Dynasylan® SILBOND® 50

Scope of Application

Similar to Dynasylan® SILBOND® Condensed and Dynasylan® SILBOND® 40, Dynasylan® SILBOND® 50 is used to deposit silicic acid formed as a result of complete hydrolysis. The resulting silicic acid bonds well to many inorganic substrates, such as glass, ceramic, metal, fillers, pigments, and synthetic fibers.  The deposition of a thin SiO2 layer improves the chemical and thermal stability and mechanical properties.           Other applications are:     binder, especially  for inorganic zinc-rich coatings or precision investment castings      encapsulant for hydroxyl poor fillers to enhance adhesion with functional silanes      crosslinker component in cold-curing silicone rubber systems      coupling agent/adhesion promoter between organic polymers and inorganic substrates (fillers, pigments, glass, metals surfaces, etc.)   Dynasylan® SILBOND® 50 can also used as starting material for sol-gel processes. It is usually used in conjunction with alkylsilanes (e.g. Dynasylan® MTES) organofunctional silanes and/or organic precursors (e.g. organic resins) to form siloxane networks. This makes it possible to obtain highly scratch-, abrasion-, and chemical-resistant coatings.         Dynasylan® SILBOND® 50 is immiscible with water, therefore hydrolysis requires a cosolvent as a solubilizer. Mineral acids and ammonia are suitable as catalysts.           Dynasylan® SILBOND® 50 or its hydrolysates are also the binder component for 1- and 2-pack inorganic zinc-rich coatings, for corrosion protection on steel, and for slurries used in precision investment castings.