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瓦克在ECS2015上推出胶粘剂用有机硅封端聚合物

来源：本站原创2015年05月04日

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Wacker at ECS’15: Unveiled Silane-terminated Polymers for Formulation of Adhesives

Munich -- At the European Coatings Show 2015, held in Nuremberg, Germany, Munich-based chemical group WACKER unveiled novel, silane-terminated polymers for the formulation of industrial adhesives and for sealing flat surfaces. Known as GENIOSIL XT, the new binder makes it possible to produce materials that are extremely tear-resistant and at the same time highly elastic. This combination of properties unlocks applications in automotive and mechanical engineering that were previously closed to silane-curing polymers. The new VINNAPAS EF 8860 dispersion is another highlight. Based on vinyl acetate-ethylene copolymers (VAE) the binder is ideal for flooring adhesives for bonding flexible floor coverings, such as carpets, PVC and linoleum.

Determination of adhesion via peel test: Adhesives formulated with VINNAPAS EF 8860 are particularly rugged and long-lasting. This makes the new product an ideal dispersion base for flooring adhesives for flexible floor coverings such, especially for PVC floorings.

GENIOSIL XT 50 and GENIOSIL XT 55 further complement WACKER’s portfolio of silane-curing binders. Both grades are based on a silane-modified polyether with a high density of crosslinkable silyl groups which cure to a tight-mesh network that is very strong but elastic. Adhesive layers and sealing membranes formulated with GENIOSIL XT possess high strength. However, they are also highly ductile and will tear only when subjected to strong forces. Damaged material exhibits no tendency to tear propagation.
GENIOSIL XT thus represents the first technically equivalent alternative to conventional polyurethane-based systems. By virtue of their properties, the new polymers are ideal for applications that repeatedly subject them to dynamic forces, such as vibrations in vehicles and washing machines. Up to now, applications of this kind were essentially the domain of isocyanate-curing polymer systems.