| Precipitated silica, surface-modified with organosilane DYNASYLAN® VTEO for application in the rubber industry. Description: Reaction product of organosilane DYNASYLAN® VTEO [Vinyltriethoxysilan] and ULTRASIL® VN 2 (specific surface area 130 m2/g). The product consists of 100 parts of ULTRASIL® VN 2 modified with 8 parts of DYNASYLAN® VTEO. Since the reaction between the organosilane and the silica is nearly completed, COUPSIL® VP 6508 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 6508 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. COUPSIL® VP 6508 is used in peroxide cured rubber compounds in combination with white fillers and where optimum technical properties are required. Application fields are: Mechanical rubber goods Information provided by Evonik |
