Flint Group Germany Gmbh

Kuraray Europe Gmbh

Xsys Germany Gmbh

Uwe Krauss

Thomas Telser

Uwe Stebani

Armin Becker

Christian Pietsch

Jens Schadebrodt

Udo Metzmann

Berthold Geisen

Inge Raschke-Metzmann, Legal Representative

Caroline Hartmann

Moritz C Baier

The invention relates to a radiation-curable mixture for generating relief structures, comprising

Radiatioin-curable mixture containing low-functionalised, partially saponified polyvinyl acetate

A method for the production of functionalized partially hydrolyzed polyvinyl acetate comprising vinyl alcohol, vinylacetate and functionalized vinyl alcohol units by reacting in a melt a partially hydrolyzed polyvinyl acetate as component A with a reactive compound carrying at least one ethylenically unsaturated group and at least one reactive group reactive with hydroxyl or acetate groups as component B, in the presence of at least one stabilizer as component C and in the presence of at least one catalyst selected from the group consisting of tertiary amines and nitrogen-containing heterocycles as component D, the method comprising the steps: feeding the components into a mixing device capable of heating, melting and mixing components A, B, C and D, heating, melting and mixing components A, B, C and D in the device to give a melt and reacting components A and B in the melt.

Method for the production of functionalized partially hydrolyzed polyvinyl acetate

Photopolymerisable layered composite for producing flexo printing elements

The invention relates to photopolymerizable flexographic printing elements which contain ethylenically unsaturated, alicyclic monomers and hard flexographic printing plates, in particular cylindrical continuous seamless flexographic printing plates, which can be produced therefrom.

Photopolymerizable flexographic printing elements and hard flexographic printing formes which are produced therefrom

Processes comprising providing a layer composite comprising a layer of photopolymerizable material and a removable substrate film disposed on one side of the layer of photopolymerizable material, wherein the photopolymerizable material comprises an elastomeric binder, an ethylenically unsaturated monomer and a photoinitiator; and (a) miter-cutting two edges of the layer composite to be joined, to form two miter-cut ends; (b) providing a hollow cylinder on a rotatably mounted support cylinder, wherein the hollow cylinder has an outer surface and is in a temporarily locked position relative to the support cylinder; (c) applying an adhesion-promoting layer to the outer surface of the hollow cylinder; (d) applying the layer composite to the hollow cylinder bearing the adhesive-promoting layer, wherein the layer composite is disposed on the hollow cylinder such that the removable substrate film faces away from the hollow cylinder and the two miter-cut ends lie substantially one on top of the other, but not overlapping; (e) removing the substrate film from the layer of photopolymerizable material to provide an exposed surface of the layer of photopolymerizable material; (f) contacting the exposed surface of the layer of photopolymerizable material with a rotating calender roll with heating to join the two miter-cut edges and form a processed hollow cylinder, wherein heating comprises a locally-acting heat source moved in an axial direction relative to the hollow cylinder along the entire width of the layer of photopolymerizable material such that the exposed surface is heated; and (g) removing the processed hollow cylinder from the support cylinder.

Processes and apparatus for producing photopolymerizable, cylindrical, continuous, seamless flexographic printing elements

Growing community of inventors

Gossersweiler-Stein, Germany

Uwe Krauss