E.i. Dupont De Nemours and Company

Dupont Electronics, Inc.

Adrian Lungu

Garret D Figuly

Steven Willis Shuey

Mukesh C Shah

Roxy Ni Fan

Robert M Blomquist

Mark A Hackler

Bradley K Taylor

Anandkumar R Kannurpatti

Violeta Lungu

Rajgopal Subramanian

Anankumar R Kannurpatti

Violetta Lungu

The invention pertains to a printing form and a process for preparing a polymeric printing form from a curable composition that includes a multifunctional urethane in a specified reactive group equivalent weight range, and an initiator. The process includes coating the curable composition onto a supporting substrate, such as a print cylinder, to form a layer, curing the layer with heat or by exposure to actinic radiation, and engraving the resulting cured layer to form at least one printing cell in the cured layer. The process prepares novel polymeric printing forms, particularly novel polymeric gravure printing forms, having a cured polymer-based composition layer that is engravable, resistant to solvent inks, and capable of printing gravure-quality images. The present invention shortens the time to prepare gravure printing cylinders and removes the need for and disposal of toxic heavy metals such as copper and chrome associated with conventional gravure print cylinder preparation.

Polymeric gravure printing form and process for preparing the same with curable composition having a multifunctional urethane

The present invention relates to a photosensitive printing form precursor and a method for forming a printing form from the precursor. The precursor includes a support and a layer of a photosensitive composition adjacent the support, in which at least one indicia is disposed between the support and the photosensitive layer. The indicia identifies the precursor, is retained throughout a multi-step process to convert the precursor into a printing form and in the end-use of the printing form.

Printing form precursor having indicia and a method for preparing a printing form from the precursor

The invention provides a photosensitive element and a method for preparing a printing form from the element. The photosensitive element includes a layer of a photosensitive composition containing a binder, a monomer, and a Norrish type II photoinitiator, wherein the photosensitive layer has a transmittance to actinic radiation of less than 20% and contains reinforcing particles of graphene and/or carbon nanotubes.

Photosensitive element having reinforcing particles and method for preparing a printing form from the element

The invention relates to an imaging element and a method of using the imaging element to form a recording element. The imaging element includes a composition sensitive to actinic radiation from a source of radiation having a range of wavelengths and a photoluminescent tag that is responsive to at least one wavelength from the source of radiation. The photoluminescent tag can be used to authenticate the identity of the element, provide information about the element, and/or to establish one or more conditions in a device used to prepare the recording element from the imaging element.

Process of using an imaging element having a photoluminescent tag

Imaging element having a photoluminescent tag and process of using the imaging element to form a recording element

This invention relates to a photosensitive element for use as a flexographic printing plate and a process for preparing the plate from the element. The photosensitive element has at least one photopolymerizable elastomeric layer that comprises a binder, a monomer, a photoinitiator, an onium salt, and a leuco dye. Upon exposure to actinic radiation, the onium salt and leuco dye react resulting in a change of color in polymerized portions of the photopolymerizable layer. The color change provides enhanced image color contrast in the photosensitive element.

Process for preparing a flexographic printing plate from a photopolymerizable element

The invention relates to a process for preparing a flexographic printing plate from a photosensitive element having a photopolymerizable layer and a thermally removable layer on the photopolymerizable layer. The process includes imagewise exposing the photosensitive element and thermally treating the exposed element to form a relief suitable for use in flexographic printing. The thermally removable layer can be transparent or opaque to actinic radiation. The invention also relates to a photosensitive element for use in this process. The photosensitive element includes a photopolymerizable layer and at least one thermally removable layer having a filler and a binder, wherein the binder is less than 49% by weight, based on the total weight of the binder and filler.

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Old Bridge, NJ, United States of America

Adrian Lungu