Degradable, Ultraviolet‐Crosslinked Pressure‐Sensitive Adhesives Made from Thioester‐Functional Acrylate Copolymers

Abstract: Pressure‐sensitive adhesives (PSAs) are made from soft, irreversibly lightly crosslinked polymers. Even after removal from surfaces, they retain insoluble networks which pose problems during the recycling of glass and cardboard. Herein, degradable PSAs are presented that provide the required performance in use but have networks that can be degraded after use. A series of copolymers was prepared through radical copolymerization of n‐butyl acrylate, 4‐acryloyloxy benzophenone (ABP) photo‐crosslinker, and dibenzo[c,e]oxepin‐5 (7H)‐thione (DOT) to provide degradable backbone thioesters. The optimum tack and peel strengths were found for molar contents of 0.05 mol% ABP and 0.25 mol% DOT. Degradation of the backbone thioesters through aminolysis or thiolysis led to the full dissolution of the networks, loss of adhesive properties of films (decreases in the measured tack and peel strengths), and the quick detachment of model labels from a substrate. Inclusion of DOT into PSAs offers a viable route toward degradable and recyclable packaging labels.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Degradable, Ultraviolet‐Crosslinked Pressure‐Sensitive Adhesives Made from Thioester‐Functional Acrylate Copolymers ; day:13 ; month:07 ; year:2023 ; extent:10 ; Angewandte Chemie / International edition. International edition ; (13.07.2023) (gesamt 10)

Contributors, Places and Time

• Creator: Abu Bakar, Rohani ; Hepburn, Kyle S. ; Keddie, Joseph L. ; Roth, Peter J.

Further information

• DOI: 10.1002/anie.202307009
• URN: urn:nbn:de:101:1-2023071415021948997321
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:55 AM CEST