WACKER^® E 905

WACKER® E 905 dissolves readily in standard organic solvents. It is virtually insoluble in aqueous media, and reacts slowly releasing methanol and forming a resinous deposit. Due to its reactive terminal groups WACKER® E 905 forms a skin following air exposure after several days. However, its reactivity with water or atmospheric humidity must be taken into account during storage and processing, since the material will slowly start to condense.WACKER® E 905 can be formulated by conventional methods and mixing processes. The formulation composition depends on the required property profile. WACKER® E 905 can be formulated with a variety of fillers at high addition levels. The range starts with oxides, such as aluminum trihydroxide, quartz powders or pyrogenic silicas, and extends to coated and uncoated chalks. Water scavengers can be added to stabilize the formulations against premature curing as this is moisture-curing technology. Therefore exclusion of moisture during compounding and storage is necessary. GENIOSIL® XL 10 are particularly suitable scavengers.