Basf Lacke+farben Ag

Basf Aktiengesellschaft

Basf Drucksysteme Gmbh

Xsys Print Solutions Deutschland, Gmbh

Thomas Zwez

Thomas Telser

Thomas Loerzer

Erich Beck

Bernhard Albert

Joachim Roser

Friedrich Seitz

Uwe Stebani

Guenther Schulz

Hartmut Sandig

Rolf Knöll

Stefan Wegener

Eleonore Bueschges

The present invention relates to a photosensitive flexographic printing element for the production of flexographic newspaper printing plates, comprising at least a flexible, metallic support, an adhesive layer applied thereto, a photopolymerizable layer which can be developed in organic media and which itself comprises at least one elastomeric binder, ethylenically unsaturated monomers, a photoinitiator or photoinitiator system and a plasticizer, a transparent substrate layer, and optionally a removable protective film, where the total thickness of the flexographic printing element is from 300 to 1000 &#x3bc;m, the elastomeric binder has a weight average molecular weight Mof from 80,000 to 150,000 g/mol and a Shore A hardness of from 50 to 80, and the amount of plasticizer is from 5 to 50% by weight, based on the amount of all constituents of the photopolymerizable layer, and to a process for the production of flexographic newspaper printing plates by imagewise exposure of the flexographic printing element to actinic light, followed by development and drying at from 105 to 160&#xb0; C.

Photosensitive, flexo printing element and method for the production of newspaper flexo printing plates

A photopolymerizable printing plate has a dimensionally stable support, a photopolymerizable layer, a top layer located thereon comprising two mutually incompatible, elastomeric block copolymers, and a protective sheet. Disclosed are processes for producing such a photopolymerizable printing plate, processes for producing relief printing plates, especially flexographic printing plates, and also relief printing plates having ink cells in the relief surface.

Photopolymerizable printing plates with top layer for producing relief printing plates

A photosensitive mixture useful for producing relief and printing plates consists essentially of

Photosensitive mixture for producing relief and printing plates

A photosensitive recording element comprises (A) a dimensionally stable substrate, (B) a photopolymerizable relief-forming recording layer and, if required, an adhesion-promoting layer arranged between (A) and (B), a release layer (C) applied to that side of the recording layer (B) which faces away from the substrate (A), and, if required, a cover sheet (D) applied thereon, the photopolymerizable relief-forming recording layer (B) containing b.sub.1) at least one polymeric binder, b.sub.2) at least one photopolymerizable olefinically unsaturated monomer which is compatible with b.sub.1), b.sub.3) at least one photopolymerization initiator and b.sub.4) at least one aryl alkyl ketone, and is suitable for the production of relief printing plates.

Photosensitive recording element and production of a relief printing

A reaction product useful for preparing radiation-sensitive materials, in particular materials whose solubility in water or aqueous alkali increases on irradiation, contains urea and urethane groups and also carboxyl groups and is obtained by reaction of

Reaction product, preparation thereof and radiation-sensitive material

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Karlsruhe, Germany

Thomas Zwez