AKTIFIT PF 115 is an activated SILFIT Z 91, produced by modifying the surface with a special amino functional silane. The by-products split off during the treatment reac-tion are largely removed during the production process which firmly at-taches the silane to the filler sur-face. This helps minimize undesira-ble side effects, as they are poten-tially encountered with in situ mix-ing (direct addition of silane to the compound).
Hoffmann Mineral is a manufacturer of Neuburg Siliceous Earth, a natural combination of corpuscular Neuburg Silica and lamellar kaolinite: a loose mixture impossible to separate by physical methods. As a result of natural aging, the silica portion exhibits a round grain shape and consists of aggregated primary particles of about 200 nm diameter. Such a unique structure is responsible for a relatively high specific surface area and oil absorption, which result, besides rheological activity, also in a whole range of application properties. Their manufacturing program includes the standard products Sillitin, Sillikolloid and puriss, the surface-treated Aktisil and the calcined products Silfit and Aktifit.
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