JPS5957256A - Magenta toner - Google Patents

Abstract

PURPOSE:To obtain a toner having good spectral reflection characteristics, good color mixing property, and high transparency, and superior characteristics of chargeability and durability, by incorporating a specified resin and a combination of 2 specified compds. CONSTITUTION:A resin used as a toner constituent satisifies T1=100-150 deg.C and ¦DELTAT¦=¦T1-T2¦=5-30 deg.C=5-30 deg.C, where T1 is the temp. at which the melt viscosity becomes 10<5>cp, and T2 is the temp. at which that becomes 0.5X10<5>cp. A preferable toner binder resin is exemplified by polystyrene and styrene type resins, vinyl chloride resin, epoxy resin, polyurethane resin, silicone resin, etc., and the compd. to be used are represented by formulae ( I ) and (II) in which X is a substituent represented by formula (III); R1 is H or alkyl; R2 is H, alkyl, OH, phenyl, sulfo, or its alkali metal salt or alkaline earth metal salt; Y is H, halogen, OH, alkyl, sulfo, or its alkali metal salt; and Z1, Z2 are each H, OH, or alkyl, independently.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 7-ton toner for color electrophotography.

Conventional electrophotography method and 17 are American characteristics 1〆 [No. 2297691
No., Special Publication No. 42-23910 and Special Publication No. 43-2
Various methods are described in publications such as No. 4748, but in general, an electrical latent image is formed on a photoreceptor by various means using an IT light guide r[f, and then the electrostatic latent image is formed on a photoreceptor by various means. After developing the latent image with toner and transferring the powder image to paper or the like as necessary, it is fixed by heating, pressure, solvent vapor, or the like. In addition, in order to obtain a multicolor image, the original is exposed to light using a color separation)/f filter, and the above process is repeated several times using black toner such as yellow, magenta, and cyan to create a toner image. This is a superimposed color image.

Such color toners are required to have various characteristics, such as excellent charging properties similar to black toner for black-and-white copying, low environmental dependence, and low deterioration with repeated and continuous use. On the other hand, in addition to the characteristics specific to color toners, the toner must have good spectral reflection characteristics, good color mixing properties, high transparency, etc. 7. Don't trip.

However, the materials that can be used to make the four properties of hue creation = good force τ are limited, and it is not possible to achieve chargeability and durability for continuous use, etc. Currently, there is a constant demand for improvements.

The present invention (d) has been developed in view of the above-mentioned current situation, and its main features are FJ-like IJ1, good spectral reflection characteristics and color mixing properties, and good spectral reflection characteristics and color mixing properties. The purpose of the present invention is to provide a magenta toner having excellent properties 1' and 3. According to the above-mentioned objective e, the temperature when the melt viscosity is 1 (not 16 cP) is '■゛-10,5X lO'c P f: When the temperature is tTt, l'1=100~151)°("
, l j 'J' l = l 'l', -'I'
, 1=5-3 o' (E) and the following general formula (
The compounds represented by 1) and (2) are 0-fi'J'
This is achieved by using a magenta toner that

Bisubstituent represented by Y Z+ OZt; R1 is hydrogen or an azuki group; Rz is hydrogen, an alkino group, a hydroxyl group, a phenyl group, or a substituent (...a hydrogen group, ), a hydrogen group ' atoms, alkyl groups, sulfone groups, or alkali metals thereof, 7 /l/ )) I
J ” Class II metals, ammonium ions, aliphatic ammonium ions, alicyclic nonmonium ions, heteros
Y is hydrogen, halogen atom, hydroxyl group, alkyl group, sulfone group,
or its alkali metals, a) lzkali double-chain metals, phthalocyanine ions, JAR fat jM phmonium imitations;
Alicyclic ammo;-Uno, =I A・n, also fj, any salt with heterologous ammonium ion, Zt+2,
each independently represents hydrogen, a hydroxyl group or a V-7'/L-kit group. ] Below, the constituent components of the toner of the present invention will be explained in I/-), and the important ones in the line (-) are the temperature 'f' when the melt viscosity is to'icp and r. ：'r+
, 0, 5
-1', I'+ Tyl = 5 to 30°C.

When the resin V having these temperature-melt viscosity characteristics is heated, the viscosity decreases to an extremely low temperature (Z). The drop in viscosity like lint causes a suitable mixing sound between the top toner layer and the bottom toner layer, and furthermore, it rapidly increases the transparency of the toner layer itself.
It causes subtractive color mixing.

Toner J, for example, 'r1 is 1 (J (such as 10 or less)) 1 fat ° 2 The used toner easily causes blocking and 2 has shortcomings in storage stability, and furthermore, T, If it is more than l 50 "Q, the color mixing property will be poor and the fixing property will also be difficult.

On the other hand, for toners with 'I'+ = 10 (1~I50'O) whose viscosity changes dramatically in response to temperature changes, such as 1jT140°C, there is a temperature at which moderate color mixing occurs.・However, if the temperature is too high, colors that are more vivid than 11 cannot be reproduced, or if the temperature is relatively low, the glass transition temperature will be low and blocking will occur easily. .

Preferred binder resins for toner include, for example, polystyrene, chloropolystyrene, poly-α-methylmethyone, styrene-chlorostyrene copolymer, styrene-propylene copolymer, styrene-tadiene copolymer, and styrene-chloride. Vinyl copolymer, styrene-vinyl acetate copolymer, styrene-malein nQ co-FR polymer, styrene-acrylic acid ester copolymer, (styrene-methyl acrylate copolymer, styrene-ethyl acrylate copolymer) , styrene-butyl acrylate copolymer, styrene-octyl acrylate copolymer, styrene-phenyl acrylate copolymer, etc.), styrene-methacrylate ester polymer (styrene-butyl methacrylate copolymer, styrene - ethyl methacrylate copolymer, styrene-butyl methacrylate copolymer, methacrylate-methacrylate combined with phenyl, etc.), styrene-α-methyl chloroacrylate copolymer, styrene-acrylonitrile-acrylic acid Styrenic resins such as ester copolymers (
monomers or copolymers containing styrene or styrene 1 recombinant), vinyl chloride resins, styrene-vinyl acetate copolymers, rosin-modified maleic acid resins, phenyl resins, epoxy resins, polyester resins, low molecular weight polyethylene,
There are low molecular weight polypropylene, ionomer resin, polyurethane resin, silicone resin, ketone resin, ethylene-ethyl acrylate copolymer, xylene resin, polyvinyl butyral resin, etc., but the above resins are not only used in China and Germany, but two or more types There are also cars that can be used together.

Moreover, these manufacturing methods are not particularly limited.

Any of bulk polymerization, solution polymerization, emulsion polymerization, and 1% candle polymerization can be used.

In the present invention, the viscosity was measured using a rotational viscometer equipped with a constant temperature bath capable of directly heating the sample and rotor.

Further, among the constituent components of the present invention, important ones are the compounds represented by the above general formulas (1) and (2).

Is compound (1) CI 8o7? vent ILed 4
Classified as 9! In the sign, Aizen lLhod
amine 13 Ba5e, ILhodamin
There are rhodamiy B Ba5e such as eBase FB, but these have extremely good hues and provide sufficient tinting power with occasional use.

Further, as a specific example of compound (2), 1 /\ (J 1 (Ko /\ (I /\ /\ 0 1 ／　＼ ／　＼ 1 ／　＼ (J 1 ／　＼ /\ 1 /\ 1 1 /\ j (s, sa etc. can be mentioned.

When these compounds are used in combination with the specific sesame oil mentioned above, the combined effect is extremely good spectral reflectance and transparency, and when combined with other yellow and cyan toners, for example, they have a wide range of At the same time, it is possible to reproduce clear black colors while exhibiting wide color image development.Furthermore, the combined effect is a significant improvement in the lifespan, a reduction in transfer efficiency, and a reduction in unnecessary toner adhesion to the photosensitive drum. Extremely effective in improving overall electronic properties such as improving anti-+E cleaning properties and improving environmental independence.
, 'b.

To the toner of the present invention, a control agent may be added depending on necessity. - For example, when used as a negative toner, metal gylate of argyl salicylic acid, etc., and when used as an iE toner, l:L,
Dimethylamine ethyl methacrylate tose glenco polymer etc. can be used.

Furthermore, for the developer in which the toner of the present invention is used, a fluidity modifier such as colloidal silica is added to the toner at 0.0%.
1 jba leaf 96~5 layers, preferably 0.1% electric stitching~
It is also possible to add about 2 x 5σ.

The present invention will be specifically explained below using Examples and Comparative Examples. In addition, all the blended parts in the following examples are m cap parts.

[Example 1] After pulverizing Yl together in a ball mill, the mixture was melt-kneaded in a roll mill [7] After cooling, it was coarsely pulverized using a hammer mill, and then finely pulverized using an air jet type pulverizer. The obtained fine powder was classified and 1 to 20 μm was selected, and colloidal silica I*IX was added thereto to prepare a toner.

To 10 parts of this toner, 90 parts of a carrier (reduced iron powder manufactured by Ferrous Powder Co., Ltd.) was mixed and mixed with a developer. Using this developer, NP color copying machine (Gyanon 9η!JL'1)
I made 5,000 copies in a row using the .The copies were 41i without capri, had good spectral reflection characteristics, were dust free, and had a clear magenta color.-! In addition, no cleaning defects occurred.

Furthermore, when copying was performed using a combination of a yellow toner using an azo dye and a cyan toner using a copper-phthalocyanine pigment, clear color images with extremely good color reproducibility were obtained, and the black of the original was even more easily reproduced. The corresponding part is p
l (reproduced in black.

EXAMPLE The same procedure as in Example 1 was carried out except that the toner composition was as described above. After 5,000 continuous copies, the copied images exhibited an extremely clear magenta color with no capri, and no cleaning defects occurred.

Furthermore, when copying a combination of yellow toner using an azo dye and cyan toner using a copper-phthalocyanine pigment, a clear color image with extremely good color reproducibility was obtained, and it was even more similar to the black of the original. The parts that appear have been reproduced in pure black.

[Example 3] Example 1 was carried out in the same manner as in Example 1 except that the toner composition was changed to the above. After 5,000 continuous copies, the copied image exhibited an extremely clear magenta color without capri.

Furthermore, when copying using a combination of yellow toner using an azo dye and cyan toner using a copper-phthalocyanine pigment, a clear color image with extremely good color reproducibility was obtained, and it also corresponded to the black of the original. The parts that appear have been reproduced in pure black.

[Example 4] When a negative latent image on zinc oxide photosensitive paper was developed using the same developer as in Example 1 with the toner composition as above, an extremely clear magenta SZ image was obtained. II Russ 1.

[Comparative Example 1] The same procedure as in Example 1 was carried out except that the toner composition was changed to the above. The copied image was 1lII, which was overall pale and unclear.
I could only get an If image.

[Comparative Example 2] Example 1 was carried out in the same manner as in Example 1 except that the toner composition was changed to the above. However, the copied image had an increased fogging phenomenon of -1t# degree on the back, and only an unclear image was obtained. The phenomenon became even more remarkable after 5,000 copies were made continuously.

[Comparative Example 3] As toner binding resin, T = 148°C; ΔTl = 4
A magenta toner made into a toner in the same manner as in Example 1 except for using a styrene-butadiene resin having a temperature of 8°C, a yellow toner using an azo dye, and a cyan toner using a copper phthalocyanine pigment were combined. When it was copied, the resulting image was only a blurred image with insufficient color mixing.

As explained above, the novel combination of colorant and resin according to the present invention has extremely excellent spectral reflection characteristics, and by superimposing the three colors of yellow toner and cyan toner, it exhibits an intense black color, making it easy to use continuously and in the environment. It was possible to obtain a magenta toner for electrophotography that can maintain a high level of image quality despite changes.

Claims (1)

[Claims] The melt viscosity is 015 CP.
1゜0, 5 x 105 Ck) Volume 71. When h is set to 'l゛, 1'l = 100 to 150
'C, l 1lTl-l'l"t 'l'21 = 5
A mazen i toner containing a resin having a temperature of ~30°C and compounds represented by the following general formulas (1) and (2). Substituent SR represented by hydrogen or alkyl group; R2
is hydrogen, alkyl group, hydroxyl group, phenyl group or substituent (
...Hydrogen group,...Rogen Hara Ryo, alkyl group)
4MJ of a phenol group, a sulfone group or its salt with an alkali metal, alkaline earth metal or ammonium ion, aliphatic ammonium ion, alicyclic ammonium ion, heterocyclic ammonium ion, Y is hydrogen, a halogen atom, a hydroxyl group, an alkyl group, a sulfone group, or its combination with an alkali metal, an alkaline earth metal, an ammonium ion, an aliphatic ammonium ion, an alicyclic ammonium ion, or a heterocyclic ammonium ion. Any of the salts, Z112, each independently represents hydrogen, a hydroxyl group or an alkyl group. ]