EP0900653A1 - Positiv arbeitendes, IR-sensitives Gemisch, damit hergestelltes thermisch bebilderbares Aufzeichnungsmaterial sowie Verfahren zur Herstellung einer Druckform für den Offsetdruck - Google Patents
Positiv arbeitendes, IR-sensitives Gemisch, damit hergestelltes thermisch bebilderbares Aufzeichnungsmaterial sowie Verfahren zur Herstellung einer Druckform für den Offsetdruck Download PDFInfo
- Publication number
- EP0900653A1 EP0900653A1 EP98116562A EP98116562A EP0900653A1 EP 0900653 A1 EP0900653 A1 EP 0900653A1 EP 98116562 A EP98116562 A EP 98116562A EP 98116562 A EP98116562 A EP 98116562A EP 0900653 A1 EP0900653 A1 EP 0900653A1
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- EP
- European Patent Office
- Prior art keywords
- mixture
- mixture according
- recording material
- radiation
- pbw
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
-
- 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
-
- 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
- B41C1/1016—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 characterised by structural details, e.g. protective layers, backcoat layers or several imaging layers
-
- 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
- B41C2210/02—Positive working, i.e. the exposed (imaged) areas are removed
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- 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
- B41C2210/06—Developable by an alkaline 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
- B41C2210/20—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by inorganic additives, e.g. pigments, salts
-
- 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
-
- 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
- B41C2210/26—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 not involving carbon-to-carbon unsaturated bonds
- B41C2210/262—Phenolic condensation polymers, e.g. novolacs, resols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/41—Base layers supports or substrates
Definitions
- the present invention relates to a positive-working, IR-sensitive Mixture, a recording material with a support and a layer of this mixture and a method for producing a printing form from the Recording material.
- the radiation-sensitive layer in the ultraviolet and / or visible range is sensitive.
- the layer is imaged with radiation of the corresponding wavelength and then developed. Newer procedures come without one Movie template.
- Infrared lasers especially infrared laser diodes, are much cheaper.
- Besides materials are also known which are both in the UV / VIS and in the IR range are sensitized (EP-A 0 625 728 and 0 672 954).
- the radiation sensitive The layer of these materials contains an IR absorber, a resol, a novolak and a compound that produces an acid when irradiated.
- the at the imagewise exposure to photochemically formed acid causes crosslinking of resol and novolak on subsequent heating of the recording material.
- An aqueous alkaline developer solution can then be used Selectively remove unexposed areas of the layer.
- the recording material according to WO 96/20429 comprises a layer which an IR absorber and a 1,2-naphthoquinone-2-diazide sulfonic acid ester or carboxylic acid ester and a phenolic resin or an ester of a 1,2-naphthoquinone-2-diazide sulfonic acid or carboxylic acid and a phenolic resin contains.
- the entire surface is coated with UV radiation and then with IR laser beams exposed imagewise. Due to the action of IR rays certain areas of the layer that was initially solubilized become insoluble again. It is a negative working system. The processing of the Materials are therefore relatively complex.
- the radiation-sensitive layer a IR absorber (usually soot), a UV-sensitive diazo compound and a Contains binders.
- the material can therefore only be used with yellow safety light handle.
- the Eliminate white light sensitivity By adding a top layer, the Eliminate white light sensitivity. However, this requires an additional one Manufacturing step.
- the task is solved with a positive working, IR-sensitive mixture, which is insoluble in water but soluble in aqueous alkali or at least swellable binder and dispersed in such a binder Contains soot particles. However, it does not contain any components that are under the Exposure to UV / VIS radiation a significant change in the solubility of the Effect mixture or the layer produced therefrom in aqueous alkali.
- the present invention also relates to a recording material a layer support and a positive working, IR-sensitive layer this mixture.
- the dispersed soot particles form those for the imagewise Differentiation essential radiation sensitive component.
- “Pictorial Differentiation” in this context means that the solution speed the irradiated areas in an aqueous alkaline developer is so far above that of the non-irradiated areas that the irradiated areas when developing be removed completely while the non-irradiated Areas remain practically intact. Other components that are pictorial Differentiation are therefore not included in the mixture. In particular, no UV / VIS sensitive components are included.
- IR-sensitive is to be understood here - as is generally the case - that the Mixture or the layer formed therefrom for radiation with a wavelength from 700 to 1,100 nm is sensitive.
- Carbon black pigments are particularly suitable as IR-absorbing components because they absorb over a wide IR wavelength range. Both Nd-YAG lasers that work at a wavelength of 1064 nm and inexpensive laser diodes that work at 830 nm can therefore be used. Carbon black particles with an average primary particle diameter of 10 to 220 nm, particularly preferably 35 to 110 nm, and in particular 45 to 100 nm are preferred. According to DIN 53206, the term "primary particles" means the smallest particles (individual particles) from which pulverulent substances are built up are. They are recognizable as individual individuals by electron microscopy.
- Suitable carbon blacks are, in particular, flame black, furnace black, gas black or channel black as well as those which are produced by the thermal black process or the acetylene black process (cf. company lettering from Degussa AG "What is carbon black”).
- the surface area ("BET surface") of the soot particles determined by the method of Brunauer, Emmett and Teller is generally 5 to 500 m 2 per gram, preferably 8 to 250 m 2 per gram.
- Carbon blacks which have a dibutyl phthalate absorption of more than 30 ml per 100 g, in particular more than 40 ml per 100 g, and those which are oxidized on their surface, as a result of which acidic units are formed, are particularly suitable.
- Neutral carbon blacks are also suitable, as are carbon blacks with basic groups on the surface.
- the dispersion of the soot particles with the binder can in general known devices.
- the mixture of pigment and binder first dispersed in a dissolver and then in a Ball mill can be finely dispersed.
- the organic solvents used can be different from the actual coating solvents, however, they are preferably identical.
- Particularly suitable solvents are Propylene glycol monomethyl ether (PGME), propylene glycol monomethyl ether acetate (PGMEA), ethyl lactate, butanone, ⁇ -butyrolactone, tetrahydrofuran and Mixtures of these.
- PGME Propylene glycol monomethyl ether
- PMEA propylene glycol monomethyl ether acetate
- ethyl lactate ethyl lactate
- butanone ⁇ -butyrolactone
- tetrahydrofuran tetrahydrofuran and Mixtures of these.
- the proportion of soot particles is generally 1 to 50 wt .-%, preferably 3 to 15 wt .-%, each based on the Total weight of the non-volatile components of the layer.
- the IR radiation-sensitive mixture or the layer formed therefrom contains at least one polymeric binder.
- Examples include polycondensates as used in the implementation of Phenols or sulfamoyl- or carbamoyl-substituted aromatics with aldehydes or ketones.
- phenols can be used in addition to phenol also substituted phenols, such as resorcinol, cresol, xylenol or trimethylphenol.
- the aldehyde is preferably formaldehyde.
- Novolaks, especially Cresol / formaldehyde and cresol / xylenol / formaldehyde novolaks are special suitable polycondensates.
- Reaction products of diisocyanates are also suitable with diols or diamines as long as they are acidic units of the above Have kind.
- Polymers with vinyl aromatic units, N-aryl (meth) acrylamides or aryl (meth) acrylates, these Units each have one or more carboxyl groups, phenolic Have hydroxyl groups, sulfamoyl or carbamoyl groups.
- the polymers can additionally Units from other monomers which have no acidic groups, contain.
- the proportion of the binder is generally 50 to 99% by weight, preferably 85 to 97% by weight, based in each case on the total weight of the non-volatile Components of the layer. In a particularly preferred embodiment there is at least 50% by weight of the binder, in particular 80% by weight or more, from novolak.
- the mixture or the radiation-sensitive layer also contains compounds which improve the resistance to the developer and / or processing chemicals (these include the fountain solution used in printing, plate cleaners, etc.) and / or compounds which control the development speed.
- Suitable to increase resistance to aqueous alkaline developers are, for example, ketones (especially diaryl ketones such as benzophenone and naphthalin-2-yl-phenyl ketone), quinones (especially phenanthrenequinone), indenones (especially 2,3-diphenylindenone), chromen-4-one (especially 3-phenyl-chromen-4-one, ⁇ - and ⁇ - naphthoflavone), xanthone, Meldrum's acid, sulfones (especially diphenyl sulfone) and sulfonic acid esters (especially para-toluenesulfonic acid phenyl ester and naphthalene-1-sulfonic acid phenyl ester).
- polymeric compounds such as polyphthalaldehyde, polyethylene glycol, polypropylene glycol, poly (4-hydroxystyrene) with protected hydroxyl groups, poly (meth) acrylate or nitrocellulose can also be used.
- the proportion of these compounds is generally 0.5 to 20.0% by weight, preferably 1.0 to 10.0% by weight, in each case based on the total weight of the nonvolatile constituents of the mixture or of the layer.
- connections are generally used to control the development speed, which are better or faster soluble in the aqueous alkaline developer than the binder itself.
- polymeric compounds can control the rate of development, particularly Those with an acid number of more than 100 are to be mentioned here Copolymers with a sufficient number of (meth) acrylic acid units as well as partially saponified polyvinyl acetals, their free, non-acetalized hydroxy groups are modified with acidic residues.
- the proportion of these connections is generally 0.5 to 20.0% by weight, preferably 1.0 to 10.0% by weight, each based on the total weight of the non-volatile components of the Mixture or the layer.
- the radiation-sensitive layer can also contain minor amounts of other additives that are common in such layers. These include dyes and surfactants (preferably fluorine-containing surfactants or silicone surfactants).
- the layer can also contain other IR absorbers, such as squarylium, cyanine, merocyanine or pyrylium compounds. Compounds that form acid under the action of IR radiation may also be present. These include, for example, para- quinonediiminium dyes, such as ®Cyasorb IR-165 from American Cyanamid.
- the other IR absorbers are not present in such quantities that they would be capable of effecting sufficient image-related differentiation on their own. Their proportion should not exceed 40% by weight, preferably not more than 20% by weight, in each case based on the total weight of the soot particles.
- the support in the recording material according to the invention is preferred a foil or plate made of aluminum or an aluminum alloy or a composite of an aluminum and a polyester film.
- the aluminum surface is preferably mechanically and / or electrochemically roughened and anodized. You can also use a suitable, usually polymeric compound, be hydrophilized. Are well suited for this purpose Compounds with phosphonic acid or phosphonate units, in particular Polyvinylphosphonic acid.
- the actual roughening can be degreased, optionally also a further mechanical and / or chemical Roughening upstream.
- the IR radiation-sensitive layer generally has a layer weight of 0.5 to 5.0 g / m 2 , preferably 1.0 to 3.0 g / m 2 , corresponding to about 0.5 to 5.0 ⁇ m, preferred about 1.0 to 3.0 ⁇ m.
- the top layer generally consists of water-soluble polymers Binders, such as polyvinyl alcohol, polyvinyl pyrrolidone, partially saponified polyvinyl acetates, Gelatin, carbohydrates or hydroxyethyl cellulose. It is permeable for IR and UV / VIS radiation.
- Binders such as polyvinyl alcohol, polyvinyl pyrrolidone, partially saponified polyvinyl acetates, Gelatin, carbohydrates or hydroxyethyl cellulose. It is permeable for IR and UV / VIS radiation.
- a corresponding recording material with a UV / VIS-impermeable cover layer is in the simultaneously submitted Application DE-A 197 39 299.
- the cover layer is made from a aqueous solution or dispersion, which may also contain small amounts organic solvents, i.e. less than 5% by weight based on the total weight the coating solvent for the top layer.
- the thickness of the cover layer is generally up to 5 ⁇ m, preferably 0.1 to 3.0 ⁇ m.
- the recording material according to the invention generally contains no more layers.
- the present invention also relates to a method for Production of a printing form for offset printing from the invention Recording material.
- the recording material first irradiated with infrared radiation and then in one usual aqueous alkaline developer at a temperature of 20 to 40 ° C. developed.
- the water-soluble that may be present Removed top layer.
- the cover layer is processed before or after imaging with IR rays, however, before development, removed with water.
- Particularly suitable for imaging with infrared rays, external or internal drum imagesetters are included Laser diodes (maximum emission 830 nm) or Nd-YAG laser (maximum emission 1064 nm).
- the one required for visual differentiation Radiation energy is chosen so that after development a fog-free Picture arises. This means that the layer in the irradiated areas after development is completely removed. Irradiation, if any, at most a small proportion of the IR-sensitive layer is removed.
- the invention Recording material is also characterized by a relative large "exposure latitude”. That means it is only "overexposed" at Radiation with very high energy.
- Silicate-based developers which have a ratio of SiO 2 to alkali oxide of at least 1 are preferred. This ensures that the aluminum oxide layer of the carrier is not damaged.
- Preferred alkali oxides are Na 2 O and K 2 O, and mixtures thereof.
- the developer can contain further components, such as buffer substances, complexing agents, defoamers, organic solvents in small amounts, corrosion inhibitors, dyes, surfactants and / or hydrotropes.
- the development mostly takes place in machine processing plants.
- the coating solution was spin-coated onto a solution in hydrochloric acid roughened, anodized in sulfuric acid and with polyvinylphosphonic acid hydrophilized aluminum foil applied. After drying for 2 min at 100 ° C the layer thickness was 2 ⁇ m.
- the thermal imaging was then carried out using a digital raster template in an external drum imagesetter with an IR laser diode bar (emission maximum: 830 nm; power of each individual diode: 40 mW, writing speed: 1 m / s: beam width: 10 ⁇ m). It was irradiated with an energy of 400 mJ / cm 2 .
- Example 2 The thermal imaging was then carried out as in Example 1.
- the radiation energy was 150 mJ / cm 2 . In this way, a fog-free image was obtained.
- the dot size and printing properties of the printing form thus obtained were practically identical to those from Example 2.
- a carrier material according to Example 1 was coated as described there and irradiated with IR imagewise. An irradiation energy of 250 mJ / cm 2 is sufficient to obtain a fog-free image. Developer resistance was significantly improved. With the printing form thus obtained, more than 50,000 flawless prints could be made.
- the dispersion was spun onto the aluminum support known from Example 1 and then dried.
- the recording material thus obtained was also imaged as in Example 1.
- An irradiation energy of 450 mJ / cm 2 a fog-free image was obtained after development.
- the material showed a significantly improved resistance to the developer. With the printing form obtained from this, more than 50,000 perfect prints could be produced.
- the dispersion was spun onto the aluminum support known from Example 1 and then dried.
- the recording material thus obtained was also imaged as in Example 1.
- An irradiation energy of 250 mJ / cm 2 a fog-free image was obtained after development.
- the material showed a significantly better resistance to the developer. With the printing form obtained from this, more than 50,000 perfect prints could be produced.
- the coating dispersion was then spun onto an aluminum support in accordance with Example 1 and dried analogously to Example 1.
- the weight of the dried layer was 2 g / m 2 .
- the tonal range of the printing form produced in this way was 2 to 98% of a 60s Grid.
- Examples 1 to 7 were repeated with the difference that the radiation-sensitive layer by spin coating still a 7% solution a polyvinyl alcohol (88% hydrolyzed, 12% of the hydroxy groups are still acetylated; Viscosity 4 mPa s, measured on a 4% aqueous solution; ®Mowiol 4-88 from Hoechst AG) was applied. After drying for 2 min at 100 ° C, the thickness of the top layer thus produced was 1 to 3 microns. The pictorial IR radiation was practically without, as with the recording materials Top layer, only a slightly higher laser power was required. The Development time had to be extended by about 20%, one at a time to get comparable printing form.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Printing Plates And Materials Therefor (AREA)
- Materials For Photolithography (AREA)
Abstract
Description
- 11,0 Gt
- Rußdispersion der im folgenden angegebenen Zusammensetzung,
- 12,0 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400 von Vianova Resins GmbH, 45,3%ig in Propylenglykol-monomethylether-acetat),
- 52,0 Gt
- Propylenglykol-monomethylether (PGME) und
- 25,0 Gt
- Tetrahydrofuran.
- 10,0 Gt
- Ruß (®Printex 25),
- 59,99 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 30,0 Gt
- PGME und
- 0,01 Gt
- Silikonöl.
- 11,00 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 0,35 Gt
- 2,3,4-Trihydroxy-benzophenon,
- 11,00 Gt
- Rußdispersion (wie im Beispiel 1),
- 52,65 Gt
- PGME und
- 25,00 Gt
- Tetrahydrofuran.
- 9,70 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 0,80 Gt
- Poly(4-hydroxy-styrol) mit einem Mw von 4.000 bis 6.000 und einem Mn von 2.100 bis 3.100 (®Maruka Lyncur M, Typ S-2, von Maruzen Petrochemical Co., Ltd.),
- 8,00 Gt
- Rußdispersion (wie im Beispiel 1),
- 50,00 Gt
- PGME und
- 31,50 Gt
- Tetrahydrofuran.
- 8,60 Gt
- Rußdispersion der im folgenden angegebenen Zusammensetzung,
- 9,60 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3 %ig in PGMEA),
- 0,40 Gt
- Polymethacrylat-Harz (®Elvacite 2013 von DuPont de Nemours),
- 1,40 Gt
- Poly(4-hydroxy-styrol) (®Maruka Lyncur M, Typ S-2),
- 0,01 Gt
- Silikonöl zur Verbesserung der Oberflächenstruktur,
- 49,99 Gt
- PGME und
- 30,00 Gt
- Tetrahydrofuran.
- 5,00 Gt
- Ruß (Spezialschwarz 250 der Degussa AG),
- 66,00 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 28,99 Gt
- PGME und
- 0,01 Gt
- Silikonöl.
- 8,50 Gt
- Rußdispersion der im folgenden angegebenen Zusammensetzung,
- 11,00 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 0,40 Gt
- Benzophenon,
- 0,01 Gt
- Silikonöl,
- 49,99 Gt
- PGME und
- 30,00 Gt
- Tetrahydrofuran.
- 5,00 Gt
- Ruß (Spezialschwarz 250),
- 66,00 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 28,99 Gt
- PGME und
- 0,01 Gt
- Silikonöl.
- 8,00 Gt
- Rußdispersion der im folgenden angegebenen Zusammensetzung,
- 11,58 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 0,15 Gt
- Nitrocellulose (Walsroder Nitrocellulose E 330 von Wolff Walsrode AG),
- 0,26 Gt
- Poly(4-hydroxy-styrol) (®Maruka Lyncur M, Typ S-2),
- 0,01 Gt
- Silikonöl zur Verbesserung der Oberflächenstruktur,
- 54,00 Gt
- PGME und
- 26,00 Gt
- Tetrahydrofuran.
- 5,00 Gt
- Ruß (Spezialschwarz 250),
- 66,00 Gt
- Cresol/Xylenol/Formaldehyd-Novolak (®Alnovol SPN 400, 45,3%ig in PGMEA),
- 28,99 Gt
- PGME und
- 0,01 Gt
- Silikonöl.
- 34,00 Gt
- Rußdispersion (wie in Beispiel 4 beschrieben),
- 6,70 Gt
- Poly(4-hydroxy-styrol), worin 30 % der Hydroxygruppen in tert.-Butoxycarbonyloxygruppen und 15 % in 2,3-Dihydroxy-propoxy-Gruppen umgewandelt waren (Herstellung siehe EP-A 683 435),
- 0,01 Gt
- Silikonöl,
- 42,00 Gt
- PGME und
- 34,00 Gt
- Tetrahydrofuran.
- 5,5 Gt
- Natriumsilikat-nonahydrat,
- 3,4 Gt
- Trinatriumphosphat-dodecahydrat,
- 0,4 Gt
- Mononatriumphosphat (wasserfrei) und
- 90,7 Gt
- vollentsalztem Wasser.
Claims (17)
- Positiv arbeitendes, IR-sensitives Gemisch, das ein in Wasser unlösliches, in wäßrigem Alkali dagegen lösliches, zumindest quellbares Bindemittel und in einem solchen Bindemittel dispergierte Rußpartikel umfaßt, wobei die dispergierten Rußpartikel die für die bildmäßige Differenzierung wesentliche strahlungsempfindliche Komponente bilden.
- Gemisch gemäß Anspruch 1, dadurch gekennzeichnet, daß die Rußpartikel einen mittleren Primärteilchendurchmesser von 10 bis 220 nm, bevorzugt 35 bis 110 nm, besonders bevorzugt 45 bis 100 nm, aufweisen.
- Gemisch gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die BET-Oberfläche der Rußpartikel bei 5 bis 500 m2/g, bevorzugt 8 bis 250 m2/g, beträgt.
- Gemisch gemäß einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Anteil der Rußpartikel 1 bis 50 Gew.-%, bevorzugt 3 bis 15 Gew.-%, beträgt, jeweils bezogen auf das Gesamtgewicht der nichtflüchtigen Bestandteile des Gemisches.
- Gemisch gemäß einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Bindemittel acide Gruppen mit einem pKs-Wert von weniger als 13 enthält.
- Gemisch gemäß Anspruch 5, dadurch gekennzeichnet, daß das Bindemittel ein Polykondensationsprodukt ist aus Phenolen oder sulfamoyl- oder carbamoyl-substituierten Aromaten mit Aldehyden oder Ketonen, ein Umsetzungsprodukt von Diisocyanaten mit Diolen oder Diaminen oder ein Polymer mit Einheiten aus Vinylaromaten, N-Aryl-(meth)acrylamiden oder Aryl-(meth)acrylaten, wobei diese Einheiten jeweils noch eine oder mehrere Carboxylgruppen, phenolische Hydroxygruppen, Sulfamoyl- oder Carbamoylgruppen enthalten.
- Gemisch gemäß Anspruch 6, dadurch gekennzeichnet, daß das Polykonsationsprodukt ein Novolak, bevorzugt ein Cresol/Formaldehyd- oder ein Cresol/Xylenol/Formaldehyd-Novolak, ist, wobei der Anteil an Novolak bevorzugt mindestens 50 Gew.-%, besonders bevorzugt mindestens 80 Gew.-%, beträgt, bezogen auf das Gesamtgewicht aller Bindemittel.
- Gemisch gemäß einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Anteil des Bindemittels 50 bis 99 Gew.-%, bevorzugt 85 bis 97 Gew.-%, beträgt, jeweils bezogen auf das Gesamtgewicht der nichtflüchtigen Bestandteile des Gemisches.
- Gemisch gemäß einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die strahlungsempfindliche Schicht zusätzlich mindestens eine Verbindung enthält, die ihre Resistenz gegenüber wäßrig-alkalischen Entwicklern und/oder Verarbeitungschemikalien erhöht, wobei deren Anteil bevorzugt 0,5 bis 20,0 Gew.-%, besonders bevorzugt 1,0 bis 10,0 Gew.-% beträgt, jeweils bezogen auf das Gesamtgewicht der nichtflüchtigen Bestandteile des Gemisches.
- Gemisch gemäß Anspruch 9, dadurch gekennzeichnet, daß die Verbindung, die zur Erhöhung der Resistenz dient, ein Keton, ein Chinon, ein Indenon, ein Chromen-4-one, Xanthon, Meldrumsäure, ein Sulfon, ein Sulfonsäureester, ein Polyphthalaldehyd, Nitrocellulose, Polyethylenglykol, Polypropylenglykol, ein Poly(4-hydroxy-styrol) mit geschützten Hydroxygruppen oder ein Poly(meth)acrylat ist.
- Gemisch gemäß einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß es zusätzlich mindestens eine Verbindung enthält, die die Entwicklungsgeschwindigkeit steuert, wobei deren Anteil bevorzugt 0,5 bis 20,0 Gew.-%, besonders bevorzugt 1,0 bis 10,0 Gew,-%, beträgt, jeweils bezogen auf das Gesamtgewicht der nichtflüchtigen Bestandteile des Gemisches.
- Gemisch gemäß Anspruch 9, dadurch gekennzeichnet, daß die zur Steuerung der Entwicklungsgeschwindigkeit dienende Verbindung ein Polyhydroxyaromat, eine aromatische Mono-, Di- oder Polycarbonsäure, eine aliphatische Di- oder Polycarbonsäure, eine Sulfonsäure, eine Verbindung mit N-H acider Gruppe oder ein Polymer mit einer Säurezahl von mehr als 100 ist.
- Aufzeichnungsmaterial mit einem Träger und einer strahlungsempfindlichen Schicht, dadurch gekennzeichnet, daß die Schicht aus einem Gemisch gemäß einem oder mehreren der Ansprüche 1 bis 12 besteht.
- Aufzeichnungsmaterial gemäß Anspruch 13, dadurch gekennzeichnet, daß sich auf der strahlungsempfindlichen Schicht eine Deckschicht aus mindestens einem wasserlöslichen polymeren Bindemittel befindet, wobei die Deckschicht bevorzugt eine Dicke bis zu 5,0 µm, besonders bevorzugt von 0,1 bis 3,0 µm, aufweist.
- Aufzeichnungsmaterial gemäß Anspruch 14, dadurch gekennzeichnet, daß das wasserlösliche polymere Bindemittel Polyvinylalkohol, Polyvinylpyrrolidon, teilverseiftes Polyvinylacetat, Gelatine, ein Kohlenhydrat oder Hydroxyethyl-cellulose ist.
- Aufzeichnungsmaterial gemäß einem oder mehreren der Ansprüche 13 bis 15, dadurch gekennzeichnet, daß der Schichtträger eine Aluminiumfolie oder -platte oder ein Verbund aus einer Aluminium- und einer Polyesterfolie ist, wobei die Aluminiumoberfläche vorzugsweise mechanisch und/oder elektrochemisch aufgerauht und anodisch oxidiert, besonders bevorzugt zusätzlich auch noch hydrophiliert ist.
- Verfahren zur Herstellung einer Druckform für den Offsetdruck, dadurch gekennzeichnet, daß man ein Aufzeichnungsmaterial gemäß einem oder mehreren der Ansprüche 13 bis 16 mit Infrarotstrahlung, bevorzugt mit Infrarot-Laserstrahlung, bildmäßig bestrahlt und anschließend in einem üblichen wäßrig-alkalischen Entwickler bei einer Temperatur von 20 bis 40 °C entwickelt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19739302 | 1997-09-08 | ||
DE19739302A DE19739302A1 (de) | 1997-09-08 | 1997-09-08 | Positiv arbeitendes IR-sensitives Gemisch, damit hergestelltes thermisch bebilderbares Aufzeichnungsmaterial sowie Verfahren zur Herstellung einer Druckform für den Offsetdruck |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0900653A1 true EP0900653A1 (de) | 1999-03-10 |
EP0900653B1 EP0900653B1 (de) | 2002-02-27 |
Family
ID=7841599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98116562A Expired - Lifetime EP0900653B1 (de) | 1997-09-08 | 1998-09-02 | Thermisch bebilderbares Aufzeichnungsmaterial mit einer Schicht aus einem positiv arbeitenden, IR-sensitiven Gemisch sowie Verfahren zur Herstellung einer Druckform für den Offsetdruck |
Country Status (4)
Country | Link |
---|---|
US (1) | US20020009671A1 (de) |
EP (1) | EP0900653B1 (de) |
JP (1) | JPH11147378A (de) |
DE (2) | DE19739302A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1023994A1 (de) * | 1999-01-26 | 2000-08-02 | Agfa-Gevaert N.V. | Wärmeempfindliches Bildaufzeichnungsmaterial zur Herstellung von positiv arbeitenden Flachdruckformen |
EP1162063A2 (de) | 2000-06-05 | 2001-12-12 | Fuji Photo Film Co., Ltd. | Flachdruckplattenvorläufer |
WO2002034517A1 (en) * | 2000-10-26 | 2002-05-02 | Kodak Polychrome Graphics Company, Ltd. | Compositions comprising a pigment |
US6472119B1 (en) | 1999-01-26 | 2002-10-29 | Agfa-Gavaert | Heat mode sensitive imaging element for making positive working printing plates |
US6670092B2 (en) | 2001-03-06 | 2003-12-30 | Agfa-Gevaert | Radiation-sensitive recording material having an electrically conductive back coating |
US6936404B2 (en) | 2000-12-20 | 2005-08-30 | Agfa-Gevaert | Radiation-sensitive recording material having a structured back |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19803564A1 (de) | 1998-01-30 | 1999-08-05 | Agfa Gevaert Ag | Polymere mit Einheiten aus N-substituiertem Maleimid und deren Verwendung in strahlungsempfindlichen Gemischen |
US6558787B1 (en) | 1999-12-27 | 2003-05-06 | Kodak Polychrome Graphics Llc | Relation to manufacture of masks and electronic parts |
US6673514B2 (en) * | 2001-09-07 | 2004-01-06 | Kodak Polychrome Graphics Llc | Imagable articles and compositions, and their use |
US6949327B2 (en) * | 2003-07-09 | 2005-09-27 | Kodak Polychrome Graphics Llc | On-press developable lithographic printing plate |
US7205084B2 (en) * | 2003-12-18 | 2007-04-17 | Agfa-Gevaert | Heat-sensitive lithographic printing plate precursor |
EP1543959B1 (de) | 2003-12-18 | 2009-07-15 | Agfa Graphics N.V. | Wärmeempfindlicher lithographischer Druckplattevorläufer |
US8283101B2 (en) * | 2007-08-30 | 2012-10-09 | Eastman Kodak Company | Imageable elements with improved abrasion resistance |
US20130233190A1 (en) * | 2012-03-06 | 2013-09-12 | Presstek, Inc. | Lithographic imaging and printing with positive-working photoresponsive printing members |
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US3645733A (en) * | 1968-03-27 | 1972-02-29 | Agfa Gevaert Nv | Subtitling of processed photographic materials |
GB1489308A (en) * | 1974-03-18 | 1977-10-19 | Scott Paper Co | Laser imagable dry planographic printing plate blank |
JPS5669192A (en) * | 1979-11-09 | 1981-06-10 | Konishiroku Photo Ind Co Ltd | Heat-sensitive recording material |
GB2077452A (en) * | 1980-04-22 | 1981-12-16 | Konishiroku Photo Ind | A heat mode recording material and a recording method using it |
JPH09120157A (ja) * | 1995-10-25 | 1997-05-06 | Fuji Photo Film Co Ltd | 湿し水不要感光性平版印刷版 |
EP0773112A1 (de) * | 1995-11-09 | 1997-05-14 | Agfa-Gevaert N.V. | Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer Druckform damit |
EP0780239A2 (de) * | 1995-12-19 | 1997-06-25 | Fuji Photo Film Co., Ltd. | Negativarbeitendes Bildaufzeichnungsmaterial |
EP0819980A1 (de) * | 1996-07-19 | 1998-01-21 | Agfa-Gevaert N.V. | IR-Strahlungsempfindliches Bildaufzeichnungselement und Verfahren zur Herstellung von lithographischen Druckplatten mit diesem Element |
EP0867278A1 (de) * | 1997-03-24 | 1998-09-30 | Agfa-Gevaert AG | Strahlungsempfindliches Gemisch und damit hergestelltes Aufzeichnungsmaterial für Offsetdruckplatten |
-
1997
- 1997-09-08 DE DE19739302A patent/DE19739302A1/de not_active Withdrawn
-
1998
- 1998-09-02 DE DE59803175T patent/DE59803175D1/de not_active Expired - Fee Related
- 1998-09-02 EP EP98116562A patent/EP0900653B1/de not_active Expired - Lifetime
- 1998-09-08 US US09/149,217 patent/US20020009671A1/en not_active Abandoned
- 1998-09-08 JP JP10254354A patent/JPH11147378A/ja active Pending
Patent Citations (10)
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US3645733A (en) * | 1968-03-27 | 1972-02-29 | Agfa Gevaert Nv | Subtitling of processed photographic materials |
GB1489308A (en) * | 1974-03-18 | 1977-10-19 | Scott Paper Co | Laser imagable dry planographic printing plate blank |
JPS5669192A (en) * | 1979-11-09 | 1981-06-10 | Konishiroku Photo Ind Co Ltd | Heat-sensitive recording material |
GB2077452A (en) * | 1980-04-22 | 1981-12-16 | Konishiroku Photo Ind | A heat mode recording material and a recording method using it |
JPH09120157A (ja) * | 1995-10-25 | 1997-05-06 | Fuji Photo Film Co Ltd | 湿し水不要感光性平版印刷版 |
US5786125A (en) * | 1995-10-25 | 1998-07-28 | Fuji Photo Film Co., Ltd. | Light-sensitive lithographic printing plate requiring no fountain solution |
EP0773112A1 (de) * | 1995-11-09 | 1997-05-14 | Agfa-Gevaert N.V. | Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer Druckform damit |
EP0780239A2 (de) * | 1995-12-19 | 1997-06-25 | Fuji Photo Film Co., Ltd. | Negativarbeitendes Bildaufzeichnungsmaterial |
EP0819980A1 (de) * | 1996-07-19 | 1998-01-21 | Agfa-Gevaert N.V. | IR-Strahlungsempfindliches Bildaufzeichnungselement und Verfahren zur Herstellung von lithographischen Druckplatten mit diesem Element |
EP0867278A1 (de) * | 1997-03-24 | 1998-09-30 | Agfa-Gevaert AG | Strahlungsempfindliches Gemisch und damit hergestelltes Aufzeichnungsmaterial für Offsetdruckplatten |
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PATENT ABSTRACTS OF JAPAN vol. 005, no. 135 (M - 085) 27 August 1981 (1981-08-27) * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1023994A1 (de) * | 1999-01-26 | 2000-08-02 | Agfa-Gevaert N.V. | Wärmeempfindliches Bildaufzeichnungsmaterial zur Herstellung von positiv arbeitenden Flachdruckformen |
US6472119B1 (en) | 1999-01-26 | 2002-10-29 | Agfa-Gavaert | Heat mode sensitive imaging element for making positive working printing plates |
EP1162063A2 (de) | 2000-06-05 | 2001-12-12 | Fuji Photo Film Co., Ltd. | Flachdruckplattenvorläufer |
EP1162063A3 (de) * | 2000-06-05 | 2003-11-05 | Fuji Photo Film Co., Ltd. | Flachdruckplattenvorläufer |
WO2002034517A1 (en) * | 2000-10-26 | 2002-05-02 | Kodak Polychrome Graphics Company, Ltd. | Compositions comprising a pigment |
US6936404B2 (en) | 2000-12-20 | 2005-08-30 | Agfa-Gevaert | Radiation-sensitive recording material having a structured back |
US6670092B2 (en) | 2001-03-06 | 2003-12-30 | Agfa-Gevaert | Radiation-sensitive recording material having an electrically conductive back coating |
Also Published As
Publication number | Publication date |
---|---|
EP0900653B1 (de) | 2002-02-27 |
JPH11147378A (ja) | 1999-06-02 |
DE59803175D1 (de) | 2002-04-04 |
DE19739302A1 (de) | 1999-03-11 |
US20020009671A1 (en) | 2002-01-24 |
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