Tesa Se

Tesa Ag

Kay Brandes

Sven Hansen

Jorg Speer

Stephan Zöllner

Klaus Massow

Esther Von Possel

Volker Lass

Marc Husemann

Alexander Prenzel

Matthias Heins

Stephan Zoellner

Matthias Heinz

Jörg Speer

Packaged viscoelastic polymer substances and methods for the production of the packaged viscoelastic polymer substances are provided. The packaged viscoelastic polymer substances are further processable under the influence of heat and shear.

Packaged viscoelastic polymer substance

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

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

The invention relates to double-sided adhesive tape comprising a viscoelastic, first polymer layer, a second polymer layer on the top face and a third polymer layer on the bottom face of the viscoelastic, first polymer layer, where the viscoelastic, first polymer layer is based on a polymer which is obtainable by polymerization of a monomer composition of

Adhesive assembly tapes

A method of producing an adhesive tape having at least one carrier layer and two outer adhesive layers, wherein the carrier layer is from 300 &#x3bc;m to 5000 &#x3bc;m thick and is composed of a photoinitiator-free homogeneously thermally crosslinked polymer based on acrylate and/or methacrylate, in which at least one trimerized isocyanate crosslinker is added in the melt to a polyacrylate copolymer having primary hydroxyl groups and based on acrylic esters and/or methacrylic ester, a layer of the polyacrylate together with the crosslinker is conveyed to a coating unit, where pressure-sensitive adhesive layers are laminated onto both sides of the not-yet fully-crosslinked polyacrylate layer, and the crosslinking of the polyacrylate leads to a homogeneously crosslinked carrier layer.

Method for producing adhesive strips for assembly, especially formed with three layers and based on thermally cross-linked, viscoelastic acrylate hot-melt adhesives

A process for producing an adhesive tape with single- or double-sided crosslinked pressure-sensitive acrylate hotmelt adhesive layer, wherein a crosslinker is added in the melt to a polyacrylate copolymer ('polyacrylate') based on acrylic and/or methacrylic esters, the polyacrylate with crosslinker is conveyed to a coating unit, where it is applied to a web-form layer and following application is homogeneously crosslinked, where the crosslinker is a thermal crosslinker and some of the acrylic and/or methacrylic esters contain primary hydroxyl groups and addition takes place preferably in an extruder.

Method for producing an adhesive strip comprising a thermally cross-linked acrylate hot-melt adhesive layer

A process for preparing a polyacrylate-based shaped article, a polyacrylate being polymerized by a conventional method, wherein the polyacrylate comprises copolymerized comonomers having thermally crosslinkable groups and comonomers having attached photoinitiators, and the polyacrylate is crosslinked thermally in a first step and by irradiation with UV light in a second step.

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Kaltenkirchen-Moorkaten, Germany

Kay Brandes