DE2107901A1 - printing plate - Google Patents

Description

Description of the company's patent application

HTDRON CHEMICAL CO., LTD. 1, 3-chome, Nihonbashi-Tori, Chuo-ku, Tokyo, Japan

KANSAI PAINT CO., LTD. 27, 5-chome, fushimi-cho, Higashi-ku, Osaka, Japan

concerning . ^

printing plate
Priority; February 19, 1970, Japan, No. 13759/1970. /

The present invention relates to a printing plate; in particular, it relates to a printing plate having a photosensitive layer that is on the surface of a water-insoluble hydrophilic acrylic resin layer is applied. Most common pressure plates are made of aluminum mechanically roughened or chemically treated surface, ^ for example gelatine, polyvinyl alcohol or albumins together with a light-sensitive material such as chromates and diazo compounds are applied. The plates are finally dried, one applied to the plate exposed to negative photo film, developed and treated again. The photosensitive hardened parts of the lines and images absorb well due to the lipophilic properties Ink. On the other hand, the exposed surface of the aluminum plate absorbs water and repels ink upon development. When using such plates in the offset process, the

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exposed surface of the aluminum plate by the permanent Friction with the hardened parts and lines gradually thin. In some cases, the lines and images will wear off bound and reinforced by lacquer-like materials. The surface of the aluminum plate, especially its mechanically roughened one Surface tends to wear away sometimes more easily than the photosensitive hardened layer. When the surface wears out, the damaged plate does not close

~ distinctive images with little hydrophilic function and you can finally no longer print. Furthermore, the water requirement of the mechanically roughened aluminum surface must be suitable in order to obtain clear images and professional work is necessary for the adjustment of the water requirement. The subject of the present invention is the production of a new printing plate.
Another object of the present invention is to

- ^ a printing plate with an exceptionally long printing time to manufacture.

Another object of the present invention is to provide an improved output printing plate which a simplification of the layering process rcit brings.

Still other objects and the overall scope of applicability of the present invention will become apparent from the following detailed description clear. It should be noted, however, that the detailed description and the specific examples are only

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Preferred embodiments of the invention are for illustration only to serve. Various changes and modifications within the spirit and scope of the invention are intended for the A person skilled in the art is readily possible on the basis of the detailed description.

The printing plate according to the present invention is composed of a base plate, a layer of a water-insoluble hydrophilic acrylate or methacrylate polymer applied to the plate (hydrophilic acrylic resins) and a photosensitive layer coated on this layer.

Base plates used as the output pressure plate in the present invention are metal plates such as steel, Tin or zinc plate, stainless steel plate, etc., plastic plates such as polyethylene terephthalate plate, polystyrene plate, Acetyl cellulose sheet, hydrophilic acrylic resin sheet, etc. "and paper.

It is necessary that the hydrophilic acrylic resins that are the hydrophilic Form a layer, are insoluble in water.

The hydrophilic acrylic resins should be at least 20% by weight Absorb water, but preferably not more than about 120% of their weight water.

The hydrophilic one preferably used in the hydrophilic acrylic resins Monomer is preferably a hydroxy-lower alkyl acrylate or hydroxy-lower alkyl methacrylate, e.g. 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, diethylene glycol monoacrylate, diethylene glycol monomethacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl

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-A-

methacrylate, 3-hydroxypropyl acrylate, 3-hydroxypropyl methacrylate, Dipropylene glycol monomethacrylate and dipropylene glycol monoacrylate,

The most preferred monomers are hydroxyalkyl acrylates and hydroxyalkyl methacrylates, especially 2-hydroxyethyl methacrylate.

It can also use the polymers of acrylamide, methacrylamide, N-alkyl-substituted Acrylamide and methacrylamide, N-propyl acrylamide, N-isopropyl acrylamide, N-isopropyl methacrylamide, N-propyl methacrylamide, N-butyl acrylamide, N-methyl acrylamide and N-methyl methacrylamide, Diacetone acrylamide, N- (2-hydroxyethyl) acrylamide and N- (2-hydroxyethyl) methacrylamide are used. Copolymers of these monomers with one another or with other copolymerizable monomers can also be used will.

If the hydrophilic monomer gives a product that is water soluble is, for example polyacrylamide, it is necessary to use a copolymerizable monomer to convert it into To make Kasser only swellable and not water-soluble. The copolymerizable monomer can be used in an amount from 0.05 to 50% will be used / ended.

Preferred comonomers are methyl acrylate, ethyl acrylate, isopropyl acrylate, Propyl acrylate, butyl acrylate, sec-butyl acrylate, Pentyl acrylate, 2-'JhLonylhexylacrylat, methyl methacrylate, ethyl methacrylate, Propyl methacrylate, isopropyl methacrylate, butyl methacrylate, sec-butyl methacrylate, pentyl methacrylate, lower alkoxy

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ethyl acrylate and lower alkoxyethyl methacrylate, for example methoxyethyl acrylate, methoxyethyl methacrylate, sthoxyethyl acrylate and ethoxyethyl methacrylate, triethylene glycol acrylate, triethylene glycol methacrylate, Glycerol monoacrylate and glycerol monomethacrylate.

Unsaturated amines, p-amino-styrene, o-aminostyrene, 2-amino-4-vinyltoluene, alkylaminoalkylacrylate and methacrylate, for example diethylaminoethyl acrylate, diethylaminoethyl methacrylate, dimethylaminoethyl acrylate, dimethylaminoethyl acrylate, dimethylaminoethyl acrylate, dimethylaminoethyl acrylate, dimethylaminoethyl acrylate, polyaminoethyl acrylate , Morpholinoethyl acrylate, morpholinoethyl methacrylate, 2-vinylpyridine, 3-vinylpyridine, 4-vinylpyridine, 2-ethyl-5-vinylpyridine, dimethylaminopropyl acrylate, dimethylaminopropyl methacrylate, dipropylaminoethyl acrylate, di-propylaminoethyl acrylate, di-propylaminoethyl acrylate, di-propylaminoethyl-butyl-methacrylate, di-propylaminoethyl-butyl-methacrylate, di-acrylaminoethyl-butyl-methacrylamino-butylamino-butyl-methacrylate, di-acrylaminoethyl-butyl-butylaminoethyl-butyl-methacrylaminoethyl-but-butyl-methacrylate-n-butylaminoethyl-but-butyl-methacrylate 4-vinylpyridine, 4-vinylpyridine, 3-vinylpyridine, 4-vinylpyridine .-Butylaminoethyl acrylate, di-sec-butylaminoethyl methacrylate. Dimethylaminoethyl vinyl ether, diethylaminoethyl vinyl sulfide, diethylaminoethyl vinyl ether, aminoethyl vinyl ether, aminoethyl vinyl sulfide, monomethylaminoethyl vinyl sulfide, monomethylaminoethyl vinyl ether, N- (gamma-monomethylamino) -propyl-acrylamide, N- (gamma-monomethylamino) -propyl-acrylamide, N- (gamma-monomethylamino) -propyl-acrylamide, -amino-ethyl-amino-acrylamide, -amino-acrylamide, -am-methylamino ) -amino-acrylamide, -amino-methylamino) -propyl-acrylamide, -methyl-amino-acryl-amide, -amino-acryl-amide (-amino) -amino-acrylamide, -amino-acrylamido (amino) , 8-Amino octyl vinyl ether, 5-aminopentyl vinyl ether, 3-aminopropyl vinyl ether, 4-aminobutyl vinyl ether _# 2-aminobutyl vinyl ether, mono äthylaminoäthylraethacrylat, N- (3,5,5-trimethylhexyl) -aminoethyl-

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vinyl ether, N-cyclohexylaminoethyl vinyl ether, 2- (1,1,3, 3-Tetramethylbutylami.no) ethyl methacrylate, N-tert. -Butylaminoethyl vinyl ether, N-methylamino-ethyl vinyl ether, N-2-ethylhexylamino-ethyl vinyl ether, N-tert-butylaminoethyl vinyl ether, N-tert-octyl-aminoethyl vinyl ether, 2-pyrrolidinoethyl acrylate, 2-pyrrolidino-ethyl methacrylate, 3- (Dimethylaminoäthy1) -2-hydroxypropyl acrylate, 3- (dimethylaminoethyl) -2-hydroxypropyl methacrylate, 2-aminoethyl acrylate, 2-Aminoethyl methacrylate used v; earth. The present Preferred amino compounds are alkylaminoethyl acrylates and alkylaminoethyl methacrylates, and tert-butylaminoethyl is most preferred methacrylate.

The crosslinking agent is preferably present in amounts of 0.1-2.5%, more preferably in amounts of no more than 2.0%, though 0.05-15% or even 20% crosslinking agent can be used. Of course, care should be taken to ensure that the Crosslinking agents are not used in an amount that does not allow the product to absorb at least 20% water.

Typical examples of crosslinking agents are ethylene glycol diacrylate, Ethylene glycol dimethacrylate, 1,2-butylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, 1,4-butylene glycol dimethacrylate, Propylene glycol diacrylate, propylene glycol dimethacrylate, diethylene glycol dimethacrylate, dipropylene glycol dimethacrylate, Diethylene glycol diacrylate, dipropylene glycol diacrylate, divinylbenzene, divinyltoluene, diallyl tartrate, allyl pyruvate, Allyl maleate, divinyl tartrate, triallyl malamine, Ν, Ν'-methylene-bis-

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acrylamide, glycerine trimethacrylate, diallyl maleate, divinyl ether, Diallylmonoäthylenqiykolcitrat, Kthylenenglykolvinylallylcitrat, Allyl vinyl maleate, diallyl itaconate, ethylene glycol diester Itaconic acid, divinyl sulfone, hexahydro-1,3,5-triacryltriazine, Triallyl phosphite, diallyl ester of benzenephosphorous acid, polyester from maleic anhydride and triethylene glycol, polyallyglucose, for example triallyl glucose, polyallyl sucrose, for example pentallyl sucrose, sucrose diacrylate, glucose dimethacrylate, Pentaerythritol tetraacrylate, sorbitol diraethacrylate, Diallylaconitate, divinyl citraconate, diallyl fumarate. Ethylenically unsaturated acids or their salts can also be used can be used, such as acrylic acid, cinnamic acid, carotonic acid, methacrylic acid, itaconic acid, aconitic acid, maleic acid, fumaric acid, Mesaconic acid and citraconic acid. As previously shown, partial esters such as mono-2-hydroxypropyl itaconate, mono-2-hydroxyethyl itaconate, Mono-2-hydroxyethyl citraconate, mono-2-hydroxypropylaconitate, Mono-2-hydroxyethyl maleate, mono-2-hydroxypropyl fumarate, Mono-methyl itaconate, mono-ethyl itaconate, mono-methyl cellosolve ester of itaconic acid (methyl cellosolve is .. the monomethyl ether of diethylene glycol, mono-methyl cellosolve ester of maleic acid. can be used.

The polymers can be used as casting syrups, as aqueous dispersions, by aqueous suspension polymerization or as solutions in organic solvents such as ethyl alcohol, methyl alcohol, propyl alcohol, isopropyl alcohol, formamide, dimethyl sulfoxide or other suitable solvents.

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The polymerization can take place at 20 - 150 ° C, often at 35 - 90 ° C, and can be completed after use as a ship coating. The polymerization can take place Use of a free radical catalyst in an amount of 0/05 - 1%, based on the polymerizable monomer, carried out will. Typical catalysts are tert-butyl peroctoate, benzoyl peroxide, isopropyl percarbonate, 2,4-dichlorobenzoyl peroxide, Methyl ethyl ketone peroxide, cumene hydroperoxide and dicumyl peroxide. Irradiation, for example by ultraviolet light or

ö rays can also catalyze the polymerization be used.

The hydrophilic polymers are used as a solution, as a pouring syrup or as a film, which is applied to the surface of the base plate with the help of Painting, pouring, gluing and the like. With and without the use of adhesives are applied, used and form a water-insoluble hydrophilic resin layer. The strength of the hydrophilic Resin layer is generally 5-300 microns, preferably 10-50 microns. By applying a water-insoluble hydrophilic resin layer on the surface of the base plate can give good results in terms of dimensional stability the hydrophilic layer or printing plate, in view of its application on the printing machine and the like. Since the hydrophilic resin is transparent, the printing plate becomes completely transparent when a transparent plastic plate is used as Base plate is used. This has an advantage in that recording is easier in multi-color printing.

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Further, oxidizing hardeners such as sodium, potassium or ammonium chromate or dichromate, aminoplast resins such as melamine resin, benzoguanamine resin or acetoguanamine resin, acid anhydrides can be incorporated with the hydrophilic resins in order to produce a layer with increased mechanical strength and adhesion to the base plate such as maleic anhydride, citraconic anhydride, succinic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride and the like, polyamines, such as ethylenediamine, propylenediamine, diethylenetriamine, tetraethylenepentamine, piperazine, pyrazine, p-benzene-phenylenediamine, piperazine, pyrazine, m-xylenediamine, p-benzene-phenylenediamine, p-benzene-phenylenediamine, p-benzene-phenylenediamine, trimellitic anhydride, Diaminodiphenylmethane, Diaminodiphenylsulfon, 3,3'-dichloro-4,4 ^l -diphenylmethanediamine, Naphthalenediamine and the like.

The amount of curing agents added to the hydrophilic resin is generally less than 2% by weight, preferably 0.1 to 0.5% by weight.

However, the mechanical strength of the hydrophilic resin layer increases by adding the hardening agent, while the hydrophilic resin layer increases Properties sometimes decrease. In such a case, it is preferred to use finely divided powdered materials over hydrophilic ones Add resin. Such an addition achieves sufficient hydrophilic properties for the printing plate. Such powdered materials are finely divided powdered inorganic materials, for example silicon dioxide, aluminum dioxide, Magnesium oxide, zirconium oxide, barium sulfate, acidic clay,

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active clay, talc and diatomaceous earth. Preferred materials are silicon dioxide and aluminum oxide. The amount of the powdered materials to the hydrophilic resin is less than 5% by weight, preferably 0.5-2 % by weight . As the compounds forming a photosensitive layer of the present invention, photosensitive mixtures composed of vinyl monomers, photosensitizers and resins such as unsaturated polyester resin, alkyd resin, acrylic urethane resin, silicone-modified acrylic resin, polybutadiene and cellulose, photosensitive polymers, are used by compounds such as diazo compounds, azide compounds, organosulfur compounds and cinnamic acid compounds, and mixtures composed of dichromates and gelatin, polyvinyl alcohol and albumin. Acrylic urethane resins are particularly superior to others in terms of printing capacity and staying power.

The above-mentioned polymeric materials are dissolved in organic solvents which have the property of being hydrophilic Layer to swell or partially dissolve, for example alcohols, ketones and esters, and on the surface of the hydrophilic Resin layer applied by coating and drying. In such a case, the surface of the hydrophilic resin layer swells on or partially dissolves and mixes with photosensitive compounds and both layers become one another glued. The printing plate thus obtained is exposed to a negative film, developed, washed with water and dried

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and, if necessary, absorbs water. Then she will be on the Offset printing machine attached and used for offset printing. It gives excellent results. When the hydrophilic layer is relatively thick, the water requirement can be kept extremely small by a spray roller. In the present invention, a rrit becomes a water-insoluble one hydrophilic resin coated metal plate, plastic plate, paper and the like instead of the usual aluminum plate used. Therefore, when the hydrophilic resin layer is worn away, the lithographic printability does not become perfect made impossible as long as the hydrophilic layer exists. The printing capacity and the printing durability decrease very much to. Because even though only less than 20,000 sheets of paper were made using the conventional aluminum plate (with albumin and mechanically roughened) can be produced, it is surprising that more than 100,000 sheets of paper can be printed using the printing plate of the present invention can.

Another effect of the present invention is that only a small amount of water is required for lithographic printing necessary is. The hydrophilic resin layer releases the absorbed water slowly and constantly and it is possible, just with get by with a low water requirement. Thus, an excessive amount of water will not be transferred to the printing paper and the printing accuracy increases considerably without stretching the size of the paper.

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These properties also help make the printing process easier without the need for water to be checked by a specialist.

As mentioned above, the printing plate features a photosensitive Layer on the hydrophilic resin layer has very great advantages compared to the conventional printing plate with a photosensitive layer directly on the aluminum plate and is very favorable because of the increased durability and printing Printing accuracy and because of the simple printing process. The invention can be better understood in connection with the drawing v / earth.

Fig. 1 shows a partial cross section of the printing plate according to the invention and

Fig. 2 shows a partial cross-section of the printing plate after exposure and develop.

With regard to the details of the drawing it should be noted that the output pressure plate consists of a base plate 1, a Layer 2 of water-insoluble hydrophilic acrylic resins applied to plate 1 and a photosensitive one on which Layer 2 applied layer 3 consists. The thickness of layers 2 and 3 are very exaggerated Signed for the sake of explanation.

Unless otherwise indicated in the description and in the claims, all parts and percentages are parts by weight and Percent by weight.

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example 1

400 parts of polyethylene glycol-400 become 360 parts of tolylene diisocyanates given and reacted with heating at 140 C for 30 minutes and cooled; then 260 parts of 2-hydroxyethyl methacrylate are grounded and 0.21 part of p-benzoquinone added to the reactant and reacted at a temperature of 40 ° C for 24 hours, to obtain unsaturated acrylic urethane resin (I). The resin (I) was a very viscous liquid at room temperature. That Photosensitive resin mixture was obtained by adding 50 parts of the resin (I) with 50 parts of commercially available cellulose phthalate, 1 part Benzoin ethyl ether and 100 parts of acetone were mixed.

Example 2

The solution consisting of 79.6% 2-hydroxyethyl methacrylate, 0.3% ethylene glycol dimethacrylate, 20% glycerol and 0.1% diethyl percarbonate was poured into the space between two glass plates, set by a spacer to carefully maintain a 0.15 mm gap and so as not to form bubbles. The mixture was polymerized by maintaining a temperature of 65 ° C. for 20 minutes, then a transparent plate was obtained by removing the plates. Then, it was washed with distilled water, and the glycerol was extracted and further dried at room temperature at a relative humidity of 40% and a temperature of 25 ° C. for 24 hours to obtain a hydrophilic resin plate. The plate was glued to a 0.15 mm thick aluminum plate

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using an adhesive mixture of an epoxy and Polyamide resin. The other side of the resin plate was evenly coated with a photosensitive resin mixture contained in Example 1 was obtained so that the dry film thickness is about 2 microns. It was then dried around the To obtain printing plate.

After the negative film was placed on the printing plate, the plate was placed in the vacuum pressure chamber and a high pressure mercury lamp exposed at a distance of 35 cm for 1 minute; then was with a 1% aqueous ethanolamine solution developed, washed with water and dried to obtain the printing lithograph. The offset printing was carried out using lithography. There were very good printing effects with good discrimination and good dimensional accuracy obtained. It is also possible to print and control more than frSngCTU * sheets of paper per plate the water requirement is lighter than with the conventional method.

Example 3

The hydrophilic Monorrerlösung of Example 2 was applied to the 0.15 mm thick aluminum plate, previously with a 10 micron thick primer mix made of an epoxy-polyamide resin had been coated. The thickness of the hydrophilic resin is about 0.2 mm. It was taking under a nitrogen atmosphere polymerized under the same conditions as in Example 2. then

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the lithography was prepared for printing and the offset printing executed. The same good results as in Example 2 were obtained.

Example 4

A hydrophilic resin plate obtained in Example 2 was adhered to the surface of a 0.2 mm polyethylene terephthalate plate with the aid of an epoxy adhesive and the other Surface of the resin plate with a diazo compound "Fuji Super-Resist", a commercial product of Fuji Chemicals Co., Ltd., in coated to a thickness of 3 microns, exposed to the negative film and treated as previously described to form a printing plate to obtain. Four color offset printing was used the printing plate carried out and the good results obtained as in Example 2. Also every record was recorded easily and quickly executed because of its permeability.

Example 5

1.0 g of xylene, 100 g of 2-hydroxyethyl methacrylate and 0.33 g of isopropyl percarbonate were placed in a flask fitted with a stirrer and heating mantle. The flask was at 100 ° C stirred rapidly under a nitrogen atmosphere. After 15 minutes the slurry was filtered off hot and the polymer isolated. The polyv More powder was slurried again in 300 ml of xylene, filtered and dried. A 98% yield of an alcohol soluble powder (particle size 2-5 microns) was obtained. 100 g des

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polymeric powder was dissolved in 200 ml of methanol, followed by 0.2 g of epoxy resin and 1.5 g of finely divided silica powder added and dispersed homogeneously. The solution thus obtained was applied to a primer mixture of epoxy-polyamide resin, which had previously been applied to a 0.15 mm thick steel plate to become 10 microns thick, so that the dried layer 20 microns thick and dried. The lithography was then prepared for printing and the offset printing executed. The same good results as in Example 2 were obtained. The mechanical strength of the hydrophilic Resin layer was good.

Ex iel 6

A pouring syrup was made from 100 g of 2-hydroxyethyl acrylate and 0.2 g of ethylene glycol diacrylate produced and 0.4 g of tert-butyl peroctoate, 1 g of ethylenediamine and 1 g of finely divided aluminum oxide powder added to the syrup and dispersed homogeneously. The syrup was placed on a thin plate so that the dried starch Was 30 microns. Then, the lithography for printing was made and the offset printing was carried out. It became the the same good results as in Example 2 were obtained. The mechanical The strength of the hydrophilic resin layer was very good.

Example 7

A pouring syrup was made from 100 g of 2-hydroxyethyl methacrylate, 0.2 g Kthylenglykoldiinethacrylat produced and 0.4 g tert.-Putylper-

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octoate, 0.2 g potassium dichromate and 2 g finely divided silicon dioxide powder added to the syrup and dispersed homogeneously. The syrup was applied to an aluminum plate so that the dried thickness was 25 microns. Then the lithography was prepared for printing and offset printing was carried out. It the same good results as in Example 2 were obtained. The mechanical strength of the hydrophilic resin layer was very good.

Example 8

7.5 liters of ethanol, 100 g of tert-butylaminoethyl methacrylate, 150 g n-isopropyl acrylamide and 2.55 kg of 2-hydroxyethyl methacrylate (the 0.3% ethylene glycol dimethacrylate) were used together with 10 g of tert-butyl peroctoate are placed in a kettle and the solution is heated to 85 ° C. for 7 hours to prevent the polymerization to carry out a 90% rate of use. 0.25 g maleic anhydride and 1 g finely divided silicon dioxide powder were the so added polymers obtained and dispersed homogeneously. The solution was applied to an aluminum plate so that the dried thickness was 35 microns ". Then the lithography was prepared for printing and the offset printing was carried out. It the same good results as in Example 2 were obtained. The mechanical strength of the hydrophilic resin layer was great Well.

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Claims (20)

Claims Printing plate, consisting of a base plate, a layer of a water-insoluble hydrophilic material applied to this plate Acrylate or methacrylate polymers and one on top of these Layer applied photosensitive layer. 2. Printing plate according to claim 1, characterized in that the water-insoluble polymer consists of a polymer of hydrophilic Hydroxy-lower alkyl acrylate and / or hydroxy-lower alkyl methacrylate and / or hydroxy-lower alkoxy-lower alkyl acrylate and / or hydroxy-lower alkoxy-lower alkyl methacrylate and / or Acrylamide and / or methacrylamide and / or alkyl acrylamide and / or Alky! Methacrylamide and / or diacetone acrylamide. 3. Printing plate according to claim 2, characterized in that the water-insoluble polymer consists of a polymer of hydroxyethyl acrylate and / or hydroxyethyl methacrylate and / or hydroxypropyl acrylate and / or hydroxypropyl methacrylate. 4. Printing plate according to claim 3, characterized in that the polymer is a straight chain polymer. 5. Printing plate according to claim 5, characterized in that the polymer is a homopolymer. 109836/099 8 6. Printing plate according to claim 3, characterized in that the polymer is a mixed polymer of acrylate or methacrylate with a minor amount up to 15% of an extender. 1. Printing plate according to claim 1, characterized in that the water-insoluble hydrophilic polymer layer contains hardeners, namely oxidizing hardeners and / or aminoplast resins and / or epoxy resins and / or acid anhydrides and / or polyamines. 8. Printing plate according to claim 7, characterized in that the water-insoluble hydrophilic polymer layer contains finely divided powdered inorganic materials. 9. Printing plate according to claim 8, characterized in that the water-insoluble polymer consists of a hydrophilic hydroxy-lower alkyl acrylate and / or hydroxy-lower alkyl methacrylate
and / or hydroxy-lower alkoxy-lower alkyl acrylate and / or
Kydroxy-lower alkoxy-lower alkyl methacrylate and / or acrylamide and / or methacrylamide and / or alkyl acrylamide and / or alkyl methacrylamide and / or diacetone acrylamide. 10. Printing plate according to claim 9, characterized in that the water-insoluble polymer consists of a hydroxyethyl acrylate
and / or hydroxyethyl methacrylate and / or hydroxypropyl acrylate 109836/0996 - 20 and / or hydroxypropyl methacrylate. 11. Printing plate according to claim 10, characterized in that the polymer is a straight-chain polymer. .12. Printing plate according to claim 10, characterized in that the polymer is a mixed polymer of acrylate or methacrylate with a minor amount up to 15% of a crosslinking agent. 13. Printing plate according to claim 9, characterized in that the hardeners are oxidizing hardeners. 14. Printing plate according to claim 13, characterized in that the oxidizing hardener is dichromate. 15. Printing plate according to claim 9, characterized in that the hardening agents are amino resins. 16. Printing plate according to claim 9, characterized in that the curing agents are epoxy resins. 17. Printing plate according to claim 9, characterized in that the hardening agents are acid anhydrides. 18. Printing plate according to claim 9, characterized in that 103836/0996 - 21 the curing agents are polyamines. 19. Printing plate according to claim 10, characterized in that the finely divided powdered inorganic material is powdered Is silica. 20. Printing plate according to claim 10, characterized in that the finely divided powdered inorganic material is powdered Aluminum oxide is. ■; 11 '; ■; ■■ * / ϋ 9 9 6 Blank page