EP1025990B1 - Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden - Google Patents

Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden Download PDF

Info

Publication number
EP1025990B1
EP1025990B1 EP19990200290 EP99200290A EP1025990B1 EP 1025990 B1 EP1025990 B1 EP 1025990B1 EP 19990200290 EP19990200290 EP 19990200290 EP 99200290 A EP99200290 A EP 99200290A EP 1025990 B1 EP1025990 B1 EP 1025990B1
Authority
EP
European Patent Office
Prior art keywords
imaging element
heat
image
element according
printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19990200290
Other languages
English (en)
French (fr)
Other versions
EP1025990A1 (de
Inventor
Marc C/O Agfa-Gevaert N.V. Van Damme
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
Agfa Gevaert AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert NV, Agfa Gevaert AG filed Critical Agfa Gevaert NV
Priority to DE69908543T priority Critical patent/DE69908543T2/de
Priority to EP19990200290 priority patent/EP1025990B1/de
Priority to JP2000014382A priority patent/JP2000218954A/ja
Priority to US09/495,324 priority patent/US6300032B1/en
Publication of EP1025990A1 publication Critical patent/EP1025990A1/de
Application granted granted Critical
Publication of EP1025990B1 publication Critical patent/EP1025990B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B41C1/1025—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials using materials comprising a polymeric matrix containing a polymeric particulate material, e.g. hydrophobic heat coalescing particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/04—Negative working, i.e. the non-exposed (non-imaged) areas are removed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/08—Developable by water or the fountain solution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/22—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by organic non-macromolecular additives, e.g. dyes, UV-absorbers, plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/24—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers

Definitions

  • the present invention relates to a heat-sensitive material for preparing lithographic printing plates.
  • the invention is related to a processless heat-sensitive material which yields lithographic printing plates with a high sensitivity.
  • Lithographic printing is the process of printing from specially prepared surfaces, some areas of which are capable of accepting ink, whereas other areas will not accept ink.
  • a photographic material is made imagewise receptive to oily or greasy ink in the photo-exposed (negative working) or in the non-exposed areas (positive working) on a ink-repelling background.
  • lithographic plates also called surface litho plates or planographic printing plates
  • a support that has affinity to water or obtains such affinity by chemical treatment is coated with a thin layer of a photosensitive composition.
  • Coatings for that purpose include light-sensitive polymer layers containing diazo compounds, dichromate-sensitized hydrophilic colloids and a large variety of synthetic photopolymers. Particularly diazo-sensitized systems are widely used.
  • the exposed image areas become insoluble and the unexposed areas remain soluble.
  • the plate is then developed with a suitable liquid to remove the diazonium salt or diazo resin in the unexposed areas.
  • thermoplastic polymer particles By image-wise exposure to an infrared laser, the thermoplastic polymer particles are image-wise coagulated thereby rendering the surface of the imaging element at these areas ink accepting without any further development.
  • a disadvantage of this method is that the printing plate obtained is easily damaged since the non-printing areas may become ink-accepting when some pressure is applied thereto. Moreover, under critical conditions, the lithographic performance of such a printing plate may be poor and accordingly such printing plate has little lithographic printing latitude.
  • EP-A- 770 494, 770 495, 770 496 and 770 497 disclose a method for making a lithographic printing plate comprising the steps of (1) image-wise exposing to light a heat-sensitive imaging element comprising (i) on a hydrophilic surface of a lithographic base an image-forming layer comprising hydrophobic thermoplastic polymer particles dispersed in a hydrophilic binder and (ii) a compound capable of converting light to heat, said compound being comprised in said image-forming layer or a layer adjacent thereto; (2) and developing a thus obtained image-wise exposed element by rinsing it with plain water.
  • EP-A- 771 645 discloses a method for making a lithographic printing plate comprising the steps of:
  • a heat-sensitive material for making lithographic printing plates comprising on a lithographic support a first image-forming layer comprising a hydrophilic binder, a cross-linking agent for said hydrophilic binder and dispersed hydrophobic thermoplastic polymer particles, and as top image-forming layer a heat switchable image forming layer comprising a heat switchable polymer wherein said top image-forming layer or a layer adjacent to said top image-forming layer comprises a compound capable of converting light into heat, characterized in that said heat switchable polymer is a polymer containing aryldiazosulphonate units.
  • a higher sensitivity of an imaging element can be used to an advantage in several ways.
  • the exposure time of the imaging may be shorter, increasing the output of the imaging apparatus.
  • the power of the exposing source may be lower, resulting in an increase of life-time of the exposing source.
  • a layer which becomes on the one hand more hydrophilic or soluble in water or on the other hand more oleophilic or less soluble in water under the influence of heat is called a heat switchable layer.
  • the compound which is responsible for said switching of polarity is called a heat switchable compound.
  • the top image-forming layer which becomes more oleophilic under the influence of heat comprises a polymer or copolymer which contains aryldiazosulphonate units.
  • a heat switchable polymer having aryldiazosulphonate units also called aryldiazosulphonate resin, preferably is a polymer having aryldiazosulphonate units corresponding to the following formula: wherein R 0,1,2 each independently represent hydrogen, an alkyl group, a nitrile or a halogen, e.g. Cl, L represents a divalent linking group, n represents 0 or 1, A represents an aryl group and M represents a cation.
  • L preferably represents divalent linking group selected from the group consisting of: (X) t -CONR 3 -, -(X) t -COO-, -X- and -(X) t -CO-, wherein t represents 0 or 1, R 3 represents hydrogen, an alkyl group or an aryl group, X represents an alkylene group, an arylene group, an alkylenoxy group, an arylenoxy group, an alkylenethio group, an arylenethio group, an alkylenamino group, an arylenamino group, oxygen,sulfur or an aminogroup.
  • A preferably represents an unsubstituted aryl group, e.g.
  • phenyl group or more preferably an aryl group, e.g. phenyl, substituted with one or more alkyl group, aryl group, alkoxy group, aryloxy group or amino group.
  • M preferably represents a cation such as NH4 + or a metal ion such as a cation of Al, Cu, Zn, an alkaline earth metal or alkali metal.
  • a polymer having aryldiazosulphonate units is preferably obtained by radical polymerisation of a corresponding monomer. Suitable monomers for use in accordance with the present invention are disclosed in EP-A- 339 393 and EP-A- 507 008 .
  • Aryldiazosulphonate monomers e.g. as disclosed above, can be homopolymerised or copolymerised with other aryldiazosulphonate monomers and/or with vinyl monomers such as (meth)acrylic acid or esters thereof, (meth)acrylamide, acrylonitrile, vinylacetate, vinylchloride, vinylidene chloride, styrene, alpha-methyl styrene etc.. In case of copolymers however, care should be taken not to impair the water solubility of the polymer.
  • the amount of aryldiazosulphonate comprising units in a copolymer in connection with this invention is between 10 mol % and 60 mol %.
  • an aryldiazosulphonate containing polymer may be prepared by reacting a polymer having e.g. acid groups or acid halide groups with an amino or hydroxy substituted aryldiazosulphonate. Further details on this procedure can be found in EP-A- 507 008 .
  • the top image-forming layer or a layer adjacent to said layer includes a compound capable of converting light into heat.
  • Suitable compounds capable of converting light into heat are preferably infrared absorbing components although the wavelength of absorption is not of particular importance as long as the absorption of the compound used is in the wavelength range of the light source used for image-wise exposure.
  • Particularly useful compounds are for example dyes and in particular infrared absorbing dyes and pigments and in particular infrared absorbing pigments. Examples of infrared absorbing dyes are disclosed in EP-A- 908307.
  • infrared absorbing pigments are carbon black, metal carbides, borides, nitrides, carbonitrides, bronze-structured oxides and oxides structurally related to the bronze family but lacking the A component e.g. WO 2.9 . It is also possible to use conductive polymer dispersion such as polypyrrole or polyaniline-based conductive polymer dispersions. Said compound capable of converting light into heat is preferably present in the top image-forming layer but can also be included in the adjacent layer.
  • Said compound capable of converting light into heat is present in the imaging element preferably in an amount between 1 and 40 % by weight of the total weight of the top image-forming layer, more preferably in an amount between 2 and 30 % by weight of the total weight of the top image-forming layer.
  • the compound capable of converting light into heat is most preferably present in the top image-forming layer in an amount to provide an optical density at a wavelength between 700 nm and 1500nm of at least 0.35.
  • the top image-forming layer is preferably applied in an amount between 0.1 and 5 g/m 2 , more preferably in an amount between 0.5 and 3 g/m 2 .
  • an imaging element comprising a first image forming layer comprising hydrophobic thermoplastic polymer particles with a preferred average particle size between 40nm and 150nm. More preferably the hydrophobic thermoplastic polymer particles are used with an average particle size of 40nm to 80nm. Furthermore the hydrophobic thermoplastic polymer particles used in connection with the present invention preferably have a coagulation temperature above 50°C and more preferably above 70°C. Coagulation may result from softening or melting of the thermoplastic polymer particles under the influence of heat. There is no specific upper limit to the coagulation temperature of the thermoplastic hydrophobic polymer particles, however the temperature should be sufficiently below the decomposition temperature of the polymer particles.
  • the coagulation temperature is at least 10°C below the temperature at which the decomposition of the polymer particles occurs.
  • said polymer particles are subjected to a temperature above the coagulation temperature they coagulate to form a hydrophobic agglomerate in the hydrophilic layer so that at these parts the hydrophilic layer becomes hydrophobic and oleophilic.
  • hydrophobic polymer particles for use in connection with the present invention have a Tg above 80°C.
  • the polymer particles are selected from the group consisting of polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, polyvinyl carbazole etc., copolymers or mixtures thereof. Most preferably used are polystyrene, polymethylmethacrylate or copolymers thereof.
  • the weight average molecular weight of the polymers may range from 5,000 to 5, 000, 000g/mol.
  • the polymer particles are present as a dispersion in the aqueous coating liquid of the image-forming layer and may be prepared by the methods disclosed in US-P- 3 476 937 .
  • Another method especially suitable for preparing an aqueous dispersion of the thermoplastic polymer particles comprises:
  • the amount of hydrophobic thermoplastic polymer particles contained in the image-forming layer is preferably at least 10% by weight and more preferably at least 15% by weight and most preferably at least 20% by weight of the total weight of said layer.
  • Suitable hydrophilic binders for use in a first image-forming layer in connection with this invention are water soluble (co)polymers for example synthetic homo- or copolymers such as polyvinylalcohol, a poly(meth)acrylic acid, a poly(meth)acrylamide, a polyhydroxyethyl(meth)acrylate, a polyvinylmethylether or natural binders such as gelatin, a polysaccharide such as e.g. dextran, pullulan, cellulose, arabic gum, alginic acid, inuline or chemically modified inuline.
  • water soluble (co)polymers for example synthetic homo- or copolymers such as polyvinylalcohol, a poly(meth)acrylic acid, a poly(meth)acrylamide, a polyhydroxyethyl(meth)acrylate, a polyvinylmethylether or natural binders such as gelatin, a polysaccharide such as e.g. dex
  • a cross-linked hydrophilic binder in the first heat-sensitive layer used in accordance with the present embodiment also contains substances that increase the mechanical strength and the porosity of the layer e.g. metal oxide particles having an average diameter of at least 100 nm which are particles of titanium dioxide or other metal oxides. Incorporation of these particles gives the surface of the cross-linked hydrophilic layer a uniform rough texture consisting of microscopic hills and valleys.
  • metal oxide particles having an average diameter of at least 100 nm which are particles of titanium dioxide or other metal oxides. Incorporation of these particles gives the surface of the cross-linked hydrophilic layer a uniform rough texture consisting of microscopic hills and valleys.
  • titanium dioxide used in 50 to 95 % by weight of the heat-sensitive layer, more preferably in 60 to 90% by weight of the heat-sensitive layer.
  • the first image-forming layer also comprises crosslinking agents, such as formaldehyde, glyoxal, polyisocyanate or a hydrolysed tetra-alkylorthosilicate.
  • crosslinking agents such as formaldehyde, glyoxal, polyisocyanate or a hydrolysed tetra-alkylorthosilicate. The latter is particularly preferred.
  • the first imaging layer preferably contains surfactants which can be anionic, cationic, non-ionic or amphoteric.
  • Perfluoro surfactants are preferred. Particularly preferred are non-ionic perfluoro surfactants. Said surfactants can be used alone or preferably in combination.
  • the weight of the first imaging layer ranges preferably from 1 to 12 g/m 2 , more preferably from 3 to 9 g/m 2 .
  • the lithographic base according to the present invention can be aluminum e.g. electrochemically and/or mechanically grained and anodised aluminum.
  • the lithographic base can be a flexible support.
  • flexible support in connection with the present embodiment it is particularly preferred to use a plastic film e.g. substrated polyethylene terephthalate film, polyethylene naphthalate film, cellulose acetate film, polystyrene film, polycarbonate film, polyethylene film, polypropylene film, polyvinyl chloride film, polyether sulphone film.
  • the plastic film support may be opaque or transparent.
  • paper or glass of a thickness of not more than 1.2 mm can also be used.
  • the imaging element is image-wise exposed. During said exposure, the exposed areas are converted to hydrophobic and oleophilic areas while the unexposed areas remain hydrophilic.
  • Imaging in connection with the present invention is preferably done with an image-wise scanning exposure, involving the use of a laser, more preferably of a laser that operates in the infrared or near-infrared, i.e. wavelength range of 700-1500 nm. Most preferred are laser diodes emitting in the near-infrared. Exposure of the imaging element can be performed with lasers with a short as well as with lasers with a long pixel dwell time. Preferred are lasers with a pixel dwell time between 0.005 ⁇ s and 20 ⁇ s.
  • the exposure of the imaging element can be carried out with the imaging element already on the press.
  • a computer or other information source supplies graphics and textual information to the laser via a lead.
  • the printing plate of the present invention can also be used in the printing process as a seamless sleeve printing plate.
  • This cylindrical printing plate has such a diameter that it can be slided on the print cylinder. More details on sleeves are given in "Grafisch Nieuws" ed. Keesing, 15, 1995, page 4 to 6.
  • the image-wise exposed imaging element can be developed by washing preferably with plain water.
  • the plate is then ready for printing and can be mounted on the press.
  • the imaging element can be subjected to an overall post-exposure to UV-radiation to harden the image in order to increase the run lenght of the printing plate.
  • the image-wise exposed imaging element after optional wiping is mounted on a print cylinder of a printing press with the backside of the imaging element (side of the support opposite to the side having the photosensitive layer).
  • the printing press is then started and while the print cylinder with the imaging element mounted thereon rotates, the dampener rollers that supply dampening liquid are dropped on the imaging element and subsequent thereto the ink rollers are dropped.
  • the dampener rollers may be dropped simultaneously.
  • the photosensitive layer of an image-wise exposed imaging element in accordance with the present invention is wiped with e.g. a cotton pad or sponge soaked with water before mounting the imaging element on the press or at least before the printing press starts running.
  • a cotton pad or sponge soaked with water This will remove some unexposed aryldiazosulphonate resin but will not actually develop the imaging element.
  • it has the advantage that possible substantial contamination of the dampening system of the press and ink used is avoided.
  • An exposed imaging element in accordance with the present invention is preferably mounted on a printing press and used to print shortly after the exposure. It is however possible to store an exposed imaging element for some time in the dark before using it on a printing press to print copies.
  • Suitable dampening liquids that can be used in connection with the present invention are aqueous liquids generally having an acidic pH and comprising an alcohol such as isopropanol and silica.
  • dampening liquids useful in the present invention there is no particular limitation and commercially available dampening liquids, also known as fountain solutions, can be used.
  • dampening liquids also known as fountain solutions.
  • the invention will now be illustrated by the following examples without however the intention to limit the invention thereto. All parts are by weight unless stated otherwise.
  • the first image-forming layer is coated from water onto a subbed polyester substrate resulting in a thermosensitive crosslinked hydrophilic layer with the following composition: 3.94 g/m 2 TiO 2 (average particle size 0.3 to 0.5 ⁇ m), 0.44 g/m 2 polyvinylalcohol, 2.00 g/m 2 hydrolyzed tetramethylorthosilicate and 1.49 g/m 2 of a polystyrene latex. After coating the layer was hardened for 7days at 57°C and 34%R.H.
  • the azosulphonate layer was coated from methanol on top of the crosslinked first layer resulting in an IR-sensitive layer with the following composition: 0.072 g/m 2 of IR-dye 1 and 0.720 g/m 2 of a copolymer P20 containing 20 mole % of the azosulphonate M1 and 80 mole % of methyl methacrylate.
  • the azogroups containing substances have to be protected from light e.g. by darkening the room or wrapping the flasks with aluminum foil.
  • the reagents were obtained from Fluka and Aldrich, solvents were distilled before use.
  • Solution 3 is added dropwise to solution 2 while cooling (below 5°C), then it is stirred for 10 minutes. After filtration the solution is poured quickly into solution 1 under intensive stirring. Then the solution is stirred for 30 minutes. The solution may be red at the beginning but the colour turns to yellow after some minutes. The solid product is filtered off from the solution and used without further purification.
  • the product is dissolved in 150 ml water, 8 g NaOH are added, then the solution is heated to 50°C for one hour and afterwards cooled down to 0°C. While still cooling, 19,66 ml concentrated HCl (32%) are added to the solution. Then 100 ml 1% picrinic acid and a solution of 33,6 sodium carbonate in about 350 ml water are poured into the mixture. Before adding the methacrylic acid chloride the temperature of the solution has to be below 5°C. From a dropping funnel 15 ml of methacrylic acid chloride is very slowly dropped to the solution (heavy foaming). The mixture needs to be stirred for 1 hour at 0-5°C and after that for another hour at room temperature.
  • the resulting heat-sensitive material was imaged on a Creo 3244 Trendsetter TM at 2400 dpi, operating at drum speeds of 40, 62, 80 and 112 rpm, and a laser output of 11 Watt.
  • the plate was mounted on an AB DickTM press using K+E 800TM as ink and water with 2% Tame TM as fountain. Subsequently the press was started by allowing the print cylinder with the heat-sensitive material mounted thereon to rotate. The dampener rollers of the press were then dropped on the imaging element so as to supply dampening liquid to the heat-sensitive material and after 10 revolutions of the print cylinder, the ink rollers were dropped to supply ink. After 25 further revolutions clear prints were obtained with no ink-uptake in the non-image parts. An acceptable ink-uptake in the IR-imaged areas was observed at 80 rpm i.e. 242 mJ/cm 2 .
  • This comparative example describes the results of a heat-sensitive material corresponding to example 1 but without the presence of the azosulphonate in the top layer.
  • the first layer was coated in an identical manner as in example 1.
  • the top layer was coated from methanol on top of the crosslinked first layer with the following composition: 0.072 g/m 2 of IR-dye 1.
  • the resulting heat-sensitive material was imaged and printed as in example 1.
  • An acceptable ink-uptake in the IR-imaged areas was observed at 40 rpm i.e. 485 mJ/m 2 .
  • This comparative example describes the results of a heat-sensitive material corresponding to example 1 but without the presence of a first layer i.e. no layer comprising hydrophobic thermoplastic polymer particles in a crosslinked hydrophilic binder.
  • the first image-forming layer is coated from water onto a subbed polyester substrate resulting in a crosslinked hydrophilic layer with the following composition: 3.94 g/m 2 TiO 2 (average particle size 0.3 to 0.5 ⁇ m), 0.44 g/m 2 polyvinylalcohol, 2.00 g/m 2 hydrolyzed tetramethylorthosilicate. After coating the layer was hardened for 7days at 57°C and 34%R.H.
  • the azosulphonate layer was coated from methanol on top of the crosslinked first layer resulting in an IR-sensitive layer with the following composition: 0.072 g/m 2 of IR-dye 1 and 0.720 g/m 2 of a copolymer P20 containing 20%wt of the azosulphonate 1 and 80%wt of methyl methacrylate.
  • the resulting heat-sensitive material was imaged and printed as in example 1.
  • An acceptable ink-uptake in the IR-imaged areas was observed at 60 rpm i.e.313 mJ/cm 2 .

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Materials For Photolithography (AREA)

Claims (10)

  1. Ein wärmeempfindliches Material zur Herstellung von lithografischen Druckplatten, wobei das Material auf einem lithografischen Träger eine erste bilderzeugende Schicht, die ein hydrophiles Bindemittel, ein Vernetzungsmittel für das hydrophile Bindemittel und dispergierte hydrophobe thermoplastische polymere Teilchen enthält, und als obere bilderzeugende Schicht eine thermisch schaltbare, ein thermisch schaltbares Polymer enthaltende bilderzeugende Schicht enthält, wobei die obere bilderzeugende Schicht oder eine an die obere bilderzeugende Schicht grenzende Schicht eine Verbindung enthält, die Licht in Wärme umzuwandeln vermag, dadurch gekennzeichnet, daß das thermisch schaltbare Polymer ein Aryldiazosulfonateinheiten enthaltendes Polymer ist.
  2. Ein wärmeempfindliches Bilderzeugungselement nach Anspruch 1, dadurch gekennzeichnet, daß die Menge Aryldiazosulfonateinheiten im Polymer zwischen 10 mol-% und 60 mol-% liegt.
  3. Ein wärmeempfindliches Bilderzeugungselement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Aryldiazosulfonateinheiten enthaltende Polymer ein Copolymer mit einem Monomer aus der Gruppe bestehend aus (Meth)acrylsäure oder deren daraus gebildeten Estern, (Meth)acrylamid, Acrylnitril, Vinylacetat, Vinylchlorid, Vinylidenchlorid, Styrol und α-Methylstyrol ist.
  4. Ein wärmeempfindliches Bilderzeugungselement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Aryldiazosulfonateinheiten substituierte Aryldiazosulfonateinheiten sind.
  5. Ein wärmeempfindliches Bilderzeugungselement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Verbindung, die Licht in Wärme umzuwandeln vermag, eine infrarotabsorbierende Komponente ist.
  6. Ein wärmeempfindliches Bilderzeugungselement nach Anspruch 5, dadurch gekennzeichnet, daß die infrarotabsorbierende Komponente ein infrarotabsorbierender Farbstoff ist.
  7. Ein wärmeempfindliches Bilderzeugungselement nach Anspruch 5, dadurch gekennzeichnet, daß die infrarotabsorbierende Komponente ein infrarotabsorbierendes Pigment ist.
  8. Ein durch die nachstehenden Schritte gekennzeichnetes Verfahren zur Herstellung einer lithografischen Druckplatte :
    bildmäßige Belichtung eines Bilderzeugungselements nach einem der Ansprüche 1 bis 7,
    Entwicklung des belichteten Bilderzeugungselements mit Leitungswasser oder einer wäßrigen Lösung.
  9. Ein durch die nachstehenden Schritte gekennzeichnetes Druckverfahren :
    Belichtung eines Bilderzeugungselements nach einem der Ansprüche 1 bis 7,
    Aufspannen des belichteten Bilderzeugungselements auf eine Druckpresse,
    Zuführen von Feuchtwasser auf das Bilderzeugungselement und nachher oder gleichzeitig damit Zuführen von Druckfarbe, und
    Drucken mit dem Bilderzeugungselement.
  10. Ein durch die nachstehenden Schritte gekennzeichnetes Druckverfahren :
    Aufspannen eines Bilderzeugungselements nach einem der Ansprüche 1 bis 7 auf eine Druckpresse,
    Belichten des aufgespannten Bilderzeugungselements,
    Zuführen von Feuchtwasser auf das Bilderzeugungselement und nachher oder gleichzeitig damit Zuführen von Druckfarbe, und
    Drucken mit dem Bilderzeugungselement.
EP19990200290 1999-02-01 1999-02-01 Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden Expired - Lifetime EP1025990B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69908543T DE69908543T2 (de) 1999-02-01 1999-02-01 Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden
EP19990200290 EP1025990B1 (de) 1999-02-01 1999-02-01 Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden
JP2000014382A JP2000218954A (ja) 1999-02-01 2000-01-24 向上した感度を有する感熱性材料
US09/495,324 US6300032B1 (en) 1999-02-01 2000-02-01 Heat-sensitive material with improved sensitivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19990200290 EP1025990B1 (de) 1999-02-01 1999-02-01 Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden

Publications (2)

Publication Number Publication Date
EP1025990A1 EP1025990A1 (de) 2000-08-09
EP1025990B1 true EP1025990B1 (de) 2003-06-04

Family

ID=8239854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990200290 Expired - Lifetime EP1025990B1 (de) 1999-02-01 1999-02-01 Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden

Country Status (3)

Country Link
EP (1) EP1025990B1 (de)
JP (1) JP2000218954A (de)
DE (1) DE69908543T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6300032B1 (en) * 1999-02-01 2001-10-09 Agfa-Gevaert Heat-sensitive material with improved sensitivity
JP2001162960A (ja) * 1999-12-06 2001-06-19 Fuji Photo Film Co Ltd 感熱性平版印刷版用原板
JP2001166459A (ja) 1999-12-06 2001-06-22 Fuji Photo Film Co Ltd 感熱性平版印刷用原板
JP2002219881A (ja) * 2001-01-24 2002-08-06 Fuji Photo Film Co Ltd 平版印刷版の製造法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0771645B1 (de) * 1995-10-31 2000-08-23 Agfa-Gevaert N.V. Auf der Druckpressentwicklung von lithographischen Druckplatten bestehend aus lichtempfindlichem Schichten mit Aryldiazosulphonatharzen
EP0773112B1 (de) * 1995-11-09 2001-05-30 Agfa-Gevaert N.V. Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer Druckform damit

Also Published As

Publication number Publication date
DE69908543D1 (de) 2003-07-10
JP2000218954A (ja) 2000-08-08
EP1025990A1 (de) 2000-08-09
DE69908543T2 (de) 2004-04-29

Similar Documents

Publication Publication Date Title
US6096471A (en) Heat sensitive imaging element for providing a lithographic printing plate
US6772687B2 (en) Method for the preparation of a lithographic printing plate
US6300032B1 (en) Heat-sensitive material with improved sensitivity
EP0774364B1 (de) Verfahren zur Herstellung einer Flachdruckplatte durch bildmässige Erwärmung eines Bildaufnahmeelements mittels eines Thermodruckkopfes
US5816162A (en) Method for making a lithographic printing plate by image-wise heating an imaging element using a thermal head
EP0849090A2 (de) Thermo-empfindliches Aufzeichnungselement zur Herstellung lithographischer Druckplatten mit verbesserten transportierenden Eigenschaften
US6124079A (en) Method for making a driographic printing plate involving the use of a heat-sensitive imaging element
EP0839647A1 (de) Verfahren zur Herstellung einer lithographischen Druckplatte mit verbesserten Druckfarbe-Aufnahme
EP0925916A1 (de) Rückstandsfreies Aufzeichnungselement ohne Materialabtrag für die Herstellung von Flachdruckplatten mit unterschiedlicher Farbdichte zwischen Bild und Nicht-Bild
EP0960729B1 (de) Wärmeempfindliches Aufzeichnungselement zur Herstellung lithographischer Druckplatten
US6210857B1 (en) Heat sensitive imaging element for providing a lithographic printing plate
EP0881096A1 (de) Wärmempfindliches Aufzeichnungselement und Verfahren zur Herstellung von Flachdruckplatten damit
EP0773113B1 (de) Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer lithographischen Druckform damit
US6214515B1 (en) Heat sensitive imaging element for providing a lithographic printing plate
EP0832739B1 (de) Verfahren zur Herstellung einer lithographischen Druckplatte unter Verwendung eines wärme-empfindlichen Materials
EP0960730B1 (de) Wärmeempfindliches Aufzeichnungselement zur Herstellung lithographischer Druckplatten
EP1266750A1 (de) Herstellungsverfahren zu einer lithographischen Druckplatte
US6071369A (en) Method for making an lithographic printing plate with improved ink-uptake
EP1025990B1 (de) Wärmeempfindfiches Material, Verfahren zur Herstellung von lithographischen Druckplatten und Druckverfahren, die diese verwenden
JP4257878B2 (ja) 画像及び非画像領域の間の色素濃度における差を有する平版印刷版を与えるための感熱性非−融蝕性で廃棄物のない画像形成要素
EP1065049B1 (de) Wärmeempfindliches Aufzeichnungselement mit einer Deckschicht zur Herstellung lithographischer Druckplatten
EP0967077B1 (de) Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung von Flachdruckformen damit
EP0976549B1 (de) Verarbeitungsfreie thermische Flachdruckplatte mit definierter Nanostruktur
US6503684B1 (en) Processless thermal printing plate with cover layer containing compounds with cationic groups
US6528237B1 (en) Heat sensitive non-ablatable wasteless imaging element for providing a lithographic printing plate with a difference in dye density between the image and non image areas

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010209

AKX Designation fees paid

Free format text: DE FR GB

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AGFA-GEVAERT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20020628

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69908543

Country of ref document: DE

Date of ref document: 20030710

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040305

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090115

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090115

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090114

Year of fee payment: 11

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20101029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100201