Wacker HDKâN20 is a hydrophilic fumed silica Wacker HDKâN20 is pure, X-ray amorphous silicon dioxide (Si02) and it is like all fumed silicas physiologically inert.
Wacker HDKâ needs high shear energy to be homogeneously distributed and to guarantee an optimum effectiveness. Mills such as ball mills and three roll mills yield the best results. In general the result obtained with a dissolver is sufficient. If no sufficiently effective stirring equipment is available we recommend to use highly concentrated masterbatches. Concentrations up to 10 weight % of Wacker HDKâ are possible. The masterbatches can be diluted using lower shear energies.