Patent application number | Description | Published |
20080206678 | RADIATION-SENSITIVE COMPOSITIONS AND ELEMENTS WITH BASIC DEVELOPMENT ENHANCERS - Radiation-sensitive compositions can be used to prepare positive-working imageable elements useful for example to make lithographic printing plates. The compositions include an aqueous alkaline solvent soluble polymeric binder that includes a phenolic resin (such as a novolak) or a poly(vinyl acetal). The compositions also include a developability-enhancing composition comprising one or more basic nitrogen-containing organic compounds. The radiation-sensitive composition can be coated as an imageable layer that further includes a radiation absorbing compound that is, for example, sensitive to infrared radiation. | 08-28-2008 |
20090004599 | RADIATION-SENSITIVE COMPOSITIONS AND ELEMENTS WITH SOLVENT RESISTANT POLY(VINYL ACETAL)S - A radiation-sensitive composition can be used to prepare positive-working imageable elements having improved solvent resistance and is useful for making lithographic printing plates. The composition includes an alkaline soluble polymeric binder that is a specific poly(vinyl acetal) that exhibits improved resistance to press chemicals, and a radiation absorbing compound. | 01-01-2009 |
20090162783 | RADIATION-SENSITIVE ELEMENTS WITH DEVELOPABILITY-ENHANCING COMPOUNDS - Positive-working imageable elements can be imaged and developed to prepare imaged elements such as lithographic printing plates. The imageable elements including an imageable layer that has one or more alkaline soluble polymeric binders and a developability-enhancing compound that is represented by Structure (DEC) or (DEC | 06-25-2009 |
20090197052 | METHOD OF IMAGING AND DEVELOPING POSITIVE-WORKING IMAGEABLE ELEMENTS - A method of making imaged elements such as lithographic printing plates is achieved by imagewise exposing a positive-working imageable element using energy of less than 300 mJ/cm | 08-06-2009 |
20090291387 | METHOD OF IMAGING AND DEVELOPING POSITIVE-WORKING IMAGEABLE ELEMENTS - A method of making imaged elements such as lithographic printing plates is achieved by imagewise exposing an infrared radiation-sensitive positive-working imageable element to provide exposed and non-exposed regions. The imaged element is developed using a single processing solution having a pH of from about 9 to about 11.5 and containing carbonate ion and at least 1 weight % of one or more anionic surfactants, to remove predominantly only the exposed regions to provide an image and to provide a protective coating on the imaged surface. The imageable element comprises a substrate and a radiation absorbing compound, and has an imageable layer on the substrate that comprises a developability-enhancing compound and a poly(vinyl acetal) in which at least 25 mol % of its recurring units comprise pendant nitro-substituted phenolic groups. | 11-26-2009 |
20090311626 | RADIATION-SENSITIVE COMPOSITIONS AND ELEMENTS WITH SOLVENT RESISTANT POLY(VINYL ACETAL)S - A radiation-sensitive composition can be used to prepare positive-working imageable elements having improved solvent resistance and is useful for making lithographic printing plates. The composition includes an alkaline soluble polymeric binder that is a specific poly(vinyl acetal) that exhibits improved resistance to press chemicals, and a radiation absorbing compound. | 12-17-2009 |
20100047723 | PROCESSING OF POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE PRECURSOR - Positive-working imageable elements can be imaged and processed using a processing solution that comprises at least 0.03 N of an organic amine or a mixture thereof, whose conjugated acids have a pKa greater than 9 and a boiling point greater than 150° C. The imageable element is a single-layer, infrared radiation-sensitive positive-working imageable element comprising a substrate and an infrared radiation absorbing compound. It also has an imageable layer that comprises a developability-enhancing compound and a poly(vinyl acetal) in which at least 25 mol % of its recurring units comprise pendant phenol, naphthol, or anthracenol groups that are substituted with one or more electron-withdrawing groups. | 02-25-2010 |
20100159390 | RADIATION-SENSITIVE COMPOSITIONS AND ELEMENTS CONTAINING POLY(VINYL HYDROXYARYL CARBOXYLIC ACID ESTER)S - A radiation-sensitive composition can be used to prepare positive-working imageable elements having improved sensitivity and solvent resistance. These elements are useful for making lithographic printing plates and printed circuit boards. The composition includes a water-insoluble polymeric binder that has at least 20 mol % of recurring units comprising hydroxyaryl carboxylic acid ester groups, some of which can be substituted with cyclic imide moieties. | 06-24-2010 |
20110059399 | POSITIVE-WORKING RADIATION-SENSITIVE IMAGEABLE ELEMENTS - Positive-working imageable elements having improved sensitivity, high resolution, and solvent resistance are prepared using a water-insoluble polymeric binder comprising vinyl acetal recurring units that have pendant hydroxyaryl groups, and recurring units comprising carboxylic acid aryl ester groups that are substituted with a cyclic imide group. These imageable elements can be imaged and developed to provide various types of elements including lithographic printing plates. | 03-10-2011 |
20120125216 | METHODS OF PROCESSING USING SILICATE-FREE DEVELOPER COMPOSITIONS - A method is used to prepare lithographic printing plates by developing positive-working lithographic printing plate precursor that has a single imageable layer that comprises a polymer binder having recurring units represented by Structure (Ib) below: | 05-24-2012 |
20120129093 | SILICATE-FREE DEVELOPER COMPOSITIONS - A silicate-free alkaline aqueous developer composition has a pH of at least 12 and comprises a hydroxide alkali agent, a metal cation M | 05-24-2012 |
20120129095 | SILICATE-FREE DEVELOPER COMPOSITIONS - A silicate-free alkaline aqueous developer composition has a pH of at least 12 and comprises a metal cation M | 05-24-2012 |
20130183622 | POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE PRECURSORS - A positive-working lithographic printing plate precursor has an outermost imageable layer that is present at a dry coverage weight of at least 0.7 g/m | 07-18-2013 |
20130224663 | Method of providing lithographic printing plates - A silicate-free alkaline aqueous developer composition has a pH of at least 12 and comprises a hydroxide alkali agent, a metal cation M | 08-29-2013 |