Elastosil N 9111
Making Seals Faster
A new, multi-purpose adhesive and sealant for use in the household appliances, automotive and electronics industries has been developed by Wacker AG, Munich, Germany. Sold under the name Elastosil N 9111, the product is a tin-free, one-component silicone rubber. This vulcanizes at room temperature in the presence of atmospheric moisture and is characterized by excellent heat stability and good mechanical properties. The new adhesive thus constitutes a tin-free alternative to conventional room-temperature-curing, one-component silicone rubbers. Such RTV-1 silicone grades are widely used for bonding, sealing and coating. They are now indispensable in many industrial sectors, such as construction, automotive, household appliances, electronics and textiles.
In launching Elastosil N 9111, the company has expanded its range of condensation-curing silicone rubbers with a product that opens up scope for economic processing. The new adhesive-sealant is especially interesting for applications in which organotin compounds cause problems and are unwanted. For example, electronic modules can be cast faster and more simply by the dam-and-fill method than was previously possible. In this method, the area to be cast is delimited with a bead of non-sag, low-viscosity silicone and then filled with a potting compound, for example a platinum-catalyzed silicone gel. Elastosil N 9111 thus offers significant time and processing advantages for makers of electronic parts for the automotive and other industries. Connectors for solar modules, too, can be installed quickly and so more cost effectively with Elastosil N 9111.
Elastosil N 9111 is a soft, pasty, non-sag compound, whose viscosity decreases upon application of shear force. Because of this shear-thinning property, the silicone rubber can easily be applied manually or automatically. The material is available in black and white and adheres to many common substrates such as aluminum, stainless steel, glass, polyamide and polyvinyl butyral. The vulcanizate is stable both at ambient temperatures and up to 200°C.
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