Dynasylan® 9896 is an oligomeric short-chain alkylfunctional silane.
Dynasylan® 9896 silane can be used as a surface modifier to generate hydrophobicity (e.g. on inorganic pigments, mineral fillers). The short-chain alkyl functionality results in unique compound properties when Dynasylan® 9896 treated minerals or pigments are incorporated into polymers, e.g. polyethylene or polypropylene. Loading levels of 0.5 to 1.5 weight-% Dynasylan® 9896 based on the weight of filler or pigment are typically recommended. Dynasylan® 9896 is excellent as a dispersion and hydrophobation agent in mineral filled compounds. Dynasylan® 9896 forms covalent bonds to the inorganic and will not deplead in the final compound as it will happen to silicone oils used as surface modifiers. So Dynasylan® 9896 enables the printablility of mineral filled plastics. In the presence of moisture, a low pH is created, the ethoxy groups of Dynasylan® 9896 hydrolyse to produce ethanol and reactive silanol groups. These silanol groups react with the filler via silicon-oxygen bridges. Dynasylan® 9896 can be used in many other applications such as filler and pigment coatings, dispersions etc. Typical property improvements obtained by using Dynasylan® 9896 in filled polymers are: improved filler dispersion good processability significantly reduced water-uptake