UV-crosslinkable PSAs with UV absorber, methods for producing them and use

US9163168B2 · kind B2 · utility

Assignee

• tesa SE · DE

Inventors

• Alexander Prenzel · Hamburg, DE
• Stephan Zollner · Hamburg, DE
• Michael Siebert · Wedel, DE

Key dates

• Filing date: Dec 11, 2013
• Grant date: Oct 20, 2015
• Expiry date: Dec 11, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2312/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides meltable and UV-crosslinkable pressure-sensitive adhesives, such as acrylate hotmelts or hotmelt formulations, which can be processed by commonplace hotmelt processes and also on customary hotmelt coating lines, without any immediate alteration in the product properties in the event of (unwanted) deviation in the operational parameters. The compositions of the invention are UV-crosslinkable and meltable pressure-sensitive adhesives comprising (i) mixtures of UV-crosslinkable polyacrylate polymers selected from a) mixtures of UV-crosslinkable polymers with at least one photoinitiator bonded covalently to the backbone of the polymers, and b) mixtures of UV-crosslinkable polyacrylate polymers, monomers and at least one photoinitiator, and also (ii) at least one UV stabilizer, and also methods for producing them and the use thereof as bonding agents.