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

US9896605B2 · kind B2 · utility

Assignee

• tesa SE · DE

Inventors

• Stephan Zollner · Hamburg, DE
• Sven Hansen · Hamburg, DE
• Kay Brandes · Otter, DE
• Jorg Speer · Wrist, DE

Key dates

• Filing date: Sep 23, 2014
• Grant date: Feb 20, 2018
• Expiry date: Oct 16, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31935
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

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.