Patent application number | Description | Published |
20080280229 | NEGATIVE-WORKING IMAGEABLE ELEMENTS AND METHODS OF USE - A radiation-sensitive composition includes a radically polymerizable component, initiator composition, a radiation absorbing compound, and a polymeric binder having recurring units that are derived from various ethylenically unsaturated polymerizable monomers provided that at least 40 mol % of the recurring units have a tertiary carbon atom in the backbone and the rest of the recurring units have a secondary or quaternary carbon atom in the backbone. This composition can be used to provide negative-working imageable elements that can be imaged and developed to provide lithographic printing plates that have desired imaging speed and excellent run length without the need for a post-exposure backing step. | 11-13-2008 |
20090042135 | MULTI-LAYER IMAGEABLE ELEMENT WITH IMPROVED PROPERTIES - Positive-working imageable elements comprise a radiation absorbing compound and inner and outer layers on a substrate having a hydrophilic surface. The inner layer comprises a specific polymeric binder represented by Structure (I): | 02-12-2009 |
20090047599 | NEGATIVE-WORKING IMAGEABLE ELEMENTS AND METHODS OF USE - A negative-working imageable element has an imageable layer that includes an initiator composition including an iodonium cation and a boron-containing anion at a molar ratio of at least 1.2:1, an infrared radiation absorbing compound, a primary polymeric binder, and a spirolactone or spirolactam colorant precursor. The imaged element exhibits improved print-out. | 02-19-2009 |
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 |
20100316850 | NEGATIVE-WORKING IMAGEABLE ELEMENTS - Negative-working imageable elements have an imageable layer comprising a free radically polymerizable component, an initiator composition capable of generating radicals sufficient to initiate polymerization of the free radically polymerizable component upon exposure to imaging radiation, a radiation absorbing compound, one or more polymeric binders, and at least 5 weight % of core-shell particles comprising a hydrophobic polymeric core and a hydrophilic polymeric shell that is covalently bound to the polymeric core. The hydrophilic polymeric shell has one or more zwitterionic functional groups. These elements can be imaged such as by IR lasers to provide lithographic printing plates. | 12-16-2010 |
20120141942 | METHOD OF PREPARING LITHOGRAPHIC PRINTING PLATES - Lithographic printing plates are prepared by imaging and developing negative-working lithographic printing plate precursors that include certain particulate polymeric binders in the photosensitive imageable layer. Such particulate polymeric binders are poly(urethane-acrylic) hybrids. Development is carried out using a working strength developer that includes one or more organic solvents in a total amount of at least 7 weight % and an anionic surfactant in an amount of at least 5 weight %. | 06-07-2012 |