Highly elastic polyurethane hot-melt adhesives

US7053152B2 · kind B2 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Michael Krebs · Hilden, DE
• Uwe Franken · Dormagen, DE
• Thomas Moeller · Goldkronach, DE
• Thomas Morgeneyer · Bopfingen, DE
• Hartmut Primke · Bopfingen, DE

Key dates

• Filing date: Dec 16, 2004
• Grant date: May 30, 2006
• Expiry date: Dec 16, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L31/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the production of a polyurethane hot-melt adhesive based on grafted polyester-polyether block copolymers with grafted-on hydroxyl groups and the reaction thereof with a stoichiometric excess of a polyisocyanate and the optional mixing thereof with further pre-polymers based on polyether polyols and polyester polyols is disclosed. By this process, the polyester-polyether block copolymers are firmly incorporated into the polyurethane matrix on curing, so that they are migration-proof. Highly-elastic hot-melt adhesives result, which, with optional foaming, are also suitable for the production of elastic seals.