JPH03138657A - Color toner and image forming method - Google Patents

Abstract

PURPOSE:To obtain bright full-color images having a high image density and glossiness with good fixability by incorporating a thermoplastic resin, charge control agent and coloring agents into the toner and forming the thermoplastic resin and the charge control agent of specific compds. CONSTITUTION:The thermoplastic resin is the high-polymer compd. contg. the monomer expressed by formula I or II as its constituting unit and the number average mol. wt. Mn and weight average mol. wt. Mw thereof satisfy 600<=Mn<=12,000, 2.0<Mw/Mn<3.5. The charge control agent is the compd. expressed by formula III. In the formulas I, II, R1, R3 or CH3, R2 signify 1 to 17C alkyl group or phenyl group; R4 signifies 1 to 4C alkyl group. In the formula III, R5 to R8 respectively signify H or 1 to 10C alkyl group; X<+> is paired ions and signifies hydrogen, ammonium, etc. The bright full-color images having the high image density and the high glossiness are obtd. with the good fixability in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a full-color toner as a two-component developer used in electrophotographic copying machines and printers, and a transmission image forming method using the same.

To form an image using an electrophotographic copier or printer, the surface of the photoreceptor, which is the image carrier, is first uniformly charged, and then exposed to light based on a pattern that corresponds to the image on the original. Alternatively, the output content is written onto a photoreceptor with light to form an electrostatic latent image. Next, the surface of the photoreceptor having this electrostatic latent image is developed (visualized) using a developing device, and the obtained toner image is transferred to a transfer material such as paper.

In such a developing device, a magnetic plan consisting of a magnetic carrier with toner attached to the surface is formed on the surface of the developing sleeve by magnetic force, and this magnetic plan is brought into sliding contact with the surface of the photoreceptor, thereby forming an electrostatic latent image on the surface of the photoreceptor. Perform visualization. The toner used here usually includes a thermoplastic resin, a colorant,
It consists of a charge control agent, a fluidizing agent, a cleaning agent, etc.

Problems to be Solved by the Invention In such electrophotographic systems, various types of color toners have been proposed for forming full-color images.

For example, JP-A-55-6895, JP-A-59-100
No. 452 discloses a toner using a thermoplastic resin having a predetermined molecular weight or molecular weight distribution.

However, a color toner that has high toner adhesion, high image a degree, and glossiness, and provides a clear full-color image with excellent translucency for OHP use has not yet been obtained. Particularly in actual use, color toners with high overall quality without toner scattering or fogging are required, and toners satisfying such requirements have not been obtained to date.

An object of the present invention is to obtain color toners and combinations thereof that have good fixing properties, high image density and gloss, can provide clear full-color images, and have good OHP translucency.

Means for Solving the Problems The present invention provides a color toner containing a thermoplastic resin, a charge control agent, and a colorant, wherein the thermoplastic resin is a monomer represented by the following formula [1] or [(I]). 1 or 2 mer
A polymer compound containing more than one species as a structural unit,
and its number average molecular weight (M n ) and weight average molecule ffl (Mw) satisfy the following formula 6 formula %, and the pigment is yellow pigment C1, Pigment Yellow 13, magenta pigment C1, Pigment Red ( Pigmen
Red) 57.11 or Nian pigment C. I. ，
Pigment Blue 1
5:3, and the charge control agent is a compound represented by the following formula [■], and a combination kit of these three color toners is provided. It is from et al. Further, the present invention provides a method of forming an image on an OHP unit using such toner.

The thermoplastic resin used in the toner of the present invention has the following formula [1
It is a homopolymer or copolymer having one or more monomers represented by [F or C1l] as a constitutional unit.

1 [13 CH,=C-COOR.

HC=CHR3 [n] [In the formula, R, SR3 are H or C1] 3, ■ヱ, is an alkyl group having 1 to 17 carbon atoms or a phenyl group, and R4 is an alkyl group having 1 to 4 carbon atoms. ] Examples of the monomer of formula E11 include methyl acrylate, ethyl acrylate,
n-butyl acrylate, isobutyl acrylate, propyl acrylate, n-ocdyl acrylate, dodenyl acrylate, lauryl acrylate, 2-ethylhexyl acrylate, stearyl acrylate, phenyl acrylate,
Methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-octyl methacrylate, dodenyl methacrylate, lauryl methacrylate, 2-edylhexyl methacrylate, stearyl methacrylate, phenyl methacrylate, etc. Acrylic acid or methacrylic acid derivatives are used.

Examples of the monomer of formula [111] include styrene, 0-methylstyrene, m-methylstyrene, p-ethylstyrene, 2. Examples include styrenes such as =1-n-methylstyrene, p-n-butylstyrene, and tert-butylstyrene.

Furthermore, the number average molecular weight ((i n ) of the mature plastic resin
and the weight average molecule ffl (Mw) is calculated by the following formula.

6000≦Wealth n≦+2000 2 , 0 < Iviw / M n < 3 , If the 5-number average molecule Q M n is less than 6,000), the fixability of the toner decreases and filming tends to occur.

On the other hand, if Mn exceeds 12,000, the OHP translucency decreases, and the toner fixing properties and glossiness also deteriorate. The value of n is preferably 10,000 or less.

Furthermore, when %i W /Mn is less than 2.0, toner fixability is poor. On the other hand, when Mw/Mn is 3.5 or more, fixing properties and glossiness are poor, and OHP translucency is reduced.

Incidentally, Mw and Mn were all measured by gel vermeylon chromatography. That is,
A solvent (tetrahydrofuran) was flowed at a flow rate of 1 mQ/min at a temperature of 25°C, and a tetrahydrofuran sample solution with a concentration of 0°4 g/dQ was injected into the 811IQ for measurement. For molecular weight measurement, measurement conditions were selected in which the molecular weight distribution of the sample was within a range where the logarithm of the molecular weight and the count number of a calibration curve prepared using several types of monodispersed polystyrene standard samples were linear. The reliability of this measurement is based on the NBS 706 polystyrene standard sample (Mw = 28.8xlO', M n = 13, 7
x t O', Mw/Mn=2.11) h4 w /
It was confirmed that tvl n was 2.11±0.1.

Next, the following pigments are blended into the three color toners of the present invention. As the yellow pigment, yellow pigment: C
, T, Pigment Yellow (Pigm6nt Yel
low) 13 is blended. Examples of red pigments include magenta pigments and C.I. I. , Pigment Red (Pigme
nt Red) 57:1 is used. As a blue pigment, cyan pigment: C,! , Pigment Blue (
PigmentBlue) 15:3 is used. By selecting such a pigment, sufficient image density can be obtained, and there is no toner scattering or image fogging.

Next, as a charge control agent, the following formula [ [[In the formula, R3-R8 are each H or an alkyl group having 1 to 10 carbon atoms, Xo is a counter ion, hydrogen, ammonium,
meaning aliphatic ammonium or aromatic ammonium] A compound represented by the following is used. By using such a charge control agent, the full color toner of the present invention is free from toner scattering and image fogging during image formation.

Furthermore, ponds and 7) internal machining may be appropriately added to the toner of the present invention, if necessary.

For example, a wax or the like may be added, or a wax made of a low molecular weight olefin polymer containing monomers may be used. The low molecular weight olefin polymers include low molecular homopolymers, copolymers, or modified products thereof having the formula % [wherein R means hydrogen shell or carbon T, or an alkyl group of number 4 or less] For example, in addition to low molecular weight polyethylene, polypropylene, α- or β-polybutylene, ethylene-propylene copolymer, polyethylene wax, oxidized polyethylene, and chlorinated products, ethylene or propylene-based materials, vinyl acetate, maleic anhydride, acrylic acid or its ester, methacrylic acid or its ester, acrylamide,
Random copolymers, block copolymers or graft copolymers (low molecular weight polymers) modified with one or more other ethylenically unsaturated monomers such as methacrylamide, acrylonitrile, and methacrylonitrile. You can use things.

Other examples include naturally occurring waxes such as vegetable wax, animal wax, solid starch fat, and mineral wax, as well as waxes made of higher fatty acids or their derivatives, canodeilla wax, carnauba wax, and rice wax. Alpha-based waxes such as wax, tree wax, palm wax, Ouriki colly wax, sugar cane wax, esparto wax, and park wax, animal waxes such as beeswax, lanolin, squeeze wax, montan wax, osikelite, selenone, etc. Mineral waxes, paraffin waxes, microcrystalline waxes, petroleum waxes such as petrolactam, synthetic hydrocarbons such as Futshya Trobunkowanox (Sasol wax), montan wax derivatives,
Modified waxes such as paraffin wax derivatives and microcrystalline wax derivatives, hydrogenated waxes such as hydrogenated castor oil and hydrogenated castor oil derivatives, derivatives such as 12-hydroquinostearic acid, its amides and esters, metal sebukenes, and higher grades (C, ~C! saturated fatty acid amide, unsaturated fatty acid amide and hydroquino fatty acid amide, N-methylol fatty acid amide, N,N'-methylene fatty acid amide,
Amide waxes such as N,N'-methylene fatty acid amide, noalkyl ketones of higher fatty acids, waxy digital amines, imides, fats and oils such as glycerides (anruglycerin), -hydric alcohol fatty acid esters, glycerin fatty acid esters, glycols Esters such as fatty acid ester, sorbitan fatty acid ester, polyoxine ethylene fatty acid ester, phthalate ester, alkali metal salts and alkaline earth metal salts of higher fatty acids such as calcium stearate, aluminum stearate, magnesium stearate, calcium palmitate, Metal salts such as zinc salts and aluminum salts; hydrazides of higher fatty acids such as palmitic acid hydrazide and stearic acid hydrazide; p-hydroquinanilides of higher fatty acids such as p-hydroxyanilide of myristyrenic acid and p-hydroxyanilide of stearic acid; β-diethylaminoethyl ester hydrochloride of higher fatty acids such as β-diethylaminoethyl ester hydrochloride of acid, β-diethylaminoethyl ester hydrochloride of stearic acid; such as stearic acid amide-formaldehyde condensate, palmitic acid amide-formaldehyde condensate Higher fatty acid amide-formaldehyde condensates; petroleum residues such as asphalt and giltnite; rubbers such as nitrile rubber and chlorinated rubber; synthetic hydrocarbons such as Fischier-Tropsch wax and derivatives; halogens such as chlorinated paraffin and chlorinated propylene. Examples include hardened oils such as hydrogenated hydrocarbons, hardened castor oil, and hardened beef tallow oil, which may be used alone, in combination, or in combination with the low molecular weight olefin polymer.

Further, a fluidizing agent may be added to the toner of the present invention.

As the fluidizing agent, silica/aluminum oxide, titanium oxide, silica/aluminum oxide mixture, silica/titanium oxide mixture, etc. are used. In particular, a mixture of silica and titanium oxide is more preferable, with a ratio of silica and titanium oxide of 7.
Lika/titanium oxide 01-0.3% by weight, 10.1-1% by weight, preferably added in an amount of 0.1-2% by weight based on the toner. The fluidizing agent may be subjected to hydrophobic treatment using a coupling agent or a surfactant.

As such coupling agents, coupling agents such as so-called Nran coupling agents, titanium coupling agents, aluminum coupling agents, zircoaluminum coupling agents, or noricorn oil may be used alone or in combination of two or more. be able to.

In addition, as external surfactants, cationic surfactants such as fatty U5 group amine salts, quaternary ammonium salts, alkylpyridinium salts, pennol halide type, fatty acid salts, sulfated ura, sulfated ester ura, and sulfated amide oil are used. , olefin sulfate ester salts, fatty alcohol sulfate ester salts, alkyl sulfate ester salts, fatty acids, ethyl sulfonate, alkyl sulfonate, alkylnaphthalene sulfonate, alkylbenzene sulfonate, naphthalene sulfonate and Mixtures of formalin, anionic surfactants such as succinic acid ester sulfide salts, phosphate ester salts, polyoxine ethylene alkyl esters, polyquinoethylene alkyl ethers/enol ethers, polyoxine ethylene alkyl esters, sorbitan alkyl esters, polyoxyethylene sol and tan alkyl esters, fatty alcohol ethylene oxide,
Nonionic surfactants such as polyethylene glycol, amphoteric surfactants such as imigzolin derivatives, higher alkylaminos, sulfate esters, phosphate esters, and sulfonic acids, oil-soluble surfactants, or two types The above can be mixed and used.

To produce the toner of the present invention, the ingredients listed below are mixed,
Manufactured by conventional processing.

The full-color toner of the present invention is suitable for forming images on 0l-(P (overhead brochure)). In other words, the full-color toner of the present invention is suitable for forming images on 0l-(P sheet). By using the toner, the fixing properties of the combination color toner are improved.

Note: If the softening point of the polyester resin is higher than 150° C., the fixing properties will be poor and the translucency of the 0l-IP notebook will be reduced. On the other hand, if the softening point is less than 80°C, the heat resistance will be poor and sticky. As such Ij resin, for example, a resin synthesized from a polyol component and dicarboxylic acid is used. The polyol components include ethylene glycol, triethylene glycol, 1.2-propylene glycol, 1.3-propylene glycol, 1.4-butanol, and 1.4-propylene glycol.
-Bis(hydroxymethyl)isoclohexane, bisphenol A1, hydrogenated bisphenol A1, polyoxine ethylenized bisphenol A, etc. can be used. In addition, dicarboxylic acid components include maleic acid, fumaric acid, mesaconic acid, citraconic acid, itaconic acid, glutaconic acid, phthalic acid, isophthalic acid, terephthalic acid, succinic acid, anopic acid, sepatic acid, malonic acid, etc. . A known method can be used to form an image on an OHP sheet using the color toner of the present invention.

Eri: The toner of the present invention has a low melt viscosity and excellent OHP translucency. Further, the toner of the present invention has good fixability to an OHP sheet coated with a polyester resin.

Weekly Oniko Next, the present invention will be explained in more detail with reference to Examples.

In the examples, parts mean parts by weight. The results of image formation using the color toners obtained in Examples and Comparative Examples are shown in Table 1.

[Manufacture of charge control agent] Synthesis Example 1 After adding 15 g of NaOH to water IQ, 75 g of 2-hydroquine-3-naphthoic acid was added to obtain an aqueous solution (aqueous solution 1). Wed 040. 34.3 g of aluminum sulfate was dissolved in the solution to obtain an aqueous solution (aqueous solution 2). Aqueous solution 2 to aqueous solution 1
It was gradually added dropwise to the solution and stirred at about 90°C for 1 hour. The mixture was cooled to about 40° C., filtered, washed with water, and dried to obtain 85 g of the following compound [I11].

[I[1a] Synthesis Example 2 After adding 5 g of NaOH to water IQ, 75 g of 2-hydroquino-3-salicylic acid was added to obtain an aqueous solution (aqueous solution 3). Crt(SO4)*393g was dissolved in 0.4Q of water to obtain an aqueous solution (aqueous solution=1). Aqueous solution 4 was gradually added dropwise to aqueous solution 3, and the mixture was stirred at about 90° C. for 2 hours. The mixture was cooled to about 40° C., filtered, washed once with water, and dried to obtain about 87 g of the compound El'V'l of the following formula.

[Production of color toner] Example 1 (1) Yellow toner Styrene/n-butyl methacrylate copolymer (Mn
= 8300, "yl w / M n = 2, 3
, Tg=65°C) 100 parts, *7 JiE compound CIII
] ils Oyohi Lionol Yellow FG
-1310 (manufactured by Toyo Ink Mfg. Co., Ltd.) was thoroughly mixed in a Henschel mixer, kneaded in a twin-screw extruder, and then cooled. Particle size: 5 to 25 μm (average particle size: 13.5 μm)
µm) particles were obtained. Next, hydrophobic silica R972 (
Made by Nippon Aerosil (Madhi)) 1 part O and titanium oxide T-80
5 (manufactured by Nippon Aerosil (Aji)) was mixed to prepare yellow toner (1).

(+1) Lionol Red 6B FG-421 as magenta toner pigment
3 (manufactured by Toyo Ink Manufacturing Co., Ltd.) was used to prepare the compound "
1■'''I7) Magenta toner (1) was produced in the same manner as the yellow toner described in 1) except that the amount added was 0.5 part.

(iii) Lionol Blue FG-7350 (as a cyan toner pigment)
Compound C [
Cyan toner (1) was produced in the same manner as the yellow toner, except that the amount added was 15 parts.

Example 2 (1) Yellow toner styrene polymer (Mn=7000, Mw/Mn
-26, Tg=80°C) 100 parts, compound CIII] (
Orient Chemistry) Part 1 and Light Fast
A yellow toner (2) was prepared in the same manner as in Example 1 using 25 parts of Pigment Yellow R (manufactured by Nanyo Shiki Co., Ltd.).

(11) Lionol Red 8B 4601 (
Compound CI
The yellow toner (
Magenta toner (2) was produced in the same manner as in Example 2).

(iii) Cyanine Blue KRO (manufactured by Nanyo Shiki Co., Ltd.) 2.5 parts was used as the cyan toner pigment, and the amount of the compound Ell'il added was 15 parts. Toner (2) was produced.

Example 3 (iXii) (...) Styrene/n-butyl methacrylate copolymer (St/n-BMA-=70/3 as binder resin)
0, M n = 6300, Mw/1vin = 2.4,
Example 1 (iXii
) (il) and yellow toner (3) respectively.
, which produces magenta toner (3) and cyan toner (3).

Comparative Example + < 1) (:; ) (:i) In Example 1, styrene/n-butylmethacrylate-I/copolymer (Njn=13000, Vi w
/ M n = 3, 0, Tg = 68°C) was processed in the same manner as in Example 1, and yellow toner (4
), magenta I toner (4) and cyan toner (・1
) was manufactured.

Comparative Example 2 (i Xii X1ii) In Example 1, styrene/n- was used as the binder resin.
Butyl methacrylate copolymer (xs n =2800
, M w / M n = 3, 1, Tg = 62°C)
A yellow toner (5), a magenta toner (5), and a cyan toner (5) were produced in the same manner as in Example 1 except that a yellow toner (5), a magenta toner (5), and a cyan toner (5) were respectively produced.

Comparative Example 3 (i Xii
Butyl methacrylate copolymer (M n =7000,
Yellow toner (6), magenta toner (6), and toner toner (6) were produced in the same manner as in Example 2, except that Mw/Mn = 3, 7, Tg = 64°C).

Comparative Example 4 (i) (ii X1ii) Yellow toner (7), magenta toner (7) and Ant toner (7) was produced.

Comparative Example 5 (1) In Example 1 (1), the pigment was PigmentY.
yellowTRV (C.I., Pigment Ye
Yellow toner (8) was produced in the same manner as in Example 91 except that yellow 83 (manufactured by Dezumi Shiki Co., Ltd.) was used.

(ii) In Example 1(ii), the pigment was MT~1-1
(C.I., Pigment Red 122) was used in the same manner as in Example 1 except that magenta toner (8) was DJaed.

(iii) In Example 1(iii), the pigment was
ogenBlue R (C.I., Pigment B
Ant toner (8) was produced in the same manner as in Example 1, except that lue 60 (manufactured by Toyo Ink Manufacturing Co., Ltd.) was used.

[Manufacture of carrier] Carrier (A) Ferrite coated carrier: average particle size 62μ, electrical resistance 5XIO”Ωcm (100V/cm) as carrier A
shall be.

Carrier (B) Styrene-acrylic copolymer resin (Priolide AC
L, manufactured by Gutdeyer) 100 parts, magnetic powder (Mavico Black 500; manufactured by Methane Industries) 200 parts, carbon black (MA #8 + manufactured by Mitsubishi Chemical Industries, Ltd.) 4 parts, silica (#200; 200 parts Ronol (flavor) (manufactured by )) were mixed in a ball mill and then kneaded with three rolls. The kneaded material was finely pulverized with a pin mill and classified with an air classifier to obtain a carrier (B
) was obtained.

Carrier (C) Polyester resin (softening point 123°C; glass transition point 65
°C) 100 parts, inorganic magnetic powder (manufactured by Toda Kogyo (Madhi), EPT
-1000) 500 parts, carbon black (MA#8;
(manufactured by Mitsubishi Chemical Industries, Ltd.) were thoroughly mixed and pulverized using a Hensinil mixer, and then melted and kneaded using an extrusion kneader set at 160° C. in the no cylinder section and 150° C. in the cylinder section.

After cooling the kneaded material, it was finely pulverized using a jet mill, and then classified using a classifier to obtain magnetic gearia (C
) was obtained.

The powder electrical resistivity of the obtained carrier (C) was 7.08.
x1013Ω·cm. Under the applied magnetic field 10005e of this carrier, the magnetic flux density Bm is 1082G, the amount of magnetization is 45.6 parts mu/g, and the residual magnetization Hc is 217.6G.
Met.

[Method for evaluating toner characteristics] (Amount of charge, amount of scattering) 2.4 g of toner and 27.6 g of carrier (A) were mixed at 50%
, c Put it in a polyethylene bottle and place it on the rotating stand, and put it on the 12Orp.
ms l The amount of charge after stirring for 0 minutes was measured. In addition, the amount of scattering at that time was measured and ranked. A rank of Δ or higher is practically usable, but a rank of 0 or higher is desirable.

Each toner and carrier (A) were mixed at a ratio of 8/92 to prepare a two-component developer. EP using this developer.
-570Z (manufactured by Minolta Camera) was evaluated using a copying machine with an improved oil coating roller type fixing machine.

(Fog on Image) Images were produced using the above-mentioned copying machine in combination with the various toners and carriers. Regarding fog on the image,
Toner fog on white background images was evaluated and ranked. A rank of △ or higher is practically usable, but a rank of 0 or higher is desirable.

(Image density: 1.D) Copying Dataquest's tl chart under appropriate exposure conditions was carried out under the conditions described above, and 1. D. Image quality was evaluated. The 0 degree image of the solid area was measured using a sag 55 degree meter and ranked. A rank of Δ or higher is practically usable, but a rank of 0 or higher is desirable.

(Glossiness) ○: Appropriate glossiness △ Slightly insufficient glossiness × No glossiness Rank Δ or above can be used practically, but O is preferable.

(Fixability) Evaluation was made based on the degree of peeling of the copied image on the paper when the paper was folded and ranked according to the following criteria.

◎; Toner does not peel off and is good. Slightly peels off but is good. × Quite easy to peel. A rank of Δ or higher is usable for practical use, but a rank of 0 or higher is desirable.

(Translucency of OHP notebook) A copy image was fixed on an OHP notebook and projected using an overhead projector for evaluation.

○: Clear color reproduction, good △: Slightly poor color reproduction.

×: The color becomes black and muddy.

Δ: Peeling off but practical. In 5, the amount of charge when carrier B and carrier C are used instead of carrier A is shown below.

When the toner of the present invention is used with any carrier, a good amount of charge can be obtained.

Table 2 (Charge amount of carrier) In addition, Example 1.2 and Comparative Example 5 (i) (ii) (■
Regarding the color toner 1), the chromaticity (color reproducibility) was evaluated by the following method. In other words, a copy of the sunset image on paper (yellow, magenta, cyan, and their combinations of blue, red, and green, a total of six colors) was transferred to a color difference meter CR-100 (manufactured by Minolta Camera Co., Ltd.). It was measured using The light source used was Dll, and the light source color was used. L"a'b'
Evaluation was made using a color system.

As a result, when the toners of Examples 1 and 2 were used,
High electrostatic charge, less scattering inside the copier, 36-color transparency,
It was full of saturation.

On the other hand, in the case of the color toner of Comparative Example 5 (I), the main charge amount is low, there is a lot of scattering in the copying machine, and the image ('Q fog h
It's amazing. Also, in the case of 5(ii), the saturation is low,
I especially remember the color reproducibility of the dark red color.

Charged after continuous copying of 1000 sheets! ! 1 increased and the image density decreased. When color toner 5(iii) is used, the saturation is low and the color appearance is poor. In particular, color
The color reproduction of the dull blue is faithful. Also, after 1,000 continuous copies, the amount of charge or the degree of both images decreased and f2.

[, Ol-IP Preparation of P notebook 1 01 (P-t・(a) Polyester resin (>I n = 4900, Mw /
A 7-talohexanone solution (5%) with Mn = l 4, Tg = 6 pC1 (softening point 87°C) was applied to the surface of a 100 μm thick polyethylene terephthalate film (100 μm thick) and dried to form a coating with a thickness of 2 μIn. formed a layer.

○HP notebook (b) In the production of the old OHP notebook (a), the resin was polyester resin (byron 103 manufactured by Totofusoku (Mai)),
A 2 μm thick coating layer was formed in the same manner except for one layer (softening point: 158° C.).

Regarding the yellow toner (1) of Example 1, 01+P
The fixability of the copied image was evaluated using a notebook (a), an OHP notebook (b), and an unprocessed notebook.

(Bending test) Effect of the invention - 4 The color toner of the present invention has good fixing properties, high image density and gloss, and provides a clear full-color image. Also, 0
) IP translucency is also good and excellent full-color images can be obtained.

Claims (5)

[Claims] (1) A color toner containing a thermoplastic resin, a charge control agent, and a coloring agent, where the thermoplastic resin has the following formula I or II: ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [ I ] ▲ Mathematical formulas, chemical formulas , tables, etc. ▼ [II] [In the formula, R_1 and R_3 are H or CH_3, R_2 is an alkyl group having 1 to 17 carbon atoms or a phenyl group, R_4
means an alkyl group having 1 to 4 carbon atoms] A polymer compound containing one or more monomers represented by the following as a structural unit, and whose number average molecular weight (@M@n) and the weight average molecular weight (@M@w) is the following formula: 6000≦@M@n≦12000 2.0<@M@w/@M@n<3.5, and the pigment is a yellow pigment: C. I. Pigment Yellow 13, and the charge control agent has the following formula: ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [III] [In the formula, R_5 to R_6 are each H or carbon number 1 to 10
A color toner for electrostatic image formation, characterized in that it is a compound represented by the following alkyl group, X^+ is a counter ion and means hydrogen, ammonium, aliphatic ammonium or aromatic ammonium. (2) In the color toner according to claim 1, the pigment is a magenta pigment instead of a yellow pigment: C.I. I. Pigment Red 57:1 color toner. (3) In the color toner according to claim 1, the pigment is a cyan pigment instead of a yellow pigment: C.I. I. A color toner characterized by pigment blue 15:3. (4) A full-color toner kit for electrostatic image formation, comprising the color toner according to claims 1, 2, and 3. (5) A full-color transmission image forming method, which comprises forming an image using the toner according to claim 4 on a transparent film having a coating layer made of a polyester resin having a softening point of 80 to 150°C.