Patent application number | Description | Published |
20080299491 | HIGHLY ALKALINE DEVELOPER COMPOSITION AND METHODS OF USE - A highly alkaline developer composition includes an alkali silicate, an alkyl sulfate, and a water-soluble or water-dispersible polyhydroxy compound such as glycerin. The developer composition is useful for processing imaged elements to produce lithographic printing plates with reduced etching of the aluminum substrates that have been coated with hydrophilic polymers such as poly(vinyl phosphonic acid) and with minimal sludging in the developer tank. | 12-04-2008 |
20080318162 | USE OF HIGHLY ALKALINE DEVELOPER REGENERATOR COMPOSITION - A method for providing a lithographic printing plate includes developing an exposed imageable element with an alkali silicate-containing developer composition having a pH of at least 12.0. The developer composition is regenerated by adding to it an alkali silicate-containing regenerator composition having a pH of at least 12.0. Conductivity of both the developer and regenerator compositions is suppressed from the presence of one or more conductivity reducing agents (such as glycerin). This conductivity suppression in the developer composition is greater than the suppression of the conductivity of the regenerator composition. | 12-25-2008 |
20090098482 | METHODS FOR IMAGING AND PROCESSING NEGATIVE-WORKING IMAGEABLE ELEMENTS - An imaged and developed element, such as a lithographic printing plate, is provided by infrared radiation imaging of a negative-working imageable element having an outermost imageable layer that includes a free radically polymerizable component, a free radical initiator composition comprising a diaryliodonium borate, and an infrared radiation absorbing compound. The imageable layer also includes a polymeric binder that is represented by the following Structure (I): | 04-16-2009 |
20090111051 | NEGATIVE-WORKING IMAGEABLE ELEMENTS AND METHODS OF USE - A negative-working imageable composition and element includes an initiator composition, an infrared radiation absorbing compound, a polymeric binder, and a stabilizing composition. The imaged element can be developed on-press and exhibits improved shelf-life under high humidity conditions. The stabilizing composition comprising at least one compound represented by Structure (ST-I) and at least one compound represented by Structure (ST-II): | 04-30-2009 |
20090142702 | METHODS OF USING VIOLET-SENSITIVE IMAGEABLE ELEMENTS - An imaged and developed element, such as a lithographic printing plate, is provided by violet radiation imaging of a negative-working imageable element having an outermost imageable layer that includes a free radically polymerizable component, an initiator composition that provides free radicals upon violet irradiation, a sensitizer, and a polymeric binder having pendant reactive vinyl groups. The element also includes an additive that is represented by the following Structure (II): | 06-04-2009 |
20090186299 | Methods for imaging and processing negative-working imageable elements - An imaged and developed element, such as a lithographic printing plate, is provided by infrared radiation imaging of a negative-working imageable element having a free radically polymerizable component, a free radical initiator composition, an infrared radiation absorbing compound, and adhesion promoter that is an organic compound having an ethylenically unsaturated carbon-carbon double bond that is connected to an alkoxysilyl or hydroxysilyl group. The use of the adhesion promoter provides increased printing durability for the imaged and developed element, especially those having sulfuric acid-anodized aluminum substrates. | 07-23-2009 |
20090311482 | SUBSTRATE AND IMAGEABLE ELEMENT WITH HYDROPHILIC INTERLAYER - A substrate useful for forming lithographic printing plate precursors includes a metal or polymer support and an interlayer comprising a trialkoxysilyl polyethylene glycol acrylate having the following Structure (I): | 12-17-2009 |
20100055414 | NEGATIVE-WORKING IMAGEABLE ELEMENT AND METHOD OF USE - Negative-working imageable elements can be imaged and processed to provide lithographic printing plates, especially with sulfuric acid-anodized aluminum substrates. These elements have an imageable outermost layer that contains two different polymeric binders, a primary polymeric binder is optionally present a discrete particles, and a secondary polymeric binder comprising a poly(vinyl acetate) that has a degree of hydrolysis of less than 60 mol %. These imageable elements can be designed for either off-press or on-press development. | 03-04-2010 |
20100215919 | ON-PRESS DEVELOPABLE IMAGEABLE ELEMENTS - Negative-working, on-press developable imageable element have improved shelf life and press run length because they include a free radically polymerizable composition comprising two or more ethylenically unsaturated compounds, each of which has two or more terminal acrylate groups, provided at least one of the ethylenically unsaturated compounds further comprises alkylene glycol units. In addition, the molar ratio of terminal acrylate groups to the alkylene glycol units in the non-polymeric free radically polymerizable composition is from about 1.25:1 to about 3:1. | 08-26-2010 |