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Wacker A.G. released various products at the recent 2014 Expobor show.
• Elastosil LR 3094/60: a liquid silicone rubber that can be used to make molded gaskets for engine cooling circuits. This fast-curing liquid silicone rubber is designed for cost-effective, large-scale production of spark plug boots, Wacker said, and its rubber-elastic cured rubber grades feature heat resistance, good mechanical properties and dielectric properties. Spark plug boots and other technical products made of Elastosil LR 3094/60 do not require postcuring, Wacker said. Cured Elastosil LR 3094/60 rubber grades withstand temperatures of -55 to +210 degrees Celsius.
• Elastosil R 781/80: a solid silicone rubber filled with tiny magnetizable particles. The filler particles consist of magnetite, a ferrimagnetic material, Wacker said, and lends itself to the manufacture of magnetizable molded parts and profiles that, after magnetization, act like weak permanent magnets. As a solid silicone rubber, Elastosil R 781/80 can be processed by conventional molding processes and extrusion, the company said. The cured rubber is heat-resistant and will withstand temperatures ranging from -40 to +200 degrees Celsius. After postcuring, the rubber grades are suitable for applications involving contact with food and meet the requirements of the German Federal Institute for Risk Assessment (BfR) and the U.S. Food and Drug Administration, Wacker said.
• Elastosil LR 3022/60: a liquid silicone rubber that enables the manufacture of molded gaskets that can be used in automotive engine cooling systems. In its cured state, the new grade retains a low compression set, Wacker said, even under long-term load in direct contact with coolants. Standard silicone elastomers are not really suitable as sealants in the hot areas of engine cooling circuits. As soon as these elastomers come into contact with a coolant—usually a water/glycol mixture higher than 100 degrees Celsius—some of the key properties for leak-tightness, such as elasticity and rebound resilience, deteriorate, the company said. Elastosil LR 3022/60 retains its rebound resilience, which ensures high leak-tightness in the seal groove.
• Elastosil LR 3003/60 is an easily pigmented and fasting curing liquid silicone rubber that cures to form a transparent elastomer with a Shore A hardness of 60 and mechanical and dielectric properties, Wacker said. Thanks to enhanced production technology, the cured rubber's hardness is within the narrow range of ± 3 Shore A values. It can be processed by injection molding.
• Elastosil LR 3040/50 is a liquid silicone rubber that is food-compatible and facilitates cost-effective, large-scale production of tear-resistant silicone products, such as baby pacifiers and recreational items.
For more information, go to www.wacker.com.