Dynasylan® 6498 is a vinyl silane concentrate (oligomeric siloxane) containing vinyl and ethoxy groups.
Scope of Application
Dynasylan® 6498 is excellent as an adhesion promoter, dispersion and hydrophobation agent in mineral filled compounds. In the presence of moisture, the ethoxy groups of Dynasylan® 6498 hydrolyse to produce ethanol and reactive silanol groups. These silanol groups react with the filler via silicon-oxygen bridges. The vinyl functional groups of Dynasylan® 6498 react with the polymer phase in the presence of radicals: A major field of application for mineral-filled compounds is the cable industry. EPDM and EVA can be processed into highly filled cable compounds through the adhesion promoting and hydrophobising effect of Dynasylan® 6498.
The EPDM and EVA polymers with Dynasylan® 6498 are for the halogen-free, non-toxic, environmentally-friendly flame retardant cable compounds (HFFR) based on ATH and MDH.
In addition, Dynasylan® 6498 can be used in many other applications such as filler and pigment coating, dispersions etc.
Typical property improvements obtained by using Dynasylan® 6498 in filled polymers are:
improved filler dispersion
significantly reduced water-uptake excellent balance between tensile strength and elongation at break at a high level
improved chemical resistance
strongly reduced tendency to stress cracking
higher impact strength
higher abrasion resistance