Tesa Se

Alexander Prenzel

Jennifer Beschmann

Marten Papenbroock

Sarah Bamberg

Stephan Zöllner

Bernd Lühmann

Michael Siebert

Thilo Dollase

Klaus Keite-Telgenbüscher

Christian Schuh

Bernhard Müssig

Benjamin Pütz

Helmut Ritter

Marco Kupsky

Sven Hansen

Kay Brandes

Matthias Seibert

Thomas Schubert

Alexander Fischer

Norbert Grittner

Esther Von Possel

Markus Brodbeck

Matthias Heinz

Inga Auktun

Julia Befuss

Niko Lübbert

Matthias Heins

Marta Lunding

Julia Befuß

Ji Li

Anika Bolus

Julia BEFUß

Sarah Aleed

Benjamin PÜTZ

The invention relates to a polymer obtainable by the radical polymerization of at least one monomer, namely one or more (meth)acrylate monomers and optionally, in addition, vinylic comonomers, wherein the polymer has a molar mass Mof at least 5,000 g/mol and at most 200,000 g/mol and at least one of the monomers is functionalized with at least one epoxy group, wherein the proportion of the epoxide-functionalized monomer(s) (a) is more than 30 wt %.

Functionalized (co)polymers for adhesive systems

The intention is to provide an adhesive system which is stable in storage and which when used permits precise positioning of the adhesive, and which can be crosslinked without exceeding moderate temperatures. The said system is moreover intended to provide strong adhesive bonds that attain high performance levels. This is achieved via a kit containing at least two pressure-sensitive adhesive layers A and B, where the two pressure-sensitive adhesive layers A and B mutually independently respectively comprise at least one polymer containing a multiplicity of carboxy groups; in the pressure-sensitive adhesive layer A a portion of the carboxy groups of the polymer containing these has been activated by reaction with an activator AA; and&#x2014;the pressure-sensitive adhesive layer A&#x2014;at least one crosslinking agent Vwhich can enter into a crosslinking reaction with the carboxy groups of the polymer containing these of the pressure-sensitive adhesive layers A and B, but which in the pressure-sensitive adhesive layer A is not significantly reactive; &#x2014;the pressure-sensitive adhesive layer B&#x2014;at least one crosslinking agent Vwhich can accelerate the crosslinking reaction of the carboxy groups of the polymer containing these of the pressure-sensitive adhesive layer B with the crosslinking agent Vand which can permit and accelerate the crosslinking reaction of the carboxy groups of the polymer containing these of the pressure-sensitive adhesive layer A with the crosslinking agent Vand can enter into a crosslinking reaction with the activated carboxy groups of the polymer containing these of the pressure-sensitive adhesive layer A. The invention moreover also relates to an adhesive tape which is obtainable via contact between the pressure-sensitive adhesive layers of the kit, and to a process for producing said adhesive tape.

Adhesive system made of a multiplicity of pressure-sensitive adhesive layers

The present invention relates to a cationically polymerizable composition comprising or consisting of:  The invention further relates to a pressure sensitive adhesive and also to a structural pressure sensitive adhesive, which are obtainable by polymerization and optional subsequent additional crosslinking of such a composition, and also to the use of these pressure sensitive adhesives.

Cationically polymerisable polyacrylate containing alkoxysilane groups and use thereof

Crosslinker-accelerator system for the thermal crosslinking of polyacrylates having functional groups capable of entering into linking reactions with epoxide groups, comprising at least one substance having at least one epoxide group as crosslinker and at least one substance of the formulaRN&#x2014;CRR&#x2014;CRR&#x2014;(CRR)&#x2014;Xin which the Rindependently represent hydrogen, a substituted or unsubstituted alkyl or cycloalkyl radical or together with the nitrogen atom form a 5-7-membered ring;R, R, R, R, Rand Rindependently represent hydrogen or an alkyl radical having 1 to 8 carbon atoms or form a 5-7-membered cycloalkylene group;n=0; andX represents &#x2014;OH, &#x2014;OR, &#x2014;SH, &#x2014;SR and &#x2014;PR, in which R independently represents C-Calkyl radical, C-Calkenyl radical or C-Calkynyl radical, an aryl group or an aliphatic or aromatic heterocycle, as accelerator.

Crosslinker-accelerator system for polyacrylates

The invention relates to a UV-cross-linked, polyacrylate-based adhesive mass that has high adhesive force and high cohesion and that can be produced by means of a hot-melt process with subsequent cross-linking. This is achieved by providing an adhesive mass that can be obtained by cross-linking a composition, which comprises at least one poly(meth)acrylate having a weight-average molar mass Mof at least 100,000 g/mol and at least one polyfunctional &#x3b1;-cleaver and is characterized in that the composition contains at least one adhesive-force-increasing resin having a weight average molar mass Mof at most 30,000 g/mol, which resin can be obtained by polymerizing a monomer composition M1, comprising at least one compound according to formula (I) HC&#x2550;C(R)(COOR), wherein Rrepresents a hydrogen atom or a methyl group and Rrepresents a hydrogen atom or a functionalized or non-functionalized C-Calkyl group.

Adhesive-resin-modified adhesive mass

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

Multi-phase polymer composition comprising a comb polymer (A) which forms a continuous acrylate phase and a discontinuous hydrocarbon phase, and at least one hydrocarbon compound (B) which is soluble in the hydrocarbon phase of the comb polymer (A), an adhesive mass comprising the multi-phase polymer composition.

Multi-phase polymer composition

In the context of a polyacrylate-based composition, the intention is to allow controlled thermal crosslinking. This is accomplished by provision of a crosslinker-accelerator system for the thermal crosslinking of polyacrylates having functional groups suitable for entering into linking reactions with epoxide groups, comprising

Multilayer product comprising at least one layer of an acrylate-based foam carrier (S); and a multiphase polymer composition (P) applied to this layer; the multiphase polymer composition (P) comprising:

Multi-layer product

Adhesives and pressure-sensitive adhesives comprising polymerization products of acrylates, the adhesives being meltable and comprising polymerization products of esters of (meth)acrylic acid and (meth)acrylic acid, the polymerization product having a molecular weight Mn of greater than 50 000 g/mol and Mw of greater than 500 000 g/mol.

Adhesives, UV-crosslinkable PSAs and bonding agents with UV-crosslinked PSAs

Monomer composition comprising (i) acrylic monomers selected from the group consisting of (meth)acrylic acid and (meth)acrylic esters; (ii) orthoalkyl phenyl ketone- and/or orthoalkyl phenyl aldehyde-functionalized (meth)acrylate monomers; and (iii) optionally, further olefinically unsaturated monomers having functional groups; process for preparing a first polymer composition comprising the free-radical polymerization of the monomer composition, and polymer composition obtainable by this process; composition comprising the polymer composition and a dienophile which can react with hydroxy-ortho-quinodimethane functional groups in a Diels-Alder or hetero-Diels-Alder reaction and conversion of this composition to a crosslinked polymer composition.

UV-crosslinkable polymer composition

Controlled thermal crosslinking in a polyacrylate-based composition is accomplished by a crosslinker-accelerator system for the thermal crosslinking of polyacrylates having functional groups suitable for entering into linking reactions with epoxide groups, comprising at least

Crosslinker-accelerator system for the thermal crosslinking of polyacrylates having functional groups capable of entering into linking reactions with epoxide groups, comprising at least one substance having at least one epoxide group as crosslinker and at least one substance of the formulaRN&#x2014;CRR&#x2014;CRR&#x2014;(CRR)&#x2014;Xin which the Rindependently represent hydrogen, a substituted or unsubstituted alkyl or cycloalkyl radical or together with the nitrogen atom form a 5-7-membered ring;

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 method for producing polyacrylate adhesive compounds with a narrow molar mass distribution by means of a radical polymerization and a subsequent increase of the molar masses by reacting with bis- or multi-dienyl compounds, in particular with &#x3b1;,&#x3c9;-bis-dienyl compounds, in order to increase the cohesion in particular.

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Hamburg, Germany

Alexander Prenzel