Storage-stable, moisture-curing polyurethane adhesive with rapid adhesive formation on glass

Abstract

The object of the present invention relates to a moisture-curing adhesive composition comprising a) at least one polyurethane polymer having isocyanate groups, b) at least a silane adhesion promoter, c) at least one amine catalyst, and d) at least one chelate complexing agent. Compositions according to the invention are suitable especially as adhesive or sealant, in particular for glass panes, for example in vehicle construction or vehicle repair, wherein the use of a primer or activator can be dispensed with.

Description

technical field [0001] The present invention relates to polyurethane-based moisture-curing compositions suitable for bonding and sealing applications in the manufacturing industry and in automotive construction and automotive repair, in particular for bonding glass panels. Background technique [0002] Moisture-curing adhesives based on polyurethanes have long been used in industrial manufacture, for example for elastically bonding and sealing glass panes in the manufacture and repair of vehicles such as automobiles, vans, trains or ships. Especially for rapid bonding processes in which the adhesive connection has to be fast and force-locked, it is often necessary to pre-treat the substrates, for example with activators or primers, to support the Adhesion is established between the substrate and the adhesive. But pre-processing means additional time-consuming steps, causing expenses and increasing the complexity and error rate of the bonding process. In order to reduce cos...

AI Technical Summary

Problems solved by technology

When tackifiers or primers are not used, currently available one-part polyurethane adhesives are not yet capable of meeting all requirements for durability, processability and rapid adhesion establishment

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