JPH01173066A - Photoconductive toner - Google Patents

Abstract

PURPOSE:To obtain a photoconductive toner which exhibits photoconductivity with visible light by incorporating a polymer component having a rhodanine deriv. in the side chain of a chain high polymer. CONSTITUTION:The photoconductive toner is obtd. by incorporating the polymer component having the rhodanine deriv. expressed by formula I into the side chain of the chain high polymer and dispersing or compatabilizing a charge generating material into a fixing resin medium. The polymer has the structure in which the polymer unit having the rhodanine introduced with a the benzylidene group in the 2nd position of the ring is iterated in the side chain. The rhodanine ring part constitutes an electron acceptor and the benzylidene part an electron donor to form an intra-molarcular charge transfer type complex, thereby forming the color. The benzylidene group of the polymer introduces the electron-donating group into the para position to intensify if the electron-donating property of the benzyliene group so that the toner exhibits the excellent photoconductivity in the visible light region. In formula, R1 denotes a lower alkyl group of 1-6C, substd. or unsbustd. aryl group, hydrogen atom, hydroxyl group.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a photoconductive toner, and more particularly to a photoconductive toner having uniform photosensitive properties and coloring properties of each particle.

(Prior art) A typical image forming method applying electrophotographic technology is to visualize an electrostatic latent image formed on a photoreceptor with toner to form a toner image, and then print this toner image on plain paper. Examples include the xerography method, which obtains a copy by transferring the photosensitive material to a transfer material, and the electrofox method, which produces a copy by directly developing the photosensitive material, but all of these methods require a development step. The disadvantage is that the equipment for its implementation is complex and expensive.

To solve this problem, a photoconductive toner is uniformly deposited on a conductive substrate to form a toner layer, and this toner layer is charged and imagewise exposed to charge the photoconductive toner in the exposed area. An image forming method is known in which, after forming an electrostatic latent image by eliminating or weakening the photoconductive toner, only the charged photoconductive toner in the unexposed areas is transferred to a transfer material. The light JtiJ used in this image forming method
A toner is generally a resin fine particle in which a photoconductive substance is dispersed together with a coloring agent in a binder resin, and the photoconductive substance includes inorganic photoconductors such as zinc oxide and selenium, and polyvinyl carbazole (PvC2). ), organic photoconductors such as photoconductive polymers such as hydrazone and low-molecular photoconductive compounds are used. Since these photoconductors have poor photoconductivity to visible light, in practical use sensitizers such as organic dyes and pigments that exhibit photosensitivity and sensitization to visible light are used together with the photoconductors. There is. In this way, photoconductive toner is a fine resin particle that has many functions such as hue, photoconductivity, and photosensitivity.In order to exhibit good development characteristics, each additive must be uniformly dispersed in the binder resin. However, it is necessary to make the characteristics of the surface of each toner particle uniform by making it exist on the toner surface.

(Problems to be Solved by the Invention) However, the components of the colorant, the photoconductor, and the pigment as a sensitizer are finely and uniformly dispersed in the binder resin of each toner particle and are present on the particle surface. It is difficult to
In particular, pigments as sensitizers tend to exist as aggregates in the binder resin, causing fine dispersion, making it difficult to make the development characteristics of individual toner particles constant. Additionally, in the case of photoconductive color toners, the photoconductor and the aggravating agent cause the toner to have a poor hue, resulting in images that lack vividness.

Therefore, an object of the present invention is to provide a photoconductive toner that exhibits photoconductivity in visible light without containing a carrier-generating pigment as an aggravating agent.

Another object of the present invention is to provide a photoconductive toner comprising as few components as possible and having uniform photosensitive characteristics of each particle.

Another object of the present invention is to provide a photoconductive color toner with a vivid hue.

(Means and effects for solving the problem) (1) A rhodanine derivative of the following structural formula is regularly added to the side chain of a chain polymer (in the formula, R is a lower alkyl group having 1 to 6 carbon atoms, a substituted or The above-mentioned problems can be solved by dispersing or dissolving a charge generating material in a fixing resin medium containing a polymer component having an unsubstituted aryl group, hydrogen atom, or hydroxyl group to obtain a photoconductive toner. The object of the present invention is achieved.

The polymer of the present invention has a structure in which polymerized units having rhodanine in which a benzylidene group is introduced at the 5-position of the ring are repeated in the side chain. And the rhodanine ring is an electron acceptor,
The benzylidene moiety acts as an electron donor to form an intramolecular charge-transfer type complex to generate color, and photocarriers are generated by this photoexcitation.

In particular, in the polymer according to the present invention, by introducing an electron-donating group into the para-position of the benzylidene group, the electron-donating property of the benzylidene group is strengthened, and light absorption occurs in the visible light region, making it necessary to add an exacerbating agent. It exhibits excellent photoconductivity in the visible light range.

As mentioned above, the polymer of the present invention has good photoconductivity because it regularly has polymerized units containing a rhodanine derivative. By simply doing this, a photoconductive toner whose individual particles have uniform photosensitive properties can be obtained.

Further, the polymer of the present invention itself exhibits a bright red color, and a photoconductive color toner can be obtained without containing a colorant.

(Preferred response to the invention) The rhodanine derivative used in the present invention has the following general formula, S (where B is a reactive substituent, (C) is a divalent organic group, and R3 is a lower alkyl group or a hydroxyl group. , P represents O or 1). Examples of (C) include alkylene groups having 4 or less carbon atoms, arylene groups such as phenylene groups, and carbonyloxyalkylene groups such as carbonyloxyethyl and carbonyloxypropyl groups. Examples of alkyl groups for R1 include lower alkyl groups such as methyl, ethyl, propyl, butyl, pentyl, and hexyl groups, and examples of aryl groups that may have substituents include phenyl, naphthyl, anthryl, and phenanthryl. , fluorenyl, etc., and examples of substituents include lower alkyl groups having 1 to 4 carbon atoms, alkoxy groups such as methoxy, ethoxy, and propoxy, amino groups, and alkylamino groups such as dimethylamino, diethylamino, and dipropylamino groups; An example is a halogen atom. Specifically, it can be raised.

As shown in the above specific example, the reactive Xta group B is -
Examples include COOH-CHtCl-OB-COCI-MHI.

These rhodanine derivatives can be synthesized by various methods, such as the following reaction formula.

(In the formula, B, (C), p and R1 are the same as above) That is, the rhodanine derivative is 3-substituted rhodanine and 2-β-7
It can be obtained by reacting cetanilide vinylbenzthiazole alkyl iodide in alcohol.

In order to obtain a polymer having rhodanine derivatives regularly in side chains, in particular, the radically polymerizable monomer to which the rhodanine cup conductor is bonded is polymerized in the presence of a radical initiator. can be generated.

- And, as a radically polymerizable monomer having a substituent having reactivity with the rhodanine derivative to become a radically polymerizable monomer to which the rhodanine derivative is bonded, for example, the following general formula is used. An ophthalmic monomer represented by CH2=CH (CHz)-Ht (in the formula, m represents an integer of 0 to 3), the following general formula, C)('2=CH (in the formula, R2 is - CHzC1, NHz, -3O2CI,
A styrenic monomer represented by the following general formula: CH,=CCH,=C 艮CooH, ,COCI CH,=CCH2工Cc=oc=.

(CH2), NH2OH (in the formula, R3 represents a hydrogen atom and a methyl group, and m is the same as above).

The reaction between the monomer and the rhodanine derivative is achieved, for example, by the following reaction formula.

Azo compounds such as azobisisobutylnitrile, benzoyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide, peroxide, etc. in solvents such as benzene, dimethylbormamide, and dimethylmethane. It can be easily polymerized by heating in the presence of a radical initiator such as a peroxide such as lauroyl oxide.

The radical initiator concentration is preferably from 0.1% to 10% by weight based on the monomer charged. The polymerization temperature varies depending on the type of radical initiator used, but is usually 20 to
100°C is preferred. Further, the polymerization time is preferably 1 to 50 hours. The weight average molecular weight of the obtained polymer can be adjusted within a wide range of 10,000 to 40,000 by selecting the monomer concentration, radical initiator concentration, and polymerization temperature.

The resin medium for fixing in which the above polymer is blended is as follows:
The resins used in the manufacturing method of this type of toner are used,
Particularly preferred are various mono- or diethylenically unsaturated monomers, especially (a) vinyl aromatic monomers, (
b) Homopolymers and copolymers of acrylic monomers are used.

Examples of the monomer (a) above include styrene, vinyltoluene, α-methylstyrene, α-chlorostyrene, vinylxylene, vinylnaphthalene, etc.
Monomers (b) include methacrylic acid, ethyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate,
2-ethylhexyl methacrylate, 3-hydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 3-aminopropyl acrylate, 3-N,N-
Examples include diethylaminopropyl acrylate and acrylamide.

Other monomers used in combination with these monomers (a) or (b) or alone include butadiene,
In addition to isoprene, chloroprene, etc., maleic anhydride,
Other ethylenically unsaturated carboxylic acids or their esters such as fumaric acid, crotonic acid, itaconic acid, vinyl esters such as vinyl acetate, vinylpyridine, vinylpyrrolidone, vinyl ethers, acrylonitrile, vinyl chloride, vinylidene chloride, etc. can be mentioned. The molecular weight of these resins is 3,000 to 300,000, especially 5
．． Preferably, it is in the range of 000 to 200,000.

The amount of the above-mentioned polymer of the present invention is 50 to 200% per fixing resin medium. By using a certain amount, a toner with excellent photoconductivity, photoconductivity, and fixing properties can be obtained.

Furthermore, the polymer of the present invention can be directly contained in the fixing resin medium by copolymerizing the radically polymerizable monomer having the rhodanine derivative described above with the monomer serving as the fixing resin medium.

Further, when the toner is a heat fixable toner, the softening point of the polymer is 50 to 200°C, preferably 70 to 200°C.
One having a temperature of 170°C is preferred.

In order to increase the photoconductivity in visible light, a charge transporting material may be used together with the polymer of the present invention, and as the charge transporting material, known electron transporting substances and hole transporting substances can be used. can. Specifically, electron-accepting substances having an electron-accepting group such as a nitro group, a nitroso group, or a cyano group;
For example, fluorenone compounds such as tetracyanoethylene, 2,4.7-)Lielow-9 fluorenone, nitro compounds such as dinitroanthracene and 2,4.8-trinidrothioxanthone; electron-donating substances such as N, N
-Diethylaminobenzaldehyde N,N-diphenylhydrazone, N-methyl-3-carbazolaldehyde N,N-diphenylhydrazone and other hydrazone compounds, 2.5-di(4-N,N-dimethylaminophenyl)-1゜3 .4-oxadiazole, 2,5-di(4-
N.

Oxadiazole compounds such as N-diethylaminophenyl)-1,3,4-oxadiazole, schel compounds such as 9-(4-dimethylamistyryl)anthracene, carbazole compounds such as N-ethylcarbazole, Phenyl-3-3(4-dimethylaminophenyl)pyrazoline, 1-phenyl-3-(4-dimethylaminostyryl)-5-(4-dimethylaminophenyl)pyrapurine, 1-phenyl-3-(4-diethylaminostyryl) Pyrazoline compounds such as ``)-5-(4-diethylaminophenyl)pyrazoline, oxacin compounds such as 2-(4-diethylaminophenyl'')-4-(4-dimethylaminophenyl)-5-(2-chlorophenyl)oxazole compound, isoxazole compound, 2-(4
thiazole compounds such as -diethylaminostyryl)-6-dinithylaminobenzothiazole, triphenylamine, 4,4-bis(N-(3-methylphenyl)-N
- Amine derivatives such as phenylaminocobiphenyl, nitrogen-containing cyclic compounds such as stilbene compounds, thiadiazole compounds, imidazole compounds, pyrazole compounds, indole compounds, and triazole compounds, condensed polyesters such as anthracene, pyrene, and phenanthrene. cyclic compounds, poly-N-vinylcarbazole, polypropylene,
Examples include polyvinylanthracene and ethylcarbazole-formaldehyde resin. The above charge transport material is
One or more kinds of them are used, and they are added to the polymer in consideration of the fixability and cohesiveness of the toner, and are used in an amount of 20 to 50 parts by weight, preferably 30 to 40 parts by weight, per 100 parts by weight of the polymer.

In addition, examples of colorants that color the photoconductive toner black or other hues include carbon blank, lamp black (C, 1, No. 77266), and chrome yellow.
(C, 1, No, 14090), Hansa Yellow (C,
I, tJo, 11660.11680, etc.), benzidine yellow (C, 1, No.

21100 etc.), Suren Yellow G (C, 1, No. 7)
0600), quinoline o-(C,1,No,47
005), Permanent Orange GTR (C, 1, No.
, 12305), Plasticine Orange (C, 1, No.
21160), Watch Young Red (C, 1, No.

15868), permanent red (C, T, No. 1)
2310 etc.), brilliant carmine 3B (C, 1, N
o, 16105), brilliant carmine 6B (C, 1
, No. 15850), DuPont Oil Red (C, 1
, No. 26105), Pyrazolone Red (C.

1, No. 21120), Lysole Red (C, 1, N
o, 15630), Rhodamine B Lake (C, 1, N
o, 45170), Lake Red C (C, 1, No.
45435), Aniline Blue (C, 1, No.

77103), Calco Oil Blue (C, 1, No, a
zoec Blue3), methylene blue chloride (
C, 1, No. 52015), Phthalocyanine Blue (
C,1, No. 74260), malachide green oxalate (C,1, No. 42000), etc., or nigrosine dye, Spiron black, etc., C,1,S.

1vent Yellow 60, C, 1,5olv
ent Red 27, C, 1, S.

1vent Blue 35, C, 1,5olven
t Green 15, C, 1, S.

Examples include oil-soluble dyes such as 1vent Brown 5, and oil-soluble dyes are particularly preferred from the viewpoint of photoconductivity and colorability.

These colorants may be used singly or in combination of two or more, for example, 1 to 30 parts by weight, preferably 2 to 20 parts by weight, per 100 parts by weight of the binder resin.

In addition, in order to control the charge of the toner as necessary, the above-mentioned toner may contain a charge control agent such as nigrosine dye (C3I, No. 50415B) as another additive.
, oil black (C, 1, No. 26150), oil-soluble dyes such as spirone black, naphthenic acid, salicylic acid, octylic acid, fatty acids mentioned below, resin acids such as manganese, iron,
Metal soaps that are metal salts of cobalt, lead, zinc, cerium, calcium, nickel, etc. or metal-containing azo dyes,
The binder resin may contain 0.01 to 5% by weight of a pyrimidine compound, alkylsalicylic acid metal chelate, etc.

In addition, in order to prevent the toner from adhering to the fixing roller, the toner may contain an anti-offset agent, such as various waxes such as low molecular weight polypropylene, low molecular weight polyethylene, and paraffin wax, and olefin monomers having 4 or more carbon atoms. Furthermore, in order to improve the fluidity of the toner, if necessary, the toner may be surface treated with external additives such as silane coupling agents, silicone, and fluorine compounds. You may go.

In addition, the method for producing the photoconductive toner of the present invention includes mixing and kneading a chain polymer having a rhodanine derivative in its side chain, a charge transporting material, and, if necessary, a colorant and other additives. Then, pulverize it. Alternatively, a toner having a particle size of 5 to 50 μm is produced by mixing and dispersing the mixture in a suitable solvent and spray-drying the resulting solution.

For image formation using the toner of the present invention, in addition to metal plates such as aluminum plates and tin plates and drums thereof, transparent conductive substrates such as Nesa glass are used. Any means known per se can be used to form the toner phase on the substrate, for example by mixing the toner composition described above with a magnetic carrier to form a two-component composition, which The magnetic brush is supplied onto a sleeve having a magnet therein, and the magnetic brush rubs against the conductive substrate to form a toner layer on the substrate. Further, the charged toner is supported on a Noah brush, and the conductive substrate is rubbed with the brush, thereby forming a toner layer on the substrate. In this case, if a bias voltage is applied between the conductive substrate and the sleeve or fan-filled brush, the toner layer can be formed more easily.

The toner layer formed on the conductive substrate has already been charged itself, but if necessary, it may be forcibly charged using a corotron or the like. The thickness of the toner layer is such that toner particles are formed in one layer or several layers, and the coating amount is generally 8 to 50 g/m'' in terms of weight per unit area.

Image exposure includes uniform exposure of the entire surface using a flash lamp,
This can be performed by slit exposure using a halogen lamp or the like. The exposure amount varies greatly depending on the sensitivity of the photoconductive toner, but is generally between 50 and 2001 ux-se.
The range c is the mortgage.

As the transfer means, corona discharge transfer or roller electrode transfer, which are known per se, can be used, and the fixing operation can be performed using a pressure roller with a built-in heater or an oven heater, which are known per se.

Generally, a suitable fixing temperature is in the range of 160 to 200 t.

The present invention will be explained below with reference to Examples.

(Example 1) [Synthesis of rhodanine] Synthesis of 3-carboxymethyl-5-(2-(3-ethylbenzthiazoline)dimethine)rhodanine 19.1 g of 3-carboxymethylrhodanine and 2-β
46.6 g of -acetanilide vinylbenzthiazole ethiodide and 12.1 g of ethylamine were refluxed in ethanol for 930 minutes, and the product was recrystallized from pyridine to obtain the above compound (yield: 45%).

[Synthesis of monomer having rhodanine derivative] 15.2 g of P-chloromethylstyrene and the 3-hydroxymethyl-5-(2-(3-ethylbenzthiazoline) obtained above)
Dimetine] rhodanine 35g and triethylamine 12m
1 was dissolved in 100ml of dimethylformamide, and 90ml of dimethylformamide was added.
React at ℃ for 3 hours.

After the reaction, the reaction solution was poured into water, the resulting precipitate was washed with water, and recrystallized with acetone to obtain the above monomer.

[Solution polymerization]

Add α to 3.6 g of the monomer obtained above as a polymerization initiator.
, 6 mg of α゛-azobisisobutyronitrile and 5 ml of tetrahydrofuran as a solvent were added, the above mixture was dissolved and sufficiently dispersed, and then charged into a polymerization tube and degassed several times to seal the tube and create an ampoule in a vacuum state. It was created. This was reacted for 300 hours in a constant temperature bath at 60° C. to obtain 3.4 g of the polymer of the present invention.

[Manufacture of toner]

Thoroughly mix and disperse a solution consisting of 100 parts by weight of a styrene-acrylic copolymer as a fixing resin, 90 parts by weight of polystyrene having the rhodanine derivative obtained above in its side chain, 2500 parts by weight of toluene and 500 parts by weight of THF as a solvent, A photoconductive toner having a center particle of 12 μm was obtained by a spray drying method. This toner is photosensitive to green light around 530 nm. Next, the toner obtained above was mixed with an electrophotographic carrier (ferrite carrier, average particle size: 80 μm) and negatively charged (toner concentration: 8%). When this toner was deposited on an aluminum substrate and an image was formed using green light, a bright red image was obtained with no missing characters and no background fog.

(Example 2) 100 parts by weight of the polymer having the rhodanine derivative in the side chain obtained in Example 1, 100 parts by weight of styrene-acrylic copolymer, and 30 parts by weight of 4-diethylaminobenzaldehyde 1,2-diphenylhydrazone as a charge transport material. part, Spiro weight rack 20 parts, toluene 250 part as solvent
A solution consisting of 0 parts by weight and 50 parts by weight of T)IF was thoroughly mixed, and a photoconductive toner having a center particle size of 10 μm was obtained by spray drying.

The above-obtained toner and electrophotographic carrier (ferrite carrier, average particle size 80 μm). This toner was deposited on an aluminum substrate and imagewise exposed to white light to obtain a black toner image corresponding to the original image. The obtained image was clear with no background capri.

(Example 3) [Synthesis of rhodanine] Synthesis of 3-amino-5-(2-(3-ethylbenzthiazoline)dimethine)rhodanine 3-aminorhodanine 1
8.3 g and 45.2 g of 2-β-acetanilide vinylbenzthiazole ethiodide,) ethylamine 12
．． The above compound was obtained by refluxing 1 g in ethanol for 30 minutes and recrystallizing the product from pyridine.

[Synthesis of monomer having rhodanine derivative] 10.5 g of methacrylic acid chloride and 3-amino-5 obtained above
-(2-(3-Ethylbenzthiazoline)dimethine) 30.4 g of rhodanine are reacted with 100 ml of dimethylformamide at 0° C. for 3 hours.

After the reaction, the reaction solution was poured into water, the resulting precipitate was washed with water, and recrystallized with acetone to obtain the above monomer.

[Solution polymerization]

Add α to 3.6 g of the monomer obtained above as a polymerization initiator.
, 6 mg of α”-azobisisobutyronitrile
5 ml of tetrahydrofuran was added as a solvent to dissolve and sufficiently disperse the above mixture, and then the mixture was charged into a polymerization tube and degassed several times to seal the tube and create an ampoule in a vacuum state.

This was reacted for 300 hours in a constant temperature bath at 60° C. to obtain 3.4 g of the polymer of the present invention.

[Manufacture of toner]

A solution consisting of 100 parts by weight of a styrene-acrylic copolymer as a fixing resin, 100 parts by weight of polymethacrylic acid chloride having the rhodanine derivative obtained above in its side chain, 2500 parts by weight of toluene and 500 parts by weight of THE as a solvent was thoroughly mixed. A photoconductive toner having a center particle of 11 μm was obtained by dispersing and spray drying. This toner is 53
This toner is sensitive to green light around 0 nm. Next, the toner obtained above was mixed with an electrophotographic carrier (ferrite carrier, average particle size: 80 μm) and negatively charged (toner concentration: 8%). When this toner was deposited on an aluminum substrate and an image was formed using green light, a bright red image was obtained with no missing characters and no background fog.

(Example 4) [Synthesis of rhodanine] 3-(P-chloromethylphenyl) -5- (2-(
Synthesis of 3-ethylbenzothiazoline)dimethine]rhodanine 3-(P-chloromethylphenyl)rhodanine 19,3
g and 18.3 g of 2-β-acetanilide vinylbenzthiazole ethiodide were reacted in DMF at 100°C. After 3 hours, the reaction solution was added to water, and the resulting precipitate was washed with water and then recrystallized with acetone to obtain the above compound.

[Synthesis of monomer having rhodanine derivative] 8.5 g of methacrylic a and 39.5 g of 3-amino-5-(P-ethylbenzylidene) rhodanine obtained above were mixed with 100 g of dimethylformamide dissolved in 12 ml of triethylamine.
ml and reacted at 100°C for 3 hours.

After the reaction, the reaction solution was poured into methanol, and the resulting precipitate was reprecipitated with THF/methanol and dried under reduced pressure to obtain the above monomer.

[Solution polymerization] Add α as a polymerization initiator to 3.8 g of the monomer obtained above.
, 6 mg of α°-azobisisobutyronitrile and 5 ml of tetrahydrofuran as an i-container were added, and the above mixture was dissolved and sufficiently dispersed. Then, the ampoule was charged into a polymerization tube and degassed several times to seal the tube and create a vacuum. It was created. This was reacted for 30 hours in a constant temperature bath at 60° C. to obtain 3.4 g of the polymer of the present invention.

(Production of toner) 100 parts by weight of a styrene-acrylic copolymer as a fixing resin, 110 parts by weight of polymethacrylic acid chloride having the rhodanine derivative obtained above in its side chain, and 1.2 parts by weight of 4-diethylaminobenzaldehyde as a charge transport material. 20 parts by weight of diphenylhydrazone, 25 parts by weight of toluene as a solvent
Thoroughly mix and disperse a solution consisting of 000 parts of
A photoconductive toner of m was obtained. This toner is photosensitive to blue light around 480 nm.

Next, the toner obtained above was mixed with an electrophotographic carrier (ferrite carrier, average particle size: 80 pm) and negatively charged (toner concentration: 8%). When this toner was deposited on an aluminum substrate and an image was formed using green light, a bright red image was obtained with no missing characters and no background fog.

(Effects of the Invention) As is clear from the above examples, the photoconductive toner obtained according to the present invention does not contain any exacerbating agent and exhibits excellent photoconductivity in the visible light region. A photoconductive toner is obtained with the constituent materials, and each additive in the toner -
This enables various dispersion and makes the characteristics of each toner particle uniform. Therefore, a clear image without background fog can be obtained during image formation.

Further, since the binder resin is a photoconductor and does not turn bright red, a photoconductive red toner with excellent translucency can be obtained without containing a colorant.

Claims (2)

[Claims] (1) Rhodanine derivatives with the following structural formula are regularly distributed on the side chains of chain polymers ▲ Numerical formulas, chemical formulas, tables, etc. A photoconductive toner comprising a polymer component having an aryl group, a hydrogen atom, or a hydroxyl group. (2) 1 charge transport material per 100 parts by weight of fixing resin
The photoconductive toner according to claim 1, wherein the photoconductive toner is used in an amount of 0 to 50 parts by weight.