JPS59147355A - Printing plate for electrophotographic mechanical process - Google Patents

Abstract

PURPOSE:To obtain a printing plate high in stability in printing operation and superior in printing resistance by using a specified org. compd. as an org. photoconductor. CONSTITUTION:A printing plate for electrophotographic mechanical process obtained by forming on a conductive substrate a layer contg. an alkali-soluble resin, such as styrene-maleic anhydride, and an org. photoconductor represented by formula I in which R1 is methyl, ethyl, or 2-chloroethyl; R2 is methyl, ethyl, benzyl, or phenyl; and R3 is H, Cl, Br, 1-4C alkyl, 1-4C alkoxy, dialkylamino, or nitro; such as formula II or III. As a result, the obtained printing plate is effectively functions for various kinds of electrophotographic mechanical processes and has extremely high printing resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel printing plate that can be made by Shigeko's photography method. More specifically, the electrostatic latent image obtained by charging with a new printing plate containing a specific photo-4-electroelectric substance is then developed with a 1-ner and fixed with 1- By dissolving and removing the photosensitive layer in the non-image area after tltting the color image! Q Regarding the printing version.

Indigo rice-1 Traditionally, photosensitive resins have been used as master plates for lithographic printing.

It is known that a silver halide photosensitive material is used.

However, although lithographic printing plates using photosensitive resins have high printing durability, they have low sensitivity. Another drawback is that there are 8 steps required to create a positive, which requires extensive equipment and takes a long time to make the plate.

In addition, diffusion transfer development of silver halide sensitive S'c materials and f
The printing version by type 7 is 9419.
1-11 edition Q7. However, it has the drawbacks of low printing durability and high cost per sheet.

For example, as a printing jyi for tie-left plate making using the method, there is
10゜Special Public Showa 4 R-'l OOO2, Special Public Showa/18-
18325, Special Publication Showa 5+-15766, Special Publication No. 51-2
57, there are nine known zinc oxide-resin jW printing plates as shown in I'=-'7. This printing plate is made by forming images from 1 to 2 using the electronic method.
In order to make the non-image area hydrophilic, it is treated with an acid solution containing ferrocyanate, for example. The printing plate made in this way is subjected to 1 L of mechanical pressure during printing. 'd, The permeation of L water into the sensitive layer and the conductive treatment layer causes peeling, and the poor parent layer is destroyed, so the printing durability is 5.000 to 10. 0
The number of sheets was about 00... ll One purpose of the present invention is to apply various electrophotographic processes,
A new type of printing that works effectively and has extremely high printing durability)
V to t! A. It's about providing.

The present invention - As a result of studying a printing plate having a layer consisting of various photoconductive compounds and an alkali-soluble resin, it was found that a photoconductive compound using the photoconductive compound represented by the following general formula, The purpose has been achieved, and I have expressed my desire to do so.

- (That is, the present invention provides a printing plate for electrophotolithography having a layer containing an organic photoconductive compound and an alkali-soluble resin on a conductive support, as an organic leading conductive compound,
An electrophotographic 11V printing plate characterized by using a compound represented by the following general formula is provided for tW.

[In the formula, R1 represents a methyl group, ethyl group or 2-chloroethyl group, R2 represents a methyl group, ethyl group, hensyl group or phenyl group, and R3 represents hydrogen, chlorine, bromine, carbon number 1 to /I represents an alkyl group, a 1-1 alkoxy group, a dialkylamino Il group, or a 21-ro group. ] +: The photoconductive compound represented by the above general formula used in Brahma is described in JP-A-55-15695/1't; all of which are incorporated into the present invention) It is something that can be done. A specific compound is the following compound 1j.

(Hereinafter, 1. Margin) The alkali-soluble resin used for wood stain refers to a resin that becomes soluble in an aqueous or alcohol+1 solvent by adding an alkali. For the purpose of the present invention, these resins have properties such as film-forming properties, electrical properties, adhesion strength to a support, and in particular, solubility properties of 11'fj.

Examples of resins having such properties include styrene/maleic anhydride copolymers, styrene/methacrylic acid/methacrylate-1-4+ polymers, tutaacrylic acid/methacrylate copolymers, and phenolic resins. Illustrated. Examples of phenolic resins include phenol and 0-cresol.

rfl-cresol, p-cresol, ethylphenol, isopropylphenol, t-phthylphenol,
t-amylphenol, hexylphenol, t-octylphenol, cyclohexylphenol, 3-methyl-4-chloro-6-t-phthylphenol, isopropylcresol, -butylcresol, t-amylcresol, hexylcresol, [-octylphenol] 11 by condensing at least one substituted phenol such as cresol and cyclohexyl cresol with an altehyde such as formaltehyde, ace1-aldehyde, acrolein, crotonaltehyde, and furfural under acidic conditions.
') is used.

In the electrophotographic printing plate of the present invention, dyes (enhancing agents or chemical sensitizers) may be used.

Examples of dye sensitizers include Furilian 1~Clean, Hictoria Blue B, Methyl Pioreso 1~. Crystal Violen 1~. Rhodamine B, rhocumin [7B
, rotamine G extract 1-la, sulforhodamine B, fas 1-asic 1-eosin G, loin bengal, fluorescein, methylene blue.

Acridine Yellow, Acridine Orange, 1-Lipaflavin, Cryptocyanin, Alizarin, As1-Lason Yellow 3G, Basic Yellow 52115, As1-Lauan Orange R, Malachite Green, etc. are used.

Examples of chemical sensitizers include quinones such as p-pentuquinone and chloranil, and 4-nido[1/-n-
), 2-naphenyl, anthracene-9-aldehyde, etc. Phenolucic acid. Kumamoto M4 such as maleic acid and no pepthalic acid.
The analogy is pensophenone bensoin. Examples include carbons such as 9-acetyl-7-helacene, -(i-isosulfate), and halogenated boron compounds.

In addition, the printing version of this book contains a plasticizer. For example, dimethyl phthalate, ethyl phthalate 1 ~, siftyl phthalate - 1-corner phthalate ester, dimethyl phthalate 1-luphthalate, etc.
No. 1~, ethyl phthalyl ethyl glyco I-1, corner nolicol esters, etc. are effective. 1J1 can be contained within a range that does not cause deterioration. 1 4.2 The conductive substrate used in the invention can be treated as aluminum, aluminum plate, or copper-aluminum TFF.
, copper-], ] stainless steel plate, chrome-copper, etc., (metal plate, or black t1-copper-aluminum 11 plate.

A conductive substrate having a hydrophilic surface such as a tri-metal material such as a chromium-lead-iron plate or a chromium-lead-stainless steel plate is used, and its thickness is O. - 1 mm is fine.

(Left below) Also, in particular, II of the support having a surface of aluminum 15
) In the case of 6′ 11 stand-up treatment 11 , silicic acid 1-liu 12° fluorochloride potassium disilconium 15ate, phosphate etc., ・mu 8 treatment or anodizing treatment etc. (1) It is preferable that the surface has been treated with 111. 1~Liu T, 111 years old aluminum temporary soaked in aqueous solution, also JP-A-47-51: 5 moderator +1
It is also preferable to carry out an anodic oxidation treatment as shown in ] and then immersion treatment in an aqueous solution of an alkali metal silicate.

Tokiyo I! ! Examples of acids include inorganic acids such as phosphoric acid, chromic acid, sulfuric acid, and boric acid, or oxalic acid.

How many acids such as sulfamic acid or their salts are mixed in a constant angle V solution with a volume of 11 or 1-1, and 71 parts of aluminum is mixed with 10 parts of aluminum? This is carried out by passing a current as j.

In addition, in the case of the conductive J1 (kari and y
Casein, polyhinyl alcohol, ethyl cellulose, phenolic resin with 6 conductors and 71 m, 8 layers between layers.

Suchi 1. ·hmm,/ :'! ! ': Treatment of alkali-compatible intermediate layers such as heptamaleic acid copolymer and polyacrylic acid, and modification of the adhesion of the monolayer or the electrostatic properties of the photoconductive layer. It can be set up for the purpose of

In order to produce the electrophotographic printing plate 111 of the present invention, a conductive compound represented by the above general formula, the alkali-soluble resin, the white sensitizer, etc. Add an additive 1 to Luen, Te 1 Herahi 1 -Lohran, ethylenx Recall Seven Noethyl Ether, Methyl Ethylke I ~.

The IkI halide is dissolved in an arsenic solvent such as ethyl acetate, coated on the conductive substrate, and dried.

The light guiding layer should have a thickness of 1 to 30 microns, preferably 2 to 15 microns. The proportion of the photoconductive polymeric compound in the photoconductive layer is suitably 10 to 60%.

The printing plate of the present invention can be used as an ordinary electronic photoprinter! , charged by c method?
Exposure is carried out using a Ti source such as a halogen lamp, a tank lamp, a fluorescent lamp, or an Alcon laser, and then 11'11. Save f and ↑f the 1 Henner statue.

Current P! +I heat and fix with a heat roller, heat wire, etc. Next, 7 volumes of sodium silicate solution, 1~1 volume of phosphoric acid
Rium 7I near guest f ('j nato's alkaline water 7 volumes 1]
ν, or an organic amine such as an alkaline salt or ethanolamine, a solvent, or a mixture thereof. part).

〆5. The image area (toner f=
Is it possible to obtain a good printing plate by remaining on the 2S side of the 1st part)? 1ν can be processed by using a W surface activator.

In addition, the printing plate of the present invention has the following feature: after the toner curve is formed, the entire surface is exposed to y.
6, it is possible to increase the solubility of the layer in a 1-1 manner, and to include quinone diacyl (arsenide) such as 0 to naph1 to kyldiazide.

The printing plate of the present invention, which is plated by the h method such as 1 (, 1 < nM), has high stability during printing and has excellent printing durability. Further, the photosensitive layer of the printing plate of the present invention is purine 1-1ζ
Self-thread V (Anti IIσif!j l2 can also be used.

Hereinafter, F17 will be specifically explained using an embodiment of the present invention.

Example 1 (No. 5) ■Conductivity/1'1 Compound 10 + ζ Styrene/No 4 Malenic acid (intermediate 0.5 g Rotamint 13 180 g Te1~Rahitorofuran 1-T oil) , K sand [1 mafed and 11 fatty acid oxidized Kurukawa 1 thickness 0,25 + mn alumina 15↑J2 was coated using a wire bar, 100
Dry for 20 minutes at °C for approximately ¥5/J 17)
A printing plate with a photosensitive layer was prepared. This printing plate was charged to approximately -'l OOV by corona discharge, imagewise exposed using a plate-making camera using a halogen lamp as a light source, and then charged to Il OOV with a 1-ner.
i', i! ! ξ and fixed, 1 henna statue is in the evening. Next, the sample II was immersed in a solution of 1% 1-lium silicate for 1 minute, and then washed with a gentle flange in a main stream. As shown in step 2, the printing plate with the square image (qH part removed and dried) is applied to an offset printing machine,
t) I'l (1) Good r na Frl print wo 111
is.

(No. 7) Light-guiding polymeric compound 10g Stycynone/Bonless maleic acid copolymer 0.5+r Asl~
Lason orenshi R180I? 7 (', -, 7! ξ, or sand l'), and ceric acid (2) applied to an old aluminum plate. , a printing plate having a thickness of about 5μ and having a sensitivity n B'j was prepared.This printing plate 111) was charged with about -100\7.11V by corona discharge (f,, I Om W
Exposure at 488 nm using an Alcon laser) +
Develop with 6th, 1st, and fix to create 1~ner image? (T41) Next, t'j, which removed the non-image area in the same way as in the actual Jjili example j, was multiplied by offset printing 1 and 100,000
11 good 1゛11 prints of 0 + γ 1! Ten.

(1/Margin) The light of (No, I)! 8 H city contains 1 compound 10g Methyl methacrylate-1-(8 (1%)
'1. ) +l:r1′T combination F11 ,5 ,,
Rotamine F'[' (1, 80g The photosensitive layer was formed using the above solution.
Proceed in the same manner as Example 1, and print 100,000 sheets in good condition (N O, 3+ sotHitm ? 1 yen +'lf
Example 2 except that the layer 7 was formed using 10 g of 2 compound - cresol fort, altehyde resin, 0.5 g of Astrason Orenshi, 180 g of ethylene cucol monoethyl ether. Do the same and get 100,000 good prints. Seven tons! It was.

13th Patent Applicant: Ricoh Co., Ltd.

Claims (1)

[Scope of Claims] According to 1) 2 (electrophotographic plate having a layer containing a photoconductive compound and an alkali-soluble resin) 1) 2, As an f1 photoconductive compound. A printing plate for electrophotography, characterized in that it uses a compound expressed by the general formula. 1 In the formula 1, 1<1 is a methyl group, an ethyl group, or a 2-[!
ruethyl jiu rr, R represents a methyl group, ethyl IA, Hensyl 4k or phenyl group, R3
is hydrogen, chlorine, tow rope, alkyl having 1 to 4 carbon atoms,
Alkoxy group having 1 to 4 carbon atoms, dialkylamino 1,1
．． , or represents a 21 to 2 group. ]