Neutral-coloured 1K polyurethane adhesive

US7199207B2 · kind B2 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Bernhard Gruenewaelder · Hilden, DE
• Werner Haller · Erkrath, DE
• Birgit Ness · Langenfeld, DE
• Thomas Empt · Viersen, DE

Key dates

• Filing date: Nov 12, 2004
• Grant date: Apr 3, 2007
• Expiry date: Nov 12, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/905
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polyurethane prepolymer obtainable by reacting at least one aromatic polyisocyanate having symmetrical substitution of NCO groups and at least one aromatic polyisocyanate having asymmetric substitution of NCO groups, the fraction of aromatic polyisocyanate having symmetrical substitution of NCO groups being higher than the fraction of polyisocyanate having asymmetric substitution of NCO groups, and at least one polyol having an OH functionality of more than 2.5 and at least one polyol having an OH functionality of less than 2.5.