Basf Aktiengesellschaft

Basf Drucksysteme Gmbh

Flint Group Germany Gmbh

Xsys Print Solutions Deutschland, Gmbh

Basf Lacke+farben Ag

Basf Lacke & Farben

Basf Drucksytems Gmbh

Thomas Telser

Horst Koch

Karl-Rudolf Kurtz

Uwe Stebani

Margit Hiller

Helmut Bach

Manfred Zuerger

Heinz-Ulrich Werther

Thomas Loerzer

Jens Schadebrodt

Hartmut Sandig

Wolfgang Huemmer

Thomas Zwez

Rolf Knöll

Uwe Krauss

Armin Becker

Alfred Leinenbach

Martin Meister

Matthias Beyer

Sabine Philipp

Wolfgang Wenzl

Christian Pietsch

Stefan Wegener

Hans Menn

Daniel Fleischer

Bernhard Albert

Dieter Littmann

Gerhard Bleckmann

Jürgen Kaczun

Gernot Dietz

Heinz Faulhaber

Fritz Nimtz

Claudia May

Eva Freudenthaler

J&uuml;rgen Kaczun

Manfred Z&uuml;rger

Klaus-Dieter Tensierowski

Beinhard Schneider

Caroline Hartmann

Moritz C Baier

Berthold Geisen

Markus T&ouml;nnessen

Albrecht Weidmann

Markus Feil

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

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

The invention relates to a process for the production of relief printing plates, where a carrier with a polymeric substrate layer is provided and a relief is formed layer-by-layer on a surface of the substrate layer, where the relief is formed by means of

Method for the additive production of relief printing plates

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

The invention relates to a method for producing pictorial relief structures on a layer construction. The method comprises the provision of a layer construction having a substrate layer. After this, at least one fluid containing at least one first reactive component is applied pictorially to the substrate, wherein the pictorial application takes place in the form of a plurality of droplets with a droplet volume of less than 2 &#x3bc;l, and wherein the droplets are positioned pictorially. After this, there is an at least partial diffusing of the at least one first reactive component into the substrate layer for a predefined exposure time and/or an at least partial diffusing of at least one second reactive component into the pictorially positioned droplets of fluid for a predefined exposure time, wherein the substrate layer comprises the at least one second reactive component. The created relief is then fixed under the influence of heat and/or radiation via a reaction involving the first reactive component and/or the second reactive component. Further aspects of the invention relate to a pictorial relief structure produced according to the method and to the use of the pictorial relief structure as a printing form, as a microfluidic component, as a microreactor, as a phoretic cell, as a light-controlling element for color representation, as photonic crystals or as flexible parts of items of clothing.

Method for producing pictorial relief structures

The invention relates to a method for generative production of relief printing plates, wherein a support with a polymeric substrate layer and a laser-ablatable mask layer is provided, the polymeric substrate layer containing a first binder. A mask with openings corresponding to pixels is produced by imagewise laser ablation of the mask layer. A liquid containing a reactive monomer is then applied over the surface of the mask-covered polymeric substrate layer, and the liquid or the reactive monomer diffuses through the openings of the mask into the polymeric substrate layer for a defined exposure time so as to form a relief. The excess liquid or the excess monomer and optionally the mask are removed from the surface, and the resulting relief is fixed by crosslinking.

Method for generative production of relief printing plates by monomer diffusion through an integral mask layer

A process for the manufacture of organically developable, photopolymerizable flexographic elements on flexible metallic supports by coating a flexible metallic support with a tack-free adhesive coating composition which is insoluble and non-swelling in printing inks and organic developers, attaching an elastomeric, photopolymerizable layer to a protective film, and laminating the photopolymerizable layer to the metallic support coated with said adhesive coating composition. A photopolymerizable flexographic element comprising a photopolymerizable layer which is attached to a metallic support by means of a tack-free adhesive film that is non-swelling and insoluble in printing inks and organic developers.

Manufacture of organically developable, photopolymerizable flexo-graphic elements on flexible metallic supports

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

Laser-engravable flexographic printing elements for the production of flexographic printing plates have relief layers comprising blends of hydrophilic polymers and hydrophobic elastomers. Said flexographic printing elements are used for the production of flexographic printing plates by means of laser engraving.

Laser-engravable flexo printing elements for the production of flexo printing forms containing blends of hydrophilic polymers and hydrophobic elastomers

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

In a laser-engravable flexographic printing element, the relief-forming layer comprises a conductivity carbon black having a specific surface area of at least 150 m/g and a DBP number of at least 150 ml/100 g. Flexographic printing plates are produced by a process in which a printing relief is engraved into said flexographic printing element by means of a laser system.

Laser-engravable flexographic printing element containing a conductive carbon black and method for production of flexographic printing forms

Method for producing organically developable, photopolymerizable flexographic printing elements on flexible metallic supports

The invention relates to a method for producing laser-engravable flexographic printing elements on flexible metallic supports comprising a cross-linked elastomeric layer and an absorber for laser radiation. The invention also relates to a method for producing flexographic printing plates by means of laser engraving using flexographic printing elements of the aforementioned type, and to flexographic printing plates produced using such a method.

Method for producing laser-engravable flexographic printing elements on flexible metallic supports

Laser-engravable flexographic printing elements including a thermally crosslinked, elastomeric, laser-engravable relief-forming layer E are made by producing a multilayer composite which has at least a two-layer composite formed of a depot layer D and an uncrosslinked precursor layer V for the relief-forming layer E which is directly adjacent to the depot layer D. Optionally, the multilayer composite may include further layers, such as support foils or films and/or protective films. The precursor layer V most preferably includes at least one elastomeric binder, and at least one ethylenically unsaturated monomer and, optionally an absorber for laser radiation and/or further additives. The depot layer D most preferably includes at least one elastomeric binder, and at least one thermally decomposing polymerization initiator and, optionally, an absorber for laser radiation and/or further additives. The thermally decomposing polymerization initiators are allowed to diffuse out of the depot layer D into the precursor layer V. If desired the depot layer D may be removed. Thermal crosslinking of the precursor layer V thereby yields the crosslinked elastomeric, laser-engravable, relief-forming layer E.

Method for the production of thermally cross-linked laser engravable flexographic elements

A process for the production of flexographic printing plates by laser engraving, in which the recording layer of a crosslinkable, laser-engravable flexographic printing element is crosslinked by the combination of a full-area crosslinking step with a crosslinking step which only acts at the surface, and a printing relief is engraved into the crosslinked recording layer by means of a laser, and flexographic printing plates obtainable by the process.

Method for laser engraving flexographic printing forms, and printing forms obtained thereby

Process for functionalizing a water-soluble or water-dispersible polymeric organic binder, in which unmodified, water-soluble or water-dispersible polymeric organic binders are reacted with one or more polar aprotic swelling agents which are compatible with the binder, with thorough mixing with one or more compounds which have groups capable of free radical polymerization, compositions obtainable thereby and radiation-sensitive mixtures which contain, as essential components, the above composition, at least one photopolymerization initiator, if required one or more ethylenically unsaturated, photopolymerizable low molecular weight compounds which are compatible with the polymeric binder and further conventional additives and/or assistants, and radiation-sensitive letterpress or relief printing plates which can be produced therefrom.

Preparation of crosslinkable water-soluble or water-dispersible compositions and radiation-sensitive mixtures obtainable therefrom

Growing community of inventors

Weinheim, Germany

Thomas Telser