Dynasylan 6490 Vinyl siloxane 131298-48-1 Degussa-Sivento Adhesion Promoters >> Organofunctional silane Crosslinking / Coupling / Curing Agents >> Silane SEALANT ADHESIVE A oligomeric siloxane containing both vinyl and methoxy groups. DYNASYLAN 6490 is a vinyl silane concentrate. Is a colorless, nearly odorless liquid. is suitable as an adhesion promoter between inorganic materials (e.g. minerals, glass, metal) and organic polymers. In the presence of free-radical donors, such as peroxides, DYNASYLAN 6490 also acts as a crosslinking agent. The high boiling start of DYNASYLAN 6490, together with its high flash point, gives it several advantages with respect to safety and handling. From an environmental viewpoint it should be noted that the amount of released hydrolysis alcohol (VOC) is considerably less than for monomeric silanes. Typical property improvements obtained by using DYNASYLAN 6490 in filled polymers are: improved filler dispersion increased heat resistance improvement of creep behavior at increased temperature improved chemical resistance strongly reduced tendency to stress cracking higher impact strength higher abrasion resistance good processability Colorless and odorless vinyl silane concentrate. Acts as adhesion promoter and crosslinking agent. Improves filler dispersion, creep behavior at increased temperature and chemical resistance. Increases heat and abrasion resistance. Offers high impact strength.