Tesa Ag

Tesa Se

Stephan Zöllner

Marc Husemann

Sven Hansen

Kay Brandes

Bernd Lühmann

Alexander Prenzel

Kai Ellringmann

Klaus Massow

Nils Utesch

Jorg Speer

Klaus Keite-Telgenbüscher

Stefan Wulf

Michael Siebert

Reinhard Storbeck

Benjamin Pütz

Andreas Westphal

Helmut Ritter

Jessica Erwin

Thilo Dollase

Thorsten Krawinkel

CHristoph Nagel

Marco Kupsky

Jan Ellinger

Christian Harder

Anika Petersen

Frank Henke

Kristin Kerber

Renke Bargmann

Norbert Grittner

Christian Ring

Esther Von Possel

Alexander Herrmann

Philipp Preuβ

German Patino

Andreas Schröder

Elisabetta Ardente

Sven Konig

Ulf Cartellieri

Olaf Gōrbig

Franziska Eberhardt

Heiko Thiede

Andreas Roosen

Kai Tom Wörden

Nico Diamantis

Torsten Runge

End-group-functionalized oligomers with controlled degrees of functionality based on styrene are produced by reacting the monomer with a regulator by means of free-radical polymerization. At least some of the quantity of regulator is added according to a prescribed program so that at every juncture t the value of the quantitative fraction added up to said juncture does not fall short of the value of the respective conversion U(t) in the polymerization reaction at said juncture t by more than 5 percentage points and does not exceed said value U(t) by more than 5 percentage points.

Process for producing short-chain end-group-functionalized macromolecules based on styrene

Composite made of two substrates for use for optical, electronic and/or precision-engineered equipment, comprising a first substrate and a second substrate and, arranged so as to connect the first substrate to the second substrate, an adhesive layer, wherein the adhesive layer comprises an adhesive which has, relative to the mixture, (a) from 60% by weight to 90% by weight of a first polymer component based on polyacrylate and (b) from 10% by weight to 40% by weight of a second polymer component based on elastomers, where the second polymer component is essentially not miscible with the first polymer component, so that the adhesive is present in at least two separate phases in the adhesive layer.

Pressure-sensitive adhesive tapes for the adhesive bonding of windows more particularly in mobile equipment

The invention describes a double-sided, carrierless self-adhesive tape which can be used in particular for achieving very durable adhesive bonding of a variety of articles. This double-sided, carrierless self-adhesive tape is composed of a homogeneously crosslinked pressure-sensitive acrylate hotmelt composition of single-layer construction, which may have been lined with release materials such as siliconized release papers or release films. The double-sided, carrierless pressure-sensitive adhesive tape is characterized in that it is composed of a photoinitiator-free, thermally homogeneously crosslinked acrylate hotmelt which is crosslinked predominantly by way of urethane units. It is notable in particular for the fact that it is homogeneously chemically crosslinked through the layer and, in contrast to acrylate layers crosslinked by radiation (UV/EBC), does not exhibit any profile of crosslinking through the layer. It can be used in particular as an adhesive transfer tape for the permanent attachment of articles to a variety of substrates.

Method of producing a self-adhesive tape having a layer of photoinitiator-free pressure-sensitive acrylate hotmelt adhesive

Crosslinked pressure-sensitive adhesives (PSAs) based on polymers of branched macromolecules each comprising a main chain and one or more sidechains pendent to the main chain, the constitutional units thereof originating from a) X wt % of one or more acrylic and/or methacrylic esters, with 80&#x3c;=X&#x3c;=99.5; b) Y wt % of radically copolymerizable monomers having at least one acid function, with 0.5&#x3c;=Y&#x3c;=15; c) Z wt % of vinyl compounds, with 0&#x3c;=Z&#x3c;=5, at least one sidechain pendent to the main chain having a number-average molar mass &#x3e;=1000 g/mol, and the respective amounts of constitutional units originating from a), b) and c) can be the same in each case or differ by not more than 1%, and where a), b) and c) may in each case be the same or different monomers, have detachment properties which can be set independently of one another.

Shear-resistant pressure-sensitive adhesive with high tack

The invention relates to a process for preparing homogeneously crosslinked polymers, in which at least one crosslinker is added to a polymer in the melt, in which the polymer is further processed from the melt, and in which a thermal crosslinking reaction is brought about by means of the crosslinker, with at least part of the crosslinking reaction taking place after the further processing at a temperature below the melting temperature of the polymer, characterized in that the crosslinker comprises an at least difunctional compound, at least one of the functional groups being an oxazoline group, and the polymer contains functional groups which, at a temperature below the melting temperature of the polymer, are able to react with the oxazolines in a linking reaction in the sense of the thermal crosslinking reaction.

Thermally crosslinking polyacrylates and process for their preparation

Laser-inscribable film, comprising a contrast layer based on a cured acrylate coating composition and, arranged above the contrast layer, an engraving layer, where the cured acrylate coating composition is based on a composition comprising from 30 to 80% by weight of a trifunctional oligomer A, from 0 to 20% by weight of a trifunctional monomer B, from 1 to 30% by weight of a difunctional monomer C, and from 2 to 40% by weight of a colorant pigment.

Heat-resistant laser-inscribable film

The invention provides meltable and UV-crosslinkable pressure-sensitive adhesives, such as acrylate hotmelts or hotmelt formulations, which can be processed by commonplace hotmelt processes and also on customary hotmelt coating lines, without any immediate alteration in the product properties in the event of (unwanted) deviation in the operational parameters. The compositions of the invention are UV-crosslinkable and meltable pressure-sensitive adhesives comprising (i) mixtures of UV-crosslinkable polyacrylate polymers selected from a) mixtures of UV-crosslinkable polymers with at least one photoinitiator bonded covalently to the backbone of the polymers, and b) mixtures of UV-crosslinkable polyacrylate polymers, monomers and at least one photoinitiator, and also (ii) at least one UV stabilizer, and also methods for producing them and the use thereof as bonding agents.

UV-crosslinkable PSAs with UV absorber, methods for producing them and use

The invention relates to a pressure-sensitive adhesive. It is envisaged that the pressure-sensitive adhesive comprises a first layer and a second layer, the first layer being a heat-activatable pressure-sensitive adhesive which has a static glass transition temperature Tor a melting point Tof at least +30&#xb0; C.; and the second layer being a polyacrylate pressure-sensitive adhesive which has a static glass transition temperature of not more than +15&#xb0; C.

Adhesive material

Crosslinker/accelerator system for thermally crosslinking polyacrylates with functional groups that are adapted to react with epoxy groups in a crosslinking reaction, comprising at least one epoxy group-containing substance and at least one substance that accelerates the crosslinking reaction at a temperature below the melting temperature of the polyacrylate.

Thermally crosslinking polyacrylates and method for producing the same

A UV-crosslinkable polyacrylate pressure-sensitive adhesive composition having a polyacrylate having photoinitiator units incorporated therein by polymerization and being produced by a free-radical solvent-free polymerization process.

Method for producing solvent-free UV-crosslinkable acrylate pressure-sensitive adhesives

Pressure-sensitive adhesive tape made of a flat, support material each side of which is coated with a pressure-sensitive adhesive, the pressure-sensitive adhesive on at least one side being produced from a monomer mixture comprising a monomer of the formula CH&#x2550;CH(R)(COOR), where R&#x2550;H or CHand Ris an alkyl radical having 1 to 10 carbon atoms or H and the homopolymer possesses a static glass transition temperature of &#x3c;&#x2212;30&#xb0; C.

Method for mounting printing plates to printing cylinders or sleeves with adhesive tape

Adhesive tape suitable for flying splice of flat web material having non-polar surfaces which has been wound to form rolls, the adhesive tape comprising an upper self-adhesive composition (), a splittable carrier () and a lower self-adhesive composition () on the bottom face of the splittable carrier (), wherein as upper self-adhesive composition () a silicone-free self-adhesive composition is used which has a bond strength to a polyethylene substrate of 1.5 N/cm or more (measurement method tesa test A) and an initial tack corresponding to a rolling distance of 200 mm or less (measurement method tesa test D), and as lower self-adhesive composition () a self-adhesive composition is used which has a bond strength to a polyethylene substrate of 1.5 N/cm or more (measurement method tesa test A) and a complex viscosity of 10,000 Pa&#xb7;s or more at 1 rad/s and 40&#xb0; C. (measurement method tesa test F).

Adhesive tape and its use

Transparent acrylate pressure-sensitive adhesive comprising a filler, the acrylate-pressure sensitive adhesive comprising a polyacrylate and particles of silicate and/or of silica gel. The particles of silicate and/or of silica gel have a size of not more than 50 nm. The acrylate pressure-sensitive adhesive is prepared by a process in which acrylates and comonomers are polymerized in the presence of at least one organic solvent or in bulk, the particles of silicate and/or of silica gel being mixed in before or after the polymerization.

Transparent acrylate adhesive mass comprising a filler

The invention relates to pressure-sensitive adhesive tapes for flying splice of flat web materials, having at least one splittable carrier and two layers of adhesive, at least one of the adhesives being a silicone PSA, more particularly an electron-beam-crosslinked silicone PSA, and also to a method of producing them. The silicone PSA advantageously has at least one polydiorganosiloxane having the structure &#x2014;Si(R)&#x2014;O&#x2014;[Si(R)&#x2014;O]&#x2014;Si(R)&#x2014;, where the 2n+4 substituents R independently of one another are monovalent hydrocarbon radicals and n is an integer, and also at least one resin ('MQ resin') constructed from (R)SiO&#x2014; units ('M units') and SiOunits (&#x201c;Q units&#x201d;), the substituents Rof the M units being independently of one another alkyl groups, alkenyl groups, alkylsilyl groups, hydroxyl groups or hydrogen.

PSA tapes for splicing flat web materials

The invention relates to a bilayer pressure-sensitive adhesive. Provision is made for the bilayer pressure-sensitive adhesive to comprise an apolar layer and a polar layer,

Bilayer pressure-sensitive adhesives

Growing community of inventors

Hamburg, Germany

Stephan Zöllner