Coupsil® VP 6411

Coupsil® VP 6411 by Evonik acts as a reinforcing filler in rubber compounds. It imparts greater tensile strength, higher moduli, optimized dynamic properties, lower compression set values and better abrasion resistance. It appears as a white powder and reacts with unsaturated polymers during vulcanization under formation of covalent chemical bonds. It offers the advantage of a homogeneous modification with low moisture adsorption during storage and significantly lower development of ethanol during mixing and processing. It is a reaction product of organosilane Si 264® [3Thiocyanatopropyltriethoxysilane] with 100 parts and Ultrasil® VN 2 with 11 parts. Coupsil® VP 6411 is used for mechanical rubber goods.