Patent application number | Description | Published |
20080206674 | Dual-Layer Heat-Sensitive Imageable Elements with a Polyvinyl Acetal Top Layer - Thermally imagable elements are described comprising on a substrate with hydrophilic surface (a) a first layer comprising a first polymer soluble or swellable in aqueous alkaline developer and insoluble in organic solvents with low polarity and (b) a second layer comprising a second polymer soluble or swellable in aqueous alkaline developer, wherein the first polymer is different from the second polymer and the second polymer comprises vinyl acetal repeating units and pendant acidic groups selected from COOH, —SO | 08-28-2008 |
20080227023 | PROCESSING POSITIVE-WORKING IMAGEABLE ELEMENTS WITH HIGH pH DEVELOPERS - A positive-working imageable element comprises inner and outer layers. The ink receptive outer layer includes a phenolic resin binder that is soluble in a developer having a pH greater than 11. Dissolution suppressing components for the phenolic resin binder are generally excluded from the outer layer or present at a very low amount. | 09-18-2008 |
20090017399 | IMAGEABLE ELEMENTS WITH LOW PH DEVELOPER SOLUBILITY - Single- and multi-layer positive-working imageable elements include an ink receptive outer layer includes a primary polymeric binder that is a poly(vinyl phenol) or a phenolic polymer having certain acidic groups. The use of this type of polymeric binder makes the imaged elements developable in low pH (11 or less) alkaline developers. | 01-15-2009 |
20090061352 | IMAGEABLE ELEMENTS WITH IMPROVED ABRASION RESISTANCE - Single- and multi-layer positive-working imageable elements include an ink receptive outer layer that includes inorganic, non-metallic, inert discrete particles, such as nano-sized silica, aluminum oxide, or titanium dioxide particles. The presence of these particles in the outermost layer improves the abrasion and scratch resistance of the elements. | 03-05-2009 |
20090142695 | IMAGEABLE ELEMENTS WITH COMPONENTS HAVING 1H-TETRAZOLE GROUPS - Radiation-sensitive compositions and imageable elements include a polymeric or non-polymeric component in an imageable layer, which component includes 1H-tetrazole groups. The non-polymeric components can be radically polymerizable compounds. The polymeric components can have 1H-tetrazole groups that are pendant to the backbone. The use of such components in negative- or positive-working imageable elements provides high photospeed and improved developability for providing imaged and developed elements, such as lithographic printing plates that show improved chemical resistance and run length. | 06-04-2009 |
20090202938 | METHOD OF IMPROVING SURFACE ABRASION RESISTANCE OF IMAGEABLE ELEMENTS - A computer-to-press multi-layer, positive-working imageable element has improved surface abrasion resistance from a micro-roughening of the outermost surface. This improvement is provided by spraying a solution consisting essentially of one or more dissolved organic resins in a solvent onto the outermost imageable layer of the imageable element. The one or more organic resins are soluble or dispersible in an aqueous alkaline solution and are present in the sprayed solution in an amount of at least 3 weight %. The sprayed solution is applied to deposit at least 10 mg/m | 08-13-2009 |
20090233227 | NEGATIVE-WORKING IMAGEABLE ELEMENTS WITH IMPROVED ABRASION RESISTANCE - Negative-working imageable elements are prepared with radiation-sensitive imageable layers that contain surface-modified silica particles such as fumed silica particles and sol-gel silica particles, that are present in an amount of from about 1 to about 40 weight %, have an average particle size of from about 1 to about 500 nm, have surface hydroxy groups, and have a carbon content of from about 0.5 to about 15 weight % that is derived from surface hydrophobic groups having 1 to 30 carbon atoms. The presence of the surface-modified silica particles provides improved abrasion resistance, reduced tackiness, and various other desired properties. | 09-17-2009 |
20090291395 | METHODS FOR IMAGING AND PROCESSING POSITIVE-WORKING IMAGEABLE ELEMENTS - An imaged and developed element, such as a lithographic printing plate, is provided by infrared radiation imaging of a positive-working imagable element having inner and outer imagable layers. One or both layers contain a polymeric binder having pendant 1H-tetrazole groups. The imaged element is developed with a single processing solution having a pH of from about 5 to about 11 to remove predominantly only the exposed regions and to provide a protective layer over the imaged surface. | 11-26-2009 |
20090317601 | Apparatus and method for treating imaging materials - An apparatus and method for improving the durability of an image on an imaging material, including increasing the press run length or a printing plate. The apparatus and method can involve the use of, as an example but not restricted to, an imaging device, a pre-bake oven, a processor, and a post-process treatment unit that employs infrared lamps adapted to irradiate the image. | 12-24-2009 |
20110097666 | LITHOGRAPHIC PRINTING PLATE PRECURSORS - Lithographic printing plate precursors can have an imageable layer that includes a polymeric binder having an acid number of 40 meq/g KOH or more, at least 3 weight % of recurring units derived from one or more N-alkoxymethyl (alkyl)acrylamides or alkoxymethyl(alkyl)acrylates, at least 2 weight % of recurring units having pendant 1H-tetrazole groups, and at least 10 weight % of recurring units having pendant cyano groups. The use of such polymeric binders provides good bakeability and chemical solvent resistance, especially for positive-working precursors. | 04-28-2011 |
20110223540 | GUMMING COMPOSITIONS WITH NANO-PARTICLES FOR IMPROVING SCRATCH SENSITIVITY IN IMAGE AND NON-IMAGE AREAS OF LITHOGRAPHIC PRINTING PLATES - The process for improving the scratch-resistance of a lithographic printing plate, comprising: applying an aqueous composition comprising inorganic, non-metallic, inert particles composed of silica, alumina or titanium dioxide and having an average particle size of from 1 nm to 0.5 μm, to an exposed and optionally developed lithographic printing plate precursor. | 09-15-2011 |
20110236832 | LITHOGRAPHIC PROCESSING SOLUTIONS AND METHODS OF USE - A lithographic processing solution having a pH of less than 12 and comprising at least 0.001 and up to and including 1 weight % of a water-soluble or water-dispersible, non-IR-sensitive compound that has a heterocyclic moiety with a quaternary nitrogen in the 1-position of the heterocyclic ring, and having one or more electron donating substituents attached to the heterocyclic ring, at least one of which electron donating substituents is attached in the 2-position. The processing solution can be used to develop both single-layer and multi-layer positive-working lithographic printing plate precursors that have been imaged using infrared radiation. | 09-29-2011 |
20120090486 | LITHOGRAPHIC PRINTING PLATE PRECURSORS AND METHODS OF USE - Negative-working, infrared radiation-sensitive lithographic printing plate precursors have an imageable layer on a substrate. The imageable layer includes a free radically polymerizable component, an initiator composition capable of generating free radicals upon exposure to infrared radiation, a polymeric binder, one or more infrared radiation absorbing compounds, and an inorganic phosphoric acid or inorganic phosphoric acid precursor. The lithographic printing plate precursors can be designed for either off-press or on-press development after IR imaging. | 04-19-2012 |
20120094233 | ON-PRESS DEVELOPABLE LITHOGRAPHIC PRINTING PLATE PRECURSORS - On-press developable, negative-working, infrared radiation-sensitive lithographic printing plate precursors have an imageable layer on a substrate. The imageable layer includes a free radically polymerizable component, an initiator composition capable of generating free radicals upon exposure to infrared radiation, a polymeric binder, a first infrared radiation absorbing compound that has a tetraaryl pentadiene chromophore, and a second infrared radiation absorbing compound that is different than the first infrared radiation absorbing compound. The first IR absorbing compound absorbs in both the IR and visible regions of the electromagnetic spectrum and provides coloration for visual inspection of the lithographic printing plates. | 04-19-2012 |
20120152139 | METHOD AND APPARATUS FOR DRYING AFTER SINGLE-STEP-PROCESSING OF LITHOGRAPHIC PRINTING PLATES - A method and apparatus for producing an imaged lithographic printing plate are described, wherein the method comprises single-step processing and drying from at least the printing side of the plate, wherein the drying step is carried out immediately after squeezing the processed plate. | 06-21-2012 |
20120270152 | ALUMINUM SUBSTRATES AND LITHOGRAPHIC PRINTING PLATE PRECURSORS - Electrochemically grained and anodized aluminum supports are treated with a post-treatment coating solution containing a polymer derived at least in part from vinyl phosphonic acid and phosphoric acid. This post-treated support is useful as substrates in the preparation of lithographic printing plate precursors. The post-treatment substrate treatment enables wide latitude in manufacturing and compatibility with silicate-free developers to achieve negligible background staining and oxide attack. | 10-25-2012 |
20130034815 | METHODS FOR PREPARING LITHOGRAHIC PRINTING PLATES - A lithographic processing solution has a pH of less than 12 and comprises at least 0.001 and up to and including 1 weight % of a water-soluble or water-dispersible, non-IR-sensitive compound that has a heterocyclic moiety with a quaternary nitrogen in the 1-position of the heterocyclic ring, and has one or more electron donating substituents attached to the heterocyclic ring, at least one of which electron donating substituents is attached in the 2-position. This processing solution can be used to develop both single-layer and multi-layer positive-working lithographic printing plate precursors that have been imaged using infrared radiation. | 02-07-2013 |
20130101939 | LITHOGRAPHIC PRINTING PLATE PRECURSORS - Lithographic printing plate precursors can have an imageable layer that includes a polymeric binder having an acid number of at least 30 mg KOH/g of polymer to and including 150 mg KOH/g of polymer, at least 3 weight % of recurring units derived from one or more N-alkoxymethyl (alkyl)acrylamides or alkoxymethyl (alkyl)acrylates, at least 2 weight % of recurring units having pendant 1H-tetrazole groups, and at least 10 weight % of recurring units having pendant cyano groups. The use of such polymeric binders provides good bakeability and chemical solvent resistance, especially for positive-working precursors. | 04-25-2013 |
20130239832 | POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE PRECURSORS - Infrared radiation-sensitive, positive-working lithographic printing plate precursors have improved scratch resistance in their outermost imageable layer because that layer comprises a unique combination of first and second alkali solution-soluble or -dispersible resins. The first alkali solution-soluble or -dispersible resin is an acid-functionalized novolak or acid-functionalized resole resin. The second alkali solution-soluble or -dispersible resin is a polyurethane or polyurethane urea comprising a polysiloxane unit segment in the polyurethane or polyurethane urea backbone or a side chain. | 09-19-2013 |
20130255515 | POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE PRECURSORS - A positive-working multi-layer lithographic printing plate precursor has an inner imageable layer disposed over a substrate. This inner imageable layer comprises one or more first polymeric binders that are present in a total amount of at least 50 weight % and up to and including 97 weight %, based on total inner imageable layer dry weight. The precursor also has an ink-receptive outer imageable layer disposed over the inner imageable layer and this ink-receptive outer imageable layer comprises one or more second polymeric binders that are different than the first polymeric binder. Each of the one or more first polymeric binders has a weight average molecular weight of at least 200,000 and can also have a polydispersity of at least 4. | 10-03-2013 |
20140047993 | ALUMINUM SUBSTRATES AND LITHOGRAPHIC PRINTING PLATE PRECURSORS - Electrochemically grained and anodized aluminum supports are treated with a post-treatment coating solution containing a polymer derived at least in part from vinyl phosphonic acid and phosphoric acid. This post-treated support is useful as substrates in the preparation of lithographic printing plate precursors. The post-treatment substrate treatment enables wide latitude in manufacturing and compatibility with silicate-free developers to achieve negligible background staining and oxide attack. | 02-20-2014 |
20140065539 | POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE PRECURSORS AND USE - A thermally-sensitive, positive-working lithographic printing plate precursor can be used to prepare lithographic printing plates using high pH, silicate-free processing solutions. The precursor has a grained an anodized aluminum-containing substrate including a poly(vinyl phosphonic acid) interlayer. A first ink receptive layer, and optionally a second ink receptive layer, is disposed directly on the poly(vinyl phosphonic acid) interlayer. This first ink receptive layer comprises an aromatic acid dye that comprises at least two aromatic groups in an amount of least 0.5 weight %. In addition, the precursor comprises an infrared radiation absorber in one of the layers. | 03-06-2014 |
20140141374 | NEGATIVE-WORKING LITHOGRAPHIC PRINTING PLATE PRECURSORS - A negative-working lithographic printing plate precursor is used for making lithographic printing plates from infrared radiation imaging. The precursor comprises free radical chemistry and a specific infrared radiation absorber that is a cyanine dye and defined by Formula (1a) described in the disclosure. This particular infrared radiation absorber provides both IR sensitivity and print out after imaging. | 05-22-2014 |
20140162187 | POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE - Positive-working lithographic printing plate precursors have an inner layer that includes a polymeric binder having an acid number of at least 30 mg KOH/g of polymer to and including 150 mg KOH/g of polymer, at least 3 weight % of recurring units derived from one or more N-alkoxymethyl(alkyl)acrylamides or alkoxymethyl(alkyl)acrylates, at least 2 weight % of recurring units having pendant 1H-tetrazole groups, and at least 10 weight % of recurring units having pendant cyano groups. The use of such polymeric binders in the inner layer provides good bakeability and chemical solvent resistance. Such positive-working lithographic printing plate precursors also include an outer layer disposed over the inner layer, which outer layer comprises an infrared radiation absorbing compound. | 06-12-2014 |
20140283703 | MAKING LITHOGRAPHIC PRINTING PLATES - A thermally-sensitive, positive-working lithographic printing plate precursor can be used to prepare lithographic printing plates using high pH, silicate-free processing solutions. The precursor has a grained an anodized aluminum-containing substrate including a poly(vinyl phosphonic acid) interlayer. A first ink receptive layer, and optionally a second ink receptive layer, is disposed directly on the poly(vinyl phosphonic acid) interlayer. This first ink receptive layer comprises an aromatic acid dye that comprises at least two aromatic groups in an amount of least 0.5 weight %. In addition, the precursor comprises an infrared radiation absorber in one of the layers. | 09-25-2014 |
20150072289 | POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE - Positive-working lithographic printing plate precursors have an inner layer that includes a polymeric binder having an acid number of at least 30 mg KOH/g of polymer to and including 150 mg KOH/g of polymer, at least 3 weight % of recurring units derived from one or more N-alkoxymethyl(alkyl)acrylamides or alkoxymethyl(alkyl)acrylates, at least 2 weight % of recurring units having pendant 1H-tetrazole groups, and at least 10 weight % of recurring units having pendant cyano groups. The use of such polymeric binders in the inner layer provides good bakeability and chemical solvent resistance. Such positive-working lithographic printing plate precursors also include an outer layer disposed over the inner layer, which outer layer comprises an infrared radiation absorbing compound. | 03-12-2015 |