JPS60198556A - Toner for developing electrostatic charge image - Google Patents

Abstract

PURPOSE:To provide a stabilized electrifying characteristic and improved fluidity and to form many times satisfactory visible images by incorporating toner powder and solid wax particles dispersed to exist mixedly among the toner particles of said toner powder into a titled toner. CONSTITUTION:A toner component incorporated with a coloring material, charge controlling agent, pulverous powder of a magnetic material and other toner components to be added according to need in a particle material of a binder resin is prepd. Solid wax is added to such toner powder and the mixture is, for example, gently agitated and mixed, by which the toner for developing electrostatic charge image is obtd. in the state in which the particles of the solid wax having >=0.1mu grain size exist mixedly among the toner particles. The ratio of the solid wax with the toner power is made 0.1-10wt% and the range where the ratio of the solid wax sticking to the toner with the toner particles of the small diameter particles does not exceed 0.05wt% is more preferable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a toner for developing electrostatic images formed in electrophotography, electrostatic printing, electrostatic recording, and the like.

[Technical background j Recently? As an image forming method, a method using an electrostatic charge imaging system is widely used. Depending on the temperature, an electrostatic charge image is formed, which is developed with a developer, and the resulting toner image is completely transferred to transfer paper and fixed to form a visible image. After residual toner adhering to the surface of the photoreceptor is removed by a blade or other cleaning member, the photoreceptor is used again for image formation.

[Prior Art] Powdered toners, which are so-called dry developers, are widely used as toners used for developing electrostatic images as described above. This powdered toner is composed of particles made of a binder tree containing an eyebrow tinting agent, a charge control agent, etc., and mixed with a carrier made of iron powder etc. to form a so-called two-component developer. The developer is used as a one-component developer, or the developer containing fine magnetic powder T is used as is.

It is known to further add other substances to the toner powder, and one specific example is to add a fatty acid metal salt to the toner powder. This means forms a thin film of the fatty acid metal salt on the surface of the electrostatic image support such as the original conductive material, so the cleaning characteristics (hereinafter simply referred to as "
"cleaning properties". ), and the surface of the electrostatic image support is less likely to be damaged.

However, conventionally, when a solid wax such as a fatty acid metal salt is added to toner powder, the charging characteristics of the toner change greatly compared to when it is not added.
The good charging properties achieved with toner powders are now significantly sacrificed, and the toner fluidity is also reduced. The visible image that is transferred has a low image density, and the charging characteristics are unstable, especially in a high humidity atmosphere. Problems such as disturbances in images occur.

Various improvement plans have been proposed for the above-mentioned problems, but in all of them, other problems arise in the manufacturing of toner or in the image forming process, and there are no solutions that are considered to be practically effective. It has not been discovered yet.

[Purpose of the invention]

The present invention was made based on the above circumstances, and although it contains solid wax, it has good and stable charging characteristics, has high fluidity, and can produce excellent visible images many times. An object of the present invention is to provide a toner 1c for developing an electrostatic image that can be formed over a wide range of applications.

[The birth of invention]

The toner of the present invention comprises a toner powder and solid wax particles dispersed so as to be intermixed between the toner particles of the toner powder.

The present invention will be specifically explained below.

8. In the present invention, necessary toner components such as a colorant, a charge control agent, a magnetic fine powder, and other additives are included in the particles of the inder resin. By obtaining a toner powder containing the above-mentioned toner powder, adding solid wax thereto, and stirring the mixture gently, for example, solid wax particles having a particle size of 0.1 micron or more are mixed between the toner particles. A toner for developing electrostatic images is obtained.

In the above 2, the ratio of solid wax to toner powder is 0.1 to 10% by weight, but the ratio of small diameter particles of solid wax attached to toner to toner powder is 0.05% by weight. Within a range not exceeding.

In particular, it is preferably 0.02% or less.

To this invention? Specific examples of solid waxes that can be used are as follows.

(1) Rough-in wax with a high melting point A relatively high melting point paraffin wax with a melting point of about 70 to 160°C can be effectively used in the present invention.

An example of such high melting point rough-in wax is microwax, which is a natural product.

Furthermore, there is Finscher-Tropsch wax which is synthesized, and also includes oxidized products or oxidized saponified products of these waxes.

Incidentally, examples of the high melting point paraffin wax that can be used include the following.

[Sasol Wax + 1tJ (manufactured by Sasol Marketing Company) Sasol Wax AIJ (manufactured by Sasol Marketing Company) [Sasol Wax A2J (manufactured by Sasol Marketing Company) [Microcrystalline Wax #220J (Mobil Oil Company) (manufactured by Nippon Oil Co., Ltd.)
"Santite A", "Santite B", [Santite CJ (manufactured by Seiko Kagaku Co., Ltd.) [22-) Litetracontanone] (Tokyo Kasei Co., Ltd.!#) "135° Nozo Rough In", "No. 1 Paraffin", 1
'-150° Micro Nozo Rough-in' (all Nippon Oil Co., Ltd.) 'Shell 135° Parafine Wax' (made by Shell Oil Co., Ltd.) [Hart7xJ, [Gleitmittel]
-KOJ (manufactured by West Germany) 1-Ampoule wax' (manufactured by Hodogaya Chemical) (2) Q
Examples of I & aliphatic fluorocarbon compounds include low polymer compounds of tetrafluoroethylene and hexafluorosolopyrene.

(3) Fatty acid esters, partially saponified products thereof, approximately 30~
Fatty acid esters with a melting point of 130°C or partially saponified products thereof, and esters obtained by fully reacting saturated or unsaturated fatty acids with saturated or unsaturated aliphatic alcohols, or these esters with total sodium and calcium It is obtained by partial saponification of metals such as aluminum, magnesium, lead, aluminum, aluminum, zinc, etc. with hydroxides. The fatty acids at °C used as raw material components may be either lower or higher, such as non-V phosphoric acid, caproic acid, enanthic acid, casorylic acid, pelargonic acid, capric acid, undecylic acid, lauric acid, ) lysosylic acid,
myristic acid, pentadecyl M,) e lumitonic acid, marcaric acid, sf 717 y acid, nondecylic acid, adipic acid, behenic acid, lignocerinoic acid, cerotic acid, montanic acid, melisic acid, hentriacontanonic acid, dotriacontanic acid Nonacid, tetratriacontanonic acid, hexatriacontanonic acid, octatriacontanonic acid, tuccinic acid, Lindel R11% lauroleic acid, tuzoic acid, myris) L/inic acid, seamarinic acid, petroselic acid, oleic acid, Elaidic acid, vaccenic acid, gadonic acid, erucic acid, zolacidic acid, ceracoleic acid, linoleic acid, liluic acid, eleostearic acid, linoleaidic acid, parinarin cR%, chydonic acid, glutaric acid, adipic acid, In addition to pimelic acid, sheric acid, azediic acid, sepacic acid, dicaric acid having a methen group having 9 to 19 carbon atoms, etc. can be mentioned. The aliphatic alcohols used as other raw material components may be either lower or higher like the fatty acids, and each may be 1 (DH alcohol or polyhydric alcohol, for example, methyl alcohol, ethyl alcohol, fluorocarbons, etc.). Biru alcohol, methyl alcohol, amyl alcohol, cabroyl alcohol, caprylyl alcohol, casolyl alcohol, lauryl alcohol, myristyl alcohol,
Heptyl alcohol, stearyl alcohol, aralyl alcohol, behenyl alcohol, carnabil alcohol, ceryl alcohol, colyanyl alcohol.

myricyl alcohol, mericyl alcohol, lactyl alcohol, allyl alcohol, crotyl alcohol,
2-buteno-1,2-pentenol-1,8-hetocenol-1,2-hegetenol-1,10-undecenol-1,11-dobcenol-1,12-)lyso-7-nor-1,4-leyl alcohol, elaidyl alcohol, lylyl alcohol, lylunyl alcohol, ethylene glycol, zolobile/glycol, t')) f lengericol, l,8-butane dial, l,4-zotanedial, 2,3- Buta/diol, 2-butene-yo, 4-diol, 1.5-bentanediol, 2.4-diol
Bentanediol, 1,6-hexanediol, 2,5
-hexanediol, 2-methyl-1,3-pentanediol, 2,4-hebutanediol, 2-ethyl-1,
3-hexanediol, 2-ethyl-2-buf-t,
3-pronozone diol, hexadecane-1,2-diol, octadecane-1,2-diol, eicosane-
1,2-Jol, tocosan-1,2-diol, tetracosan-1,2-thiol, diethylene glycol,
Examples include triethylene glycol, tetraethylene glycol, diethylene glycol, glycerin, pentaerythritol, and sorbitol.

However, when either the fatty acid or the aliphatic alcohol is of a lower grade, those having a higher potency can be particularly preferably used in the present invention. That is, among these esters composed of fatty acids and aliphatic alcohols, fatty acids having 5 or more carbon atoms are preferable;
Furthermore, esters having a total number of carbon atoms of 20 or more bring particularly good results in the present invention.

In the present invention, these fatty acid esters or partially converted products thereof may be used alone, or a mixture consisting of a mixture of various fatty acid esters,
Alternatively, it may be used as a mixture consisting of a mixture of fatty acid esters and partially converted products thereof. In the present invention, commercially available fatty acid esters or partially converted products thereof can be effectively used.
Among these commercially available products, there are many that have the composition of a mixture as described above. Typical commercially available products include, for example, the following.

1177117j Lower alcohol ester of acid "Butyl stearate" (manufactured by Yoken Fine Chemical Co., Ltd.) "Butyl stearate" (manufactured by Kako Soup Co., Ltd.) Polyhydric alcohol ester of fatty acid [Nirasan Castor Wax-AJ (manufactured by NOF Co., Ltd., glycerol tree) 1.2-hydroxystearate) ``Diamond Wax'' (manufactured by Shin Nihon Rika Co., Ltd.) ``Castor Hard'' (manufactured by Yoken Fine Chemicals Co., Ltd.) 11tf fatty acid higher alcohol ester ``Sparm Acetate'' (manufactured by NOF Corporation,
cetylno-P lumitate) ``Hoechstwax-E'' (manufactured by Hoechst Japan Co., Ltd., ethylene glycol ester of montanic acid) ``Hoechstwax-OPJ, (manufactured by Hoechst Chapin Co., Ltd., partially saponified zotylene glycol ester of montanic acid) Partial ester of alcohol “Monogly-M”
l (manufactured by NOF Corporation, α-glycerol monostearate) “Fatty acid monoglyceride R-604 (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd., stearic acid monoglyceride) [Fatty acid monoglyceride R-80J (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd., oleic acid
Stearic acid monoglyceride) ``Rigmar-8-200J (manufactured by Riken Vitamin Oil Co., Ltd., glycerin stearate) [Ligmar-B-1004 (manufactured by Riken Vitamin Oil Co., Ltd.,
Chrycerin Monopehe $-)) "Rigmar-8-300J (manufactured by Mken Vitamin Oil Co., Ltd., sorbitan monostearate) [Rigmar-Pa-+00J (manufactured by Riken Vitamin Oil Co., Ltd.,
Zoropylene glycol monostearate) r ATMU
L (Atomul)-T-95J (manufactured by Kako Atlas Co., Ltd., high purity monoglyceride) Mixed ester rVLTN-4J' (manufactured by Yoken Fine Chemical Co., Ltd.) rV
LT-LJ (manufactured by Yoken Fine Chemical Co., Ltd.) r K-3W
axJ (manufactured by Jllken Fine Chemicals Co., Ltd.) "Rice wax" (manufactured by Noda Wax Co., Ltd.) (4) Higher fatty acids Higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, ricinoleic acid, Arachic acid, behenic acid, lignoceric acid,
Mention may be made of ceracoleic acid, montanic acid, etc. and mixtures thereof.

In addition, commercially available higher fatty acids include rF-3,
r VLZ-200J (manufactured by Yoken Fine Chemical Co., Ltd.), "Powdered stearic acid with 6 markings of cherry blossom, pine, bamboo, and camellia", "
Beef tallow super JrNAA 222J, "221J (manufactured by NOF Corporation), rLunaa 8-40J, "S-9
0J, rDoS S-30J, [DoDo 8-55J, “DoDo 8-95
J, "1O-95J, rM, Y-s5", rMY-9
5'', rp-s5. ．． 1, r P-95J, rs-10
", rS-20J, ['I'-8-4J, rT-8-2
", rT-D-2J, rT-D-4J, r Kaohwax M-80", [same 85-) Guuda", [same 5SJ (
(manufactured by Kako Soup Co., Ltd.) and the like.

(5) Fatty acid metal salts Fatty acid metal salts include stearic acid zinc, cadmium, nocerium, t(), iron, nickel, cobalt, copper,
Metal salts such as aluminum and magnesium; dibasic lead stearate; metal salts of oleic acid such as zinc, magnesium, iron, conolate, copper, lead, and calcium; metal salts of palmitic acid such as aluminum and calcium; cazolyl Lead acid; Lead cassilonate; Salivary lead dinolate; Conolate linoleate; Calcium ricinoleate; Zinc ricylinate;
Examples include metal salts such as cadmium; and mixtures thereof.

(6) Higher Alcohols The higher alcohols may be monohydric alcohols or polyhydric alcohols, and representative examples include tositelauryl alcohol, myristyl alcohol, aracyl alcohol, and behenyl alcohol. In addition, commercially available higher alcohols include "Calcol 08j", "Calcol 10J", "Calcol 20J", "Calcol 24",
"40", "42", "60", "68", "
80, 86, 468, 524
", "624J (manufactured by Kako Soap Co., Ltd.), etc.

(7) Fluorine-containing surfactant Examples of this include the flute-containing surfactant described in JP-A-55-124428.

In the present invention, one or more of the above mukagata no'nokusu σ] can be used in an appropriate combination.

Uninvented toner powder book mw. -')9 Inme tree 1
As a matter of fact, S is used for this purpose (J)
You can also use Akira or natural sanchium.

j1 which gives blood which is polymerized and used as pine goo resin! As a specific example of a mer, for example, styrene, 0
-Metersteret/, m-methylstyrene.

p-menalmethylene, α-metelstyrene/. p-ethylstyrene, b,4-)methylmethyl/, p-n-butylstyrene p-tert-butylstyrene, p-n
-Henrensterene, pn-n cutyl styrene. p-
n-nonylstyrene, p-n-decylstyrene p-
n-F decylstyrene, p-methodecysterene. Methylene ethylene, propylene, butylene such as p-phenylstyrene, pplorstyrene, 3,4-dichlorostyrene. Ethylenically unsaturated olomonoolefins 7 such as isobutylene; vinyl halides such as vinyl chloride, vinylidene chloride, vinyl bromide, and vinyl fluoride; vinyl acetate;
Vinyl esters such as Solovian vinyl, benozoene vinyl, and butylene vinyl; acrylic methyl, acrylic ethyl, acrylic mn-dityl.

Acrylic intermittent isosol 1. Acrylic m zorovir, acrylic ffy-II A methyl, acrylic tridodecyl 1. Acrylic string lauryl, acrylic string 2-ethyl to 1,000 sills, acrylic string sudearyl. Acrylic 2-chloro ether, acrylic trinoenyl, α-chloroacrylic methyl, ivy acrylic methyl, methacrylic ethyl, methacrylic propyl, methacrylic n-zotyl, methacrylic isozotyl, methacrylic n-;4-cutyl, α-methylene monocarbons such as methacrylic compound, methacrylic compound lauryl, methacrylic di-2-ethyl to 1,000 sil, methacrylic stearyl, methacrylic phenyl, methacrylic dimethylaminoether, methacrylic dimethylaminoethyl, etc. Acid esters;
Acrylic acid or methacrylic fermentation conductors such as acrylonitrile, methacrylonitrile, acrylamide;
Vinyl ethers such as vinyl methyl ether, vinyl ethyl ether, and vinyl isofthyl ether; Vinyl ketones such as vinyl methyl ketone, vinyl hexyl ketone, and methyl isozolobenyl ketone; N-vinylpyrrole, N-vinylcarbasol, and N-vinyl Indore, N.
- N-vinyl compounds such as vinylpyrrolidone; vinylnaphthalenes and others.

Also, propadiene, butadiene, -isoprene, chlorozolene, pentadiene, and hexadienate can be used.

These monomers may be used alone or in combination, or may be polymerized to form a copolymer.

Furthermore, in the present invention, i giving a polymer by condensation polymerization
As a polymer, a combination of a polyhydric alcohol substance and a polyhydric carboxylic acid substance that gives polyester, and polyamide)
A combination of a polyvalent amine substance and a polyvalent carboxylic acid substance that gives No. 11 can be mentioned. Specific examples of the polyhydric alcohol substances mentioned above include ethylene glycol, triethylene dalycol, l,2-propylene glycol,
l,3-propylene glycol, 1,4-7'tanediol, neopentyl glycol, l,4-butynediol, 1,4-bis(hydroxymethyl)cyclohexane, bisphenol A1 hydrogenated bisphenol A1 polyoxyethylated bisphenol -/L/A, polyoxypropylenated bisphenol A, and others, and specific examples of polyvalent amine substances include ethylenediamine, tetramethylenediamine, pentamethylenediamine, piperazine, hexamethylenediamine, and others. Specific examples of polycarzenic acid substances include maleic acid, fumaric acid, mesaconic acid, citraconic acid, itaconic acid, glutaconic acid, phthalic acid, isophthalic acid, terephthalic acid, cyclohexanedicalonic acid, succinic acid, Examples include adipic acid, cepatic acid, malonic acid, esters of these with fish aqueous substances or lower alcohols, dimers of liluic acid, and others, and further polyvalent carboxylic monomers of trivalent or higher valence. and L°C are, for example, 1, 2.
4-benzenetricalcarnic acid, 1,2.5-benzenetricaldic acid, 1,2.5-benzenetricaldic acid, 2.4-naphthalenetricarzenic acid, 1,2.4
-butanetricardinic acid, 1,2,5-hexanetricardinic acid, l,3-dicarxyl-2-methyl-2-
Mechire/Power, Ru, I? Examples include xyzolonone, tetra(methylenecar2xyl)methane, 1,2,7.8-octanetetracarmonic acid, empol trimer acid, acid anhydrides thereof, and others.

A coloring agent is usually contained in the toner powder particles of the toner of the present invention. The coloring agents used here include carmen black, nigrosine dye (C, 1, 50415B), aniline blue (C, 1,4g 50405), calcooilzo/l/-(C,I, 16azoea Blue).
3), Riohye a-(C, 1, 414090),
Ultramarine Sol-(C,1,1677103), DuPont Oil Red (C,1./16zsxo5), Quinoline Yellow (C,1,/1647005), Methylene Blue Chloride (C,1,,1652015), Phthalo-7 Anine Sol-( C.

1, A74160), malachite green offsalate (c, x, ag4zooo), ranci black (C, 1
, A77266), Rose Penga/I/(C,1,44
5435), mixtures thereof, and others.

These colorants need to be contained in a sufficient proportion to form a visible image with sufficient concentration, and are usually contained in a proportion of 1 to 20 parts by weight per 100 parts by weight of resin. Ru.

Further, in order to make the toner magnetic, fine particulate magnetic material may be dispersed and contained in the toner particles.

The fine particulate ferromagnetic material includes substances that are extremely strongly magnetized in the direction of a magnetic field, such as iron such as ferrite, magnetite, hematite, etc., alloys or compounds containing ferromagnetic elements such as conocerto, niraglu, etc. Or alloys that do not contain ferromagnetic elements but become ferromagnetic through appropriate heat treatment, such as Heusler alloys containing manganese and copper such as manganese-copper-aluminum or manganese-steel-tin. An alloy of Lfi Wi called Lfi Wi or chromium dioxide can be effectively used, but it is preferable to use γ-hematite as a magnetite companion.

These ferromagnetic materials have an average particle size of approximately 0.5 to 1 mm.
'7'' f4 degree is desirable, and the content is desirably about 30 to 70% by weight based on the entire toner.

Further, in order to control the charge of the developer, certain dyes or pigments may be added as charge control agents. Examples of these charge control agents are described in Japanese Patent Publication No. 41-2427. Just like friction M 'i nature,)
ehwarzHBN; Color index A2615
0), alcohol-soluble nigrosine
5udan Lief-s
chwarz BB; Solvent Grak 3; Color Index 426150)
Pr it Schwarz'l''N; Falpen, Fabriken, )9ia), Zaponspary X
(Zaponschwarz x; y Alperk, Hoechst Company F, one t V s' with negative triboelectric charging properties)
/ Yu/MaA/y (R)Q (Ceresschw
arz (R) G'.

Chromogen Spa A/7 ETOO (Chromogen)
schwarzETOO: Color Index Shop 146
45)% Azo Oil Black (R) (Azo-Oi
l Black (R): National, manufactured by Aniline), Spiron! Examples include dyes such as Lac TRH (manufactured by Odugaya Kagaku Co., Ltd.) and Zentron 534 (manufactured by Orient Kagaku Co., Ltd.), and pigments such as other phthalocyanine sols. In addition, oxidized casen black and resins having positive or negative charge control properties can be considered as a kind of charge control agent.

Further, in order to completely improve the compatibility of these charge control agents with the resin component, they can be added in the form of salts formed with higher fatty acids, or a compatibility improver may be added separately. In step 1, for example, a heating roller is used in the fixing process.
The developer used in this type of image formation has a releasing effect on the mud layer roller 1111!
l*, even fatty acid metal salts such as cadmium hastearate, no9ium sudeate, zinc oleate, conomalt nosolmitate, and relatively low molecular weight polyethylene V
or polyzolopyrene (softening point -80 to 160℃ (
JIS standard 2531-1960, preferably Fi 100-160°C), higher fat #M having 28 or more carbon atoms, higher alcohol and amide wax, silicone face, t + m fatty acid ester, partially saponified Fatty acid esters, polyhydric alcohol esters, natural T) or synthetic A-roughins, etc. [Can be added alone, or in combination, and in cases where the resin component has relatively brittle properties. , Is this a plasticizer for T modification? Can be added.

[Function and effect of the invention]

As mentioned above, the toner of the present invention is smooth and quick.As is clear from the description of the embodiments, the effect of having a strong solid wax is achieved, and the adverse effects of temporarily containing the solid wax are rarely caused. The toner has good charging characteristics and good fluidity, and the charging characteristics are stable even when exposed to a humid atmosphere. In addition, it is possible to obtain a good visible u+u image without any smearing, and to transfer a sufficiently good toner image even in a high-humidity printing atmosphere using the static 1&Lk transfer method. -t L
'C solid wax, for example fatty acid gold M salt such as zinc stearate, adheres to the surface of the electrostatic image support in a thin layer as in the past, and the cleaning properties are greatly improved. A good visible image can be formed many times.

The reason why the toner of the present invention has the above-mentioned VU, excellent T, -ff effects is that in the conventional method, when solid wax is added to toner powder, fine stirring is carried out to form the solid wax gold toner particles. The solid wax is layered by rubbing it on the surface (this usually results in solid wax having a particle size of less than 0.1 micron), and the solid wax is not left as independent particles. However, the surface condition of the toner particles changes depending on the amount of solid wax attached, and as a result, the excellent charging characteristics of the toner particles are impaired, resulting in a decrease in fluidity.

In the present invention, since the solid wax is mixed between the toner particles as a particle independent of the toner particles and is suppressed from being attached to the surface of the toner particles, the surface condition of the toner particles is The electrostatic charge image support is maintained for a long time, exhibiting good charging characteristics, and ensuring a good flow rate. Moreover, when the electrostatic charge image support is developed, the solid wax particles are removed together with the toner particles from the developing sleeve, etc. In order for it to spread and adhere more effectively, it can be said that the first effect is that it is fully effective.

〔Example〕

Examples of the present invention will be described below, but the present invention is not limited thereto. Na 3 ``bu'' represents the consideration section.

Example 1 Styrene: Methyl methacrylate 100 parts of a styrene-methyl methacrylate copolymer of 70:30 by weight [-Carbon Blank #30'' (manufactured by Mitsubishi Chemical Corporation) 10 parts of a charge control agent [Zentron R-04J (Orient Chemical Co., Ltd.) ) 5 parts of the above material P) Mixed in ksee/l mill I7, then 2
The mixture was kneaded with a main roll, cooled at 1:28, and then pulverized and classified to obtain toner powder At with an average particle size of 12 microns.

Add 100 parts of this toner powder A to 100 parts of hydrophobic silica fine powder Song 11 (-972J (Nichifuryoko [Sujiru Sha Nai 1ri) 0.8 san 5 Zinc stearate (NOF IJ't) 0.4 tjμ The toner A of the present invention was produced by mixing for 10 minutes in a full turbulence mixer. When this toner was observed with a mirror, it was found to be white KM, as shown in the photograph in FIG. It was observed that the zinc stearate particles contained in the toner particles were present as particles of 1 to 20 barons independently without being attached to the black toner particles (the length of the particles was 1 micron in the photograph). Equivalent to.).

Then, 5 parts of this toner A and 95 parts of iron powder carrier were mixed to prepare a developer, and the temperature was adjusted using the U-HixVJ (manufactured by Konishiroku Photo Industry Co., Ltd.) for photocopying. A copying test was carried out in an atmosphere of 20'C and relative humidity of 40%. : All of the true photographs have a high image value of approximately L31, and are very powerful! Even if the number of copies has exceeded 20,000 times, it will be difficult to copy 7 copies II! I can't get lI+*'x. Furthermore, even in a copying test in a high-temperature, high-humidity atmosphere with a temperature of 30°C and a humidity of 70%, the same VC result was formed.

Example 2 Polyester resin II% IB/5Uj (Diamond Shamrock Company H) 1oss1-card? Toner lumber B-z with an average particle diameter of 12ξ croms was obtained in the same manner as described in the above-mentioned Material r Actual Picture Triangle 1.

A toner Bi was prepared in the same manner as in Example 1 except for using this toner package b2. Similarly, it was found that this toner B had zinc stearate particles with a particle size of 1 to 20 microns existing independently without adhering to the toner particles.

Using this toner J3i, a developer' (+J4. !II An excellent copy image of b1 degree r41 could be obtained.

Example 3 Styrene-methyl methacrylate copolymer with styrene:methyl methacrylate ratio of 70:30 100 parts "Magnetite EPT-1000J (manufactured by Toda Kogyo Co., Ltd.)" 120 parts "Carbon blank 4 #30" 1 part 111 til control agent r Nigrosin Pace ExJ (manufactured by Orient Chemical Co., Ltd.) 2 parts The above materials were treated in the same manner as in Example IK to obtain toner powder (4-) with an average particle size of 12 microns. Toner C was entirely produced in the same manner.

Similarly, it was found that this toner C had zinc stearate particles with a particle size of 12 microns existing independently without adhering to the toner particles.

Then, this toner powder Ci No. 11 was used as a developer,
Copying test using electrophotographic copying machine [C1-Bix IOJ (manufactured by Konishiroku Photo Industry Co., Ltd.) and copying test under high temperature and high humidity atmosphere]? As a result, it was possible to obtain an excellent copy image similar to that in Example 1.

Comparative Examples 1-3 Zinc stearate, etc. for each of toner powders A-C
In addition, Example 1 except that after dispersing and mixing, glass beads were mixed in the turbular mixer to obtain a large shearing force and mixed and stirred for 30 minutes as in the conventional method.
A total of three types of comparative toners were produced in the same manner as in Example 3. When a copying test was carried out in the same manner as in Examples 1 to 3 using each tray of the comparative toner obtained here, the obtained copied images had a low image roughness. When two reproduction tests were carried out in an atmosphere, it was observed that white spots in the image were caused by partial failure of transfer during transfer.

Comparative Example 4 For manufacturing toner A? And zinc stearate? Comparative toner 7 was prepared in the same manner as in Example 1 except that no additive was added, and a copying test was conducted in the same manner as in Example 1 using this sound.
As in the case of toner, a copy image with a high image density of about L31 was formed.

But the number of copies is 500? If this was exceeded, stains that were recognized to be due to poor cleaning of the kanji appeared, resulting in low-quality copied images.

Agent: Masahiko Oi, Patent Attorney (method for writing procedural amendments) % formula % 2. Name of the invention: For electrostatic image development 1-ner 3. Person making the amendment: Relationship with the case Patent applicant address: Tokyo 1-26-2 Nishi-Shinjuku, Shinjuku-ku Name
(127) Konishiroku Photo Industry Co., Ltd. □4, Agent 5, Amendment Order El l=1 June 1980 2607
, Contents of amendment 1) Submit a separate copy of the specification (amended by adding the description in the brief explanation of the drawings column to the procedural amendment order).

2) Delete what was submitted as the first drawing.

Lines 13 to 15 on page 31 of the specification are deleted.

Claims (1)

[Claims] 1)) A toner for developing an electrostatic image, characterized in that it comprises a toner powder and solid wax particles whose molecules are mixed between the toner particles of the toner powder. . 2) The toner for developing electrostatic images according to claim 1, wherein the solid wax particles have a particle size of O.t microns or more. 3) The toner for developing an electrostatic image according to claim 1 or 2, wherein the proportion of small diameter solid wax particles adhering to the toner particles is 0.05N% or less of the toner powder.