Precipitated silica, surface-modified with organosilane Si 264TM for application in the rubber industry. Description: Reaction product of organosilane Si 264TM [3-Thiocyanatopropyltriethoxysilan] and ULTRASIL® VN 2 (specific surface area 130 m2/g). The product consists of 100 parts of ULTRASIL® VN 2 modified with 11 parts of Si 264TM. Since the reaction between the organosilane and the silica is nearly completed, COUPSIL® VP 6411 offers the advantage of a homogeneous modification with low moisture adsorption during storage and significantly lower development of ethanol during mixing and processing. Applications and properties: COUPSIL® VP 6411 is used as a reinforcing filler in rubber compounds. It reacts with unsaturated polymers during vulcanization under formation of covalent chemical bonds. This imparts greater tensile strength, higher moduli, reduced compression set, increased abrasion resistance and optimized dynamic properties. It is used in many fields of the rubber industry in combination with white fillers and where optimum technical properties are required Information provided by Evonik |