ELASTOSIL® R plus 4001 is an addition-curing solid silicone rubber with two outstanding features: ease of processing and excellent elasticity. ELASTOSIL® R plus 4001 cures up to 50 percent faster than comparable peroxide-curing rubbers, allowing processors to achieve short cycle times and high production throughputs.
What’s more, cured ELASTOSIL® R plus 4001 products have good mechanical properties. Elastic and considerably deformable, they also retain their mechanical properties for many years. Post-cured molded parts are suitable for manufacturing membranes and seals for various industries and purposes, including sensitive applications in the food industry.
The high consistency silicone rubber ELASTOSIL® R plus 4001 already includes products of varying elasticity and hardness with grades ranging between 30 and 80 Shore A. WACKER has now developed further hardness grades. At this year’s DKT in Nuremberg, WACKER is unveiling products at both the upper and lower end of the Shore A scale, making these new grades suitable for very specific applications. With a Shore A hardness of 20, ELASTOSIL® R plus 4001/20 complements WACKER’s existing range of extremely soft and low-modulus silicone rubbers. This grade has an elongation at break of 1200 percent. In other words, products cured from ELASTOSIL® R plus 4001/20 can be stretched up to twelve times their original length without tearing and without losing their mechanical properties.
The second grade making its DKT debut is at exactly the opposite end of the hardness range. ELASTOSIL® R plus 4001/90 has a Shore A hardness of 90, which is very similar to that of a thermoset. Yet this solid silicone rubber has an elongation at break of 140 percent, making it comparatively elastic, flexible and ductile. The cured silicone is suitable for sensitive applications which means that ELASTOSIL® R plus 4001/90 can also be used in food application sectors.