| Compound VS are masterbatches consisting of fumed silica and a vinyl-functional silicone polymer. They are used for producing formulations with good mechanical properties or for improving the mechanical properties of filled systems. Compound VS consists of about 30 % of surface-modified fumed silica (SiO2) and around 70 % of vinyl-functional silicone polymer. Application: The mechanical strength of a silicone formulation depends on its silica content, i. e. tensile strength, elongation at break and tear resistance increase. At the same time, viscosity also rises substantially. This behavior is shown by the below example of a two-component addition-curing silicone. Therein the silica content of the base polymer was increased from 0 to 30 % by a stepwise replacement of Polymer VS 1000 by Compound VS 100. Information provided by Evonik |
