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Munich-based chemicals company Wacker will unveil specialty silicone elastomers for the Indian automotive, transportation and infrastructure industry.
Products include Elastosil R plus 48xx and Elastosil LR 384x. These are oil-bleeding silicones that are used for manufacturing electrical mat seals and weather packs for automotive electronics. A further highlight will be flame-resistant silicone elastomers for use in rail vehicles and aircraft. Elastosil R 770 lends itself to the production of highly flame-resistant, self-extinguishing parts that do not emit toxic fumes when burned. Wacker will also present Genioplast Pellet S, a highly versatile, high-performance additive for compounding thermoplastic polymers.
Oil-bleeding silicone rubbers have a special property: they con-stantly exude small amounts of silicone oil. The oil droplets form a film on the surface of the elastomer that greatly improves the part's functionality and sealing action in several application areas.
High tear strength and elongation and is ideal for seals that must be especially cut resistant. Mat seals and cable bushing mats made from Elastosil R plus 48xx are so cut resistant that they are not damaged even when sharp-edged plugs are inserted.
Elastosil R plus 48xx is an addition-curing product and cures much faster than a peroxide-curing silicone. Consequently, production cycles can be shortened dramatically. Elastosil R plus 48xx can be injection molded. Thermal post-curing of the resultant elastomer imbues it with low, permanent compression set and therefore with good long-term sealing action.
Flame-Resistant and Self-Extinguishing:
A further highlight will be Elastosil R 770. This silicone rubber cures to a flame-resistant, self-extinguishing elasto-mer. When it burns, it generates little smoke and emits no toxic fumes. Elastosil R 770 can be extruded and molded to products that combine typical silicone rubber properties with exceptional fire safety characteristics. The cured elastomer is heat stable and remains permanently elastic even at low temperatures of down to – 40 °C, without the need for a plasticizer.
Manufacturing Additive for Thermoplastic Polymers
For makers of thermoplastic polymers, Wacker will be presenting Genioplast Pellet, a highly concentrated silicone additive in pellet form. Its active ingredient is a non-crosslinked, ultra-high-molecular, linear silicone polymer (silicone gum). The carrier material for the silicone is a pyrogenic silica which has been tailored for the silicone. Since this pyrogenic silica is com-patible with all thermoplastics, the additive can be used to compound every type of thermoplastic – unlike conventional silicone masterbatches.
More information: www.wacker.com