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

US7910163B2 · kind B2 · utility

Assignee

• tesa AG · DE

Inventors

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

Key dates

• Filing date: Sep 9, 2005
• Grant date: Mar 22, 2011
• Expiry date: Sep 15, 2025

Classification

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

Abstract

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.