Tesa Se

Jennifer Beschmann

Alexander Prenzel

Marten Papenbroock

Sarah Bamberg

Michael Siebert

Matthias Seibert

Inga Auktun

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

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

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

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;

Process for preparing polyacrylates, by the free-radical polymerization of monomer mixtures comprising at least 70% by weight of at least one acrylic and/or methacrylic ester in the presence of amino acids as regulator substances, and reaction solution comprising one or more solvents and one or more monomers, at least 50% by weight of the solvents being organic solvents, and at least 70% by weight of the monomers being acrylic and/or methacrylic esters, with at least one amino acid being present.

Process for preparing polyacrylates

The invention relates to a process for preparing a dispersion-based or hotmelt pressure-sensitive adhesive based on at least one polymer, which involves crosslinking the at least one polymer, the polymer having functional groups Y, the polymer additionally being admixed with at least one kind of functionalized particles which have at least one polymeric base unit, characterized in that the particles have a monomer as base unit, the monomer having at least one kind of functional groups Z which are not able to enter into any reaction with the functional group Y and which, by thermal energy, electromagnetic radiation, particulate radiation and/or sound energy, are converted into the group X, the crosslinking of the polymer being brought about at least in part by a reaction of the functional groups X of the particles and of the functional groups Y of the polymer, and additionally to pressure-sensitive adhesives based on at least one crosslinked polymer component, wherein the crosslinking of the polymer component is brought about at least partly through incorporation of functionalized particles, the particles having at least one polymeric base unit and also a monomer with one kind of functional groups Z, these groups Z, following conversion into the groups X by means of thermal energy, electromagnetic radiation, particulate radiation and/or sound energy, being capable of reacting with functional groups Y that are present in the polymer component, and also to the use of surface-modified functionalized particles having a polymeric base unit as crosslinking reagents for the crosslinking of polymers for preparing pressure-sensitive adhesives.

Pressure-sensitive adhesives and process for preparing them

A method for anticorrosive treatment of metal surfaces, especially at edges and transitions of the metal components, characterized in that a self-adhesive tape is applied to the metal surface and the self-adhesive tape contains at least one layer with a material which is heated such that the material melts onto the metal surface and thus forms an anticorrosive layer.

Growing community of inventors

Hamburg, Germany

Jennifer Beschmann