JPS6093453A - Electrophotographic developing color toner - Google Patents

Abstract

PURPOSE:To enable control of spectral transmittance and formation of a sharp image in parts of chromatic pigment by incorporating the chromatic pigment and a UV adsorber each in a binder resin in a specified %, respectively. CONSTITUTION:Tone as a color toner is exhibited by using a chromatic pigment in a binder resin in an amt. of 0.5-15pts.wt. per 100pts.wt. of the binder resin, and the spectral transmittance of 300-450nm of an electrophotographically formed image is reduced to <=25% with a combination with a UV absorber, such as a salicylate type, benzophenone type, benzotriazole type, or cyanoacrylate Ni complex salt type compd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color toner for electrophotography whose forming side is diazocopyable.

Conventionally, when making a multi-image positive print from a manuscript containing drawings and letters, four general-purpose diazo-image machines have been widely used.

This is done by spreading the original on so-called diazo photosensitive paper coated with diazonium salt and using the 3oo~b line, and taking advantage of the property of diazonium salt to cause a photon Jqi reaction, and the Fukumitsu part is a colorless photodecomposition product. The unedited light f5B portion takes advantage of the property that it becomes a blue image in subsequent chemical processing.

For this reason, chromatic colors with high spectral transmittance in the range of 500 to 450 nm (1), especially those using blue, red, and green pigments (1)
In the image area X), a bright image is printed on the positive print, and is generally limited to originals using black pigment.

It is difficult to copy the original copy made by color electrophotography, which has been actively developed and researched in recent years. This amount of oil is equivalent to the Ht
By using process color toners by color combination (so-called Qr, subtractive color method)! When diazo copying is performed using a color copy obtained using m-color (single) can toner, which is used to produce single colors such as red, green, etc., as an original, red and Colors such as green and green have the disadvantage that the 1st and 4th degrees are very small and are of little practical use.

For this reason, when diazo copying is performed using a color copy made by electrophotography as a manuscript, chromatic pigments,
For example, it is necessary to be able to obtain clear images even in blue, red, and green areas in order to improve labor efficiency, and a two-way system was desired.

In order to solve the above-mentioned drawbacks, the present inventor has made efforts to solve the above-mentioned drawbacks.
When the spectral transmittance at 0 to 450 nm is 25% or less,
It was discovered that when diazo copying was performed using this copy as a manuscript, a clear No. 1 print with sharp corners could be obtained, and the following color toner for electrophotography was obtained with a composition composition for this purpose, and the present invention was developed. As a result, the present invention is based on iMf.
,=l 1I7T ll1T 100 M'! ,'
M' 1411, chromatic pigment 0.5 edges 5 layers I
S\1←Hiniku outer layer absorption hsu0.2'-3jlj: f
It is characterized by a spectral voice 11.4 rate of 25% at 300-450r1m, which is formed by combining J and 1 self.
ff, 子'｜Gengen Kagawa Kashi toner available.

Adhesives used in the present application) 9 (The adhesive used in the present application) 9 (The adhesive used in the electronic ear tag development toner is used for the toner used for developing electronic ear tags.) Examples of the ultraviolet-like absorbent used in the present invention include salicylic acid ester threads, benzophenone, benzotriazole, and copolymers of these resins.
Compounds such as cyanoacrylate-based nickel@trisalt-based compounds and proboscises are formed. Still preferable circulation? ! Regarding JAl and abrasion, it is preferable to have a maximum absorption of 1L in the wavelength range of 600 to 450 nm, and to cover as wide a range of 300 to 45 Qnm as possible. Examples of such ultraviolet absorbers include benzophenone-based and benzotriazole-based compounds.Specifically, benzophenone-based compounds include 2-hydroxy-4-benzyloxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 2-hydroxy-4-octoxybenzophenone. 4
-)” Decyloxybenzophenone, 2-hydroxy-
4-octadecyloxybenzophenone, 2.2'-dihydroxy-4-methoxybenzophenone, 2.2'-
dihydroxy-4,4'-dimethoxybenzophenone,
2, 2. '4.4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone, 2-hydroxy-4-methoxy-2'-carboxybenzophenone, 2,2'-dihydroxy-4,
Examples include 47-simethoxy-5-sulfobenzophenone.

In addition, as a benzotriazole compound, 2(2'-
Hydroxy-5'-methylphenyl)benzotriazole, 2 (2'-hi)"
-Hydroxy-3-tert-5-methylphenyl)benzotriazole, 2(2'-hydroxy-6
'5'-ditertiarybutylphenyl)-5-10lopenzotriazole, 2. Examples include (2'-hydroxy-4'-octoxophenyl)benzotriazole.

Among the benzophenone compounds, particularly preferred are 22'-dihydroxy-4-methoxybenzophenone,
22'-dihydroxy-4°4'-dimethoxybenzophenone, 2.2. '4.4'-tetrahydroxybenzophenone is mentioned. In addition, benzotriazole compounds generally have a wide absorption wavelength range, and the above-mentioned benzo) l
) Azole compound's proboscis is used in all cases.

As for the chromatic pigments, there is no problem as long as they are conventionally used in color toners for 1 child photo 1 LIJ, including phthalocyanine type, quinacridone type, condensed azo yarn, indolinone type, and anthracite type. Each of the quinone types 4
・1 Face Nei+ may be used.0 Furthermore, chromatic color ir to be used.
There is no problem in using a mixture of 2 or more stems. 0 Colorful 1! ! When using the pigment, use 0.5 to 15 parts by weight for the sheath layer f1°1Jll100, ii, and the state capital. The state in this range produces the color tone as a color toner, and in combination with an ultraviolet absorber, the spectral transmittance of 600 to 450 weight meters of the image formed by electrophotography becomes 25% or less. It is.

If it is less than 0.5 square parts, the color tone as a color toner will be poor, and if it is more than 15 square parts, the dispersibility of the pigment in the toner will be poor.
This is not preferable because it causes a decrease in the appropriate crushability of the toner.

In addition, even when two or more pigments are mixed together, or when they are used alone, the usage of the ultraviolet absorber can be adjusted between 0.2 and 6M depending on the spectral transmittance of the pigment used in the ultraviolet region of 600 to 450 weight meters. Increase or decrease as appropriate. If the amount of ultraviolet absorber used is less than 0.2 times, it is not desirable because a clear positive image cannot be obtained when copying a 1illii image obtained by electrophotography as a manuscript using a diazo copying method.

Furthermore, in cases where there are more than a portion of triple layers, the toner composition tends to bleed more easily and the pigment tends to aggregate, which is not preferable. In order to improve the diazocopy llζ property, it is not necessary to incorporate three or more functional parts.

161. The color toner for developing electronic photographic tools of the present invention may be produced by a conventional method. At that time, please use the obi as necessary.
l'ij, if'*1 agents, offset inhibitors, etc. may be optionally added.

Examples and examples are described below. Example 1 Add Wg as a chromatic pigment to 100 v parts of styrene resin.
l r”B red azo pigment (C,'I, Picment Red 57:1) 4.5M parts, 2 (2
'-Hydroxy-6'-ter7yarifthylphenyl)-
5-Chlorobenzotriazole and band') a: Mix 6 series of Aburatani dyes as a ta control agent, bath-melt knead with a heated nigu, cool, coarsely crush, and finely crush with a jet mill. Then, it was classified using a classifier to obtain a dotoner with an average particle size of 10 μm.

The ratio of the red toner and gear rear (fluororesin coated iron powder) is 6:97 M: +4. Mix at a ratio of lS,
A red developer with fJH94 band%: button+14μc151- was obtained.

Using the red developer, an electrophotographic image IV of a polyester film of 1v and 75μ was obtained using a dry copying material having a Df cadmium photoreceptor.
Freon gas) was at a constant 7%.

Using this polyester film with a sharp image as an original, a diazo copy image was made using diazo B, and a diazo copy image with high J sharpness and high AT was obtained on the diazo photosensitive paper.

Example 2 100 parts by weight of styrene resin, disazo type i. (C!
．． i. Pigment Yellow 14) 2M parts, quinacridone pigment (C, Technique. Pigment Violet., To1 9)
) Three cylinder needles, 1 part by weight of the same ultraviolet absorber as in Example 1, and 3 parts by weight of oil bath red dye as a charge control agent were mixed and operated in the same manner as in Example 1. A red developer was obtained. Using the red developer,
An electronic page image was created on a polyester film using the same operations as in Example 1, and it was used as a manuscript to print y [Y. Akira rtD
A high diazocopy image of IJ was obtained.

Actual sister example 6 Phthalocyanine blue Mn4-1 (0.1. Pigment Blue 15:3) 4 was added to 100 parts by weight of styrene resin.
Heavy phase tXl ( , dioxazine cyclochromatic face I1. ( C
i. 1. Pigment Violet 23) 0.5 heavy duty department,
2(2'-hydroxy-3', 5
Mix 15 parts of chloropent triazol and 6 parts of residual color pigment as charge control and operate in the same manner as in Example 1. A blue tona and a blue phenomenon Mll were obtained. Using the blue developer, an electrophotographic image was created on a polyester film in the same manner as in Example 1, and this was used as a manuscript to obtain a clear, high-quality diazocopy image.

Example 4 To 100 parts of styrene resin, 2 parts by weight of condensed azo yellow pigment 4 (C, I, Pigment Yellow 95), phthalonanine W color min (c-■).

Pigment Blue 15: 3) 2 parts by weight, 1.5 Mii parts of the same ultraviolet absorber as in Example 6, and
As a frost control agent, a portion of oil-based edge color dyeing was mixed and the same procedure as in Example 1 was carried out to obtain a green toner and a green developer.

Using the green developer, an electrophotographic image was produced on a polyester film in the same manner as in Example 1, and a diazocopy image with high brightness and f-nose was obtained using the entire image as an original.

Reference Example 1 Ultraviolet absorber 2 (2'-hydroxy-
The procedure was the same as Example 1 except that the amount of 6-turnybuterol-5-methylphenyl)-5-chlorobenzotriazole was 0.1 parts by weight.

Reference Example 2 Ultraviolet absorber 2 (2'-hydroxy-
Use of 5-tert-butyl-5-methylphenyl)-5-chloropenttriazole b1 is Q, i 7fj
It is the same as the second embodiment except for the fi section.

Reference Example 6 Ultraviolet absorber 2 (2'-hydroxy-
3-ternyabutyl-5-methylphenyl)-'5-
The procedure was the same as in Example 1 except that the amount of 7 cours (1'lolobenzot') used was 4 fiM parts.

In addition, the obtained color toner is not professional because the ultraviolet absorber bleeds out during storage.

Kinging occurred, and when the developer was used in a dry copying machine in the same manner as in Example 1, the fluidity of the developer 1j11 was poor and a good image quality could not be obtained.

The spectral transmittance of the color toner obtained in each example and reference example was measured using an electrophotographic dry copying machine on a polyester film with a thickness of 75 microns.
A solid area of the electrophotographic image of ~9μ was obtained, and this area was subjected to double-beam spectrophotometric abrasion (manufactured by Hitachi, Ltd., as shown).

The suitability for diazo copying was evaluated using a diazo photosensitive paper with a violet color and a medium printing speed, which is commercially available for general office use, and was evaluated according to the following criteria. The evaluation results are shown in Table 1.

○ 01 is equivalent to a positive print made with a diazo copy using an image formed with black toner as an original.

Δ The 4 dimensions of the lines on the positive print of the diazo copy are too far apart.

× Unable to read the lines on the positive print of the diazo copy.

Table-1 Spectral transmittance and diazo suitability

Claims (2)

[Claims] (1) 100 parts by weight of binder resin, 0.5 to 1 chromatic pigment
A spectral transmittance of 25% at 600 to 45 [] nm, which is made by combining 5 parts of wound and 0.2 to 3 parts of ultraviolet absorber.
A color toner for electrophotographic phenomena characterized by the following: (2) Ultraviolet absorber power: The color toner for electrophotographic development according to claim 1, which is a penzotosoazole compound and/or a benzophenone thread compound.