Patent · US Expired

Hot melt polyurethane adhesive compositions based on polyester block copolymers

US6906148B2 · kind B2 · utility

4Cited by

4References

30Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Michael Krebs · Hilden, DE
Christoph Lohr · Wuppertal, DE
Andreas Brenger · Goldkronach, DE
Ingolf Scheffler · Wiesloch, DE

Key dates

Filing date	May 30, 2001
Grant date	Jun 14, 2005
Priority date	—
Expiry date	May 30, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2170/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to compositions comprising reaction products of a polyisocyanate with a polyester block copolymer and a process for the preparation thereof. These are suitable as a moisture-curing hot melt adhesive. The hot melt adhesive composition may optionally also comprise a reaction product of a polyisocyanate with a polyester polyol and/or a reaction product of a polyisocyanate with a polyether polyol. Such polyurethane hot melt adhesive compositions have good creep resistance and interfacial adhesion values on plastics and show very high strength values.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.