amount of these known thermoplastic resins is more preferably not more than 20% by weight in the toner binder. Further, in the present invention, since the toner of the present invention is used as a magnetic toner, magnetic powder can be added. As the magnetic powder in this case, a substance that is magnetized by being placed in a magnetic field is used, and there are powders of ferromagnetic metals such as iron, cobalt and nickel or compounds such as magnetite, hematite and ferrite. When the iron oxide type magnetic material is used as a colorant, it is preferable to contain 20 to 60% by weight in the toner.

〔Example〕

Hereinafter, the contents, functions and effects of the present invention will be described in more detail with reference to polymer production examples, examples and comparative examples, but the present invention is not limited thereto.

[Production Example 1] 50 g of low-molecular-weight polypropylene (Sanyo Kasei VISCOL 660p) and 20 g of acetylacetone iron were placed in a kneader in a Labo Plastomill, and the mixture was kneaded at 120 ° C for 20 minutes, cooled, and pulverized to give fine powder. did.

17 parts by weight of the fine powder and polyoxypropylene (2,5) -2,2
-Bis (4-hydroxyphenyl) propane (545 parts by weight) was added to a four-necked flask equipped with a homomixer for stirring, a thermometer, a condenser, and a gas introduction tube. N ₂ gas was introduced into the reactor, and the system was kept at N ₂ atmosphere and heated to 50 to 60 ° C. by a mantle heater, and then terephthalic acid 135
By adding 38 parts by weight of trimellitic acid,
While maintaining the temperature at 130 to 150 ° C, stirring was continued for about 1 hour with a homomixer. Thereafter, the mixture was heated to 200 ° C. and kept at this temperature for about 5 hours while removing water of reaction, and then cooled to room temperature to obtain a polymer A. The content of the low molecular weight polypropylene-treated product in the polymer A was about 3.0% by weight.

[Manufacturing Example 2] Manufacture Example 1 is substantially the same as Manufacture Example 1 except that 40 parts of the low molecular weight polypropylene-treated product is used.
Polymer B was obtained.

The content of the low molecular weight polypropylene-treated product in the polymer B was about 7% by weight.

[Production Example 3] 900 parts by weight of 2,2-bis (4-hydroxyphenyl) propane, 15 parts by weight of sorbitol, 695 parts by weight of fumaric acid, and 39 parts by weight of the low-molecular-weight polypropylene-treated product of Production Example 1 were used. Polymer C was obtained in substantially the same manner as in Production Example 1.

The content of the low molecular weight polypropylene-treated product in the polymer C was about 3% by weight.

[Production Example 4] Polymer D was obtained in substantially the same manner as in Production Example 3, except that 13 parts by weight of the low molecular weight polypropylene-treated product was used in Production Example 3.

The content of the low molecular weight polypropylene-treated product in the polymer D was about 1% by weight.

[Production Example 5] Polymer E was obtained in substantially the same manner as in Production Example 1 except that 2.0 parts by weight of the carnauba wax modified product was used in Production Example 1.

Example 1 100 parts by weight of polymer A of Production Example 1, 2 parts by weight of iron acetylacetone, carbon black (Cabot Legal 400R)
A mixture of 2 parts by weight was heated and kneaded by a roll mill.
After allowing this to cool, it was coarsely crushed with a cutter mill and finely pulverized with a supersonic jet mill to obtain a toner having an average particle size of about 8μ. 15 parts of this toner was mixed with 85 parts of carrier iron powder (EFV200 / 300 made by Nippon Iron Powder) and supplied to a commercially available copying machine having a blade cleaning device (NP-5000 made by Canon) for development. As a result, a clear image having good fixability and no fog was obtained. Further, a running test was performed on 20,000 sheets, and a good image with almost no change was obtained. No offset was found on the fixing roll. In addition, clear images without contamination were obtained even under high temperature and high humidity conditions of 35 ° C and 90% RH.

Examples 2 to 6 In Examples 2 to 6, the polymers of Production Examples 1 to 5 were used, and 60 parts by weight of magnetic fine powder was further added to Example 1 to prepare toners. When this toner was applied to a commercially available copying machine (Canon NP-400), as shown in Table 1, in any case,
The image density was very high, the fixability was good, a clear image without fog was obtained, and there was no offset to the fixing roll.

[Comparative Example 1] Polymer F was obtained in substantially the same manner as in Production Example 1, except that low molecular weight polypropylene which had not been previously treated with a charge control agent was used in Production Example 1. . A comparison was made in the same manner as in Example 2 by using this polymer F and 2 parts by weight of iron acetylacetone. As a result, as shown in Table 1, fogging due to non-uniform charging property was observed, and image density was reduced due to durability.

[Comparative Example 2] Polyoxypropylene (2,5) -2,2-bis (4-hydroxyphenyl) propane, polyester resin G composed of terephthalic acid and trimellitic acid G 500 parts by weight, magnetic material 300 parts by weight, acetylacetone A mixture of 2 parts by weight of iron, 2 parts by weight of carbon black, and 15 parts by weight of low-molecular-weight polypropylene in which iron acetylacetone was dispersed in advance was kneaded by heating with a roll mill to obtain a toner according to the method of Example 1. When this toner was compared in the same manner as in Example 2, fog was observed as shown in Table 1, the image density was low, and the density was further decreased due to the durability. From this result, it was found that this toner was inferior in offset resistance and the dispersibility of the low molecular weight polypropylene in which iron acetylacetone was dispersed was insufficient.

[Outline of Effects of the Invention] The toner for developing an electrostatic charge image provided by the present invention has a wax component containing a polymer-forming monomer or a copolymer-forming monomer, in particular, a charge control agent. It contains a specific polymer obtained by a specific method of polymerizing under the condition that it has excellent fixability and anti-offset property, and further has extremely uniform and stable chargeability. It provides a high density image that is clear and has no fog, and is most suitable for fixing on a heat roller.

Claims (9)

[Claims] 1. A styrene homopolymer, a styrene copolymer, a polymethyl methacrylate, a polybutyl methacrylate, a polyvinyl acetate, a polyester obtained by polymerization in the presence of a wax component containing a charge control agent in advance. Contains a polymer or copolymer selected from the group consisting of polyamide, epoxy resin, polyvinyl butyral, polyacrylic acid, phenol resin, aliphatic hydrocarbon resin, alicyclic hydrocarbon resin, petroleum resin and chlorinated paraffin. A toner for developing an electrostatic charge image, which is characterized in that 2. The toner for developing an electrostatic charge image according to claim 1, wherein the copolymer is polyester. 3. The electrostatic charge toner according to claim 1, wherein the copolymer is a styrene-acrylic resin. 4. The electrostatic charge toner according to claim 1, wherein the toner is obtained through a step of heating and kneading the polymer or copolymer and a further charge control agent. 5. A styrene homopolymer or a styrene copolymer obtained by polymerizing a polymer-forming monomer or a copolymer-forming monomer in the presence of a wax component containing a charge control agent in advance. , Polymethylmethacrylate, polybutylmethacrylate, polyvinyl acetate, polyester, polyamide,
As a binder resin, a polymer or copolymer selected from the group consisting of epoxy resin, polyvinyl butyral, polyacrylic acid, phenol resin, aliphatic hydrocarbon resin, alicyclic hydrocarbon resin, petroleum resin and chlorinated paraffin is used. A method for producing a toner for developing an electrostatic charge image, which comprises: 6. The method for producing an electrostatic charge image developing toner according to claim 5, wherein the polymer-forming monomer is a polyester-forming monomer or a styrene-based polymer-forming monomer. . 7. The method for producing an electrostatic charge image developing toner according to claim 5, wherein the copolymer-forming monomer is a styrene-based copolymer-forming monomer. 8. The method according to claim 5, wherein the polymer-forming monomer or the copolymer-forming monomer is polymerized in the presence of a crosslinking agent.
7. The method for producing a toner for developing an electrostatic charge image according to any one of items (7) to (7). 9. The method for producing a toner for developing an electrostatic charge image according to claim 5, wherein the toner is obtained through a step of heating and kneading the polymer or copolymer and a further charge control agent.