Reactive polyurethane hotmelts with large PSA range

US7268183B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Matthias Wintermantel · Bensberg, DE
• Hermann Perrey · Krefeld, DE
• Christian Wamprecht · Neuss, DE
• Walter Meckel · Neuss, DE
• Jurgen Ramthun · Bensberg, DE

Key dates

• Filing date: Aug 15, 2003
• Grant date: Sep 11, 2007
• Expiry date: Apr 10, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Reactive polyurethane hotmelts comprising crystallizing polyesterpolyols based on fumaric acid and 1,6-hexanediol. These hotmelts exhibit good pressure-sensitive adhesive (PSA) properties over a very broad temperature range. The reactive polyurethane hotmelts are prepared by mixing a polyol mixture containing at least on crystallizing polyesterpolyol with an excess of polyisocyanates.