摘要:
The invention relates to a one-component moisture curing compositions comprising at least one hydrophilic isocyanate-functional polyurethane polymer, at least one inorganic swelling agent selected from the group consisting of aluminum sulfate and magnesium sulfate, and at least one latent hardener. The invention is also related to a method for sealing and to a sealed article obtained by the use of the method.
摘要:
Die vorliegende Erfindung betrifft eine zweikomponentige Polyurethanzusammensetzung enthaltend mindestens 55 Gewichts-% Polybutadienpolyole bezogen auf die Gesamtmenge aller Polyole mit einem mittleren Molekulargewicht von mindestens 500 g/mol, und mindestens einen latenten Härter, wobei das Verhältnis der Anzahl Reaktivgruppen des latenten Härters zur Anzahl der vorhandenen OH-Gruppen im Bereich von 0.02 bis 0.4 liegt. Die Zusammensetzung verfügt über eine lange Offenzeit, eine blasenfreie Aushärtung, eine sehr tiefe Glasübergangstemperatur, eine hohe Elastizität und eine überraschend hohe Festigkeit, welche über einen weiten Temperaturbereich sehr konstant sind. Weiterhin haftet sie sehr gut auf metallischen und nichtmetallischen Substraten, wobei sie auf glasigen thermoplastischen Kunststoffen kaum Spannungsrisse verursacht. Sie ist somit hervorragend geeignet als struktureller elastischer Klebstoff für Verklebungen, welche in einem breiten Temperaturbereich beansprucht werden.
摘要:
The invention relates to a two-component composition containing a polymer polyol, a diol chain extender, an aldimine of formula (I), optionally additional polyols and diphenylmethandiisocyanates in the two components. The composition is particularly suitable as a manually applicable solvent-free liquid film for coating and/or sealing floors and roofs. It also has a long open time, cures quickly and without complications in a wide temperature and humidity range, has a high level of strength and is weather resistant.
摘要:
Two-component coating systems and compositions are disclosed. The coating compositions form crosslinked polyurea coatings and have relatively long pot life and relatively short dry time. The coating compositions include a polyisocyanate, a polyaspartic ester, and a polyetheraspartic ester.
摘要:
The present invention describes a one-part moisture-curing liquid applied waterproofing membrane comprising an MDI-based polyurethane polymer and two different aldimines as blocked amine hardeners in a specific ratio range. The membrane has a low odour, a long shelf life stability, a low viscosity at low solvent content, a sufficiently long open time to allow hand application and cures fast to a solid elastic material. The liquid-applied waterproofing membrane is particularly suitable for roofing applications, possessing high strength, high elongation and good durability under outdoor wheathering conditions in a broad temperature range.
摘要:
The invention relates to a two-component polyurethane composition containing a polyol, a polyisocyanate, a blocked amine, and a bismuth(III) - or zirconium(IV) catalyst. The composition is easy to process, cures quickly and without bubbles, and has unexpectedly high strengths when in its cured state. It is particularly suitable as an adhesive, sealant, coating or potting compound.
摘要:
The invention relates to the use of an aldimine of formula (I) as a cleaning agent or as a component of a cleaning agent composition for reactive polyurethane compositions, in particular for reactive polyurethane hot-melt adhesives. It has been determined that the amount of waste can be greatly reduced by using such cleaning agents, and that in particular mixtures of blocked and non-blocked reactive polyurethane compositions can be used without trouble as adhesives, without the adhesives suffering negative effects in the properties thereof, in the particular the heat resistance thereof.