Polyurethane PSA for sensitive surfaces

US7091300B2 · kind B2 · utility

Assignee

• tesa AG · DE

Inventors

• Bernd Lühmann · Norderstedt, DE
• Philippe Hesse · Kürten, DE
• Sianty Sunarto · Hamburg, DE
• Uwe Schümann · Pinneberg, DE
• Kirstin Weiland · Hamburg, DE
• Carsten Bohmer · Pinneberg, DE

Key dates

• Filing date: Apr 1, 2004
• Grant date: Aug 15, 2006
• Expiry date: Apr 1, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethane-based pressure-sensitive adhesive which attaches strongly to polar plastic surfaces, smooth metal surfaces and glass, but which has weak, if any, adhesion to paper, paperboard or skin and is easily detachable without damaging surfaces during its removal, and is reusable. The adhesive comprises a polyurethane formed by reacting an aliphatic or alicyclic polyisocyanate having a functionality of equal to or less than three with a combination of diol and triol.