10/19/2010

Wacker Chemie AG

WACKER Presents New Silicone Elastomers with Low Compression Set for the Automotive Industry

At the 18th International Trade Fair for Plastics and Rubber (K 2010), WACKER, the Munich-based chemicals company, will present two new silicone products for the automotive industry. They are the silicone elastomers ELASTOSIL® LR 3092/65 and ELASTOSIL® R plus 4060. Both product innovations have a very low compression set and high heat resistance and consequently make ideal sealing materials, for example in intercoolers. In addition, spark-plug boots made of ELASTOSIL® R plus 4060 afford optimum protection against moisture and water splashes even at high temperatures.

Exhaust-gas turbochargers could be considered the heart of modern diesel engines, because they substantially boost engine power and torque. A key element here is the intercooler, which is placed between the turbocharger and the engine. It lowers the high tempera¬tures resulting from compression of the intake air and ensures that a greater mass of air and thus of oxygen is routed to the cylinders.

For the intercooler to do this job properly over the engine’s lifetime, it requires a seal with minimal compression set. This is where the new ELASTOSIL® LR 3092/65 and ELASTOSIL® R plus 4060 silicone elastomers come in. ELASTOSIL® LR 3092/65 is a rapid-cure, two-component liquid silicone rubber that can withstand temperatures of up to 220 °C. By contrast, ELASTOSIL® R plus 4060 is a one-component solid silicone rubber that has the same basic properties, but can take even more heat. Both products have very low compression set and can be injection molded.

A further application is the membrane used for controlling the charge pressure in the turbocharger with the aid of an actuator. The latter prevents a pressure overload in the cylinder. The low compression set and high heat resistance of ELASTOSIL® LR 3092/65 and ELASTOSIL® R plus 4060 make them eminently suitable for such applications, too. ELASTOSIL® R plus 4060 is also ideal for the manufacture of spark-plug boots. The silicone rubber provides excellent protection against moisture, dirt and water splashes. The elastomer’s combination of high heat resistance and low compression set is another plus in this application, too.

Visit WACKER at K 2010 in Düsseldorf. You’ll find us in Hall 06, Booth A10.


Caption:
The silicone elastomers ELASTOSIL® LR 3092/65 and ELASTOSIL® R plus 4060 are among the new products to be presented by WACKER at K 2010. Both products have high heat resistance and an extremely low compression set. They are ideal for demanding automotive applications, for instance in intercooler gaskets. (Photo: Wacker Chemie AG)