
- Principal:Silbond Corporation
- Functions:Adhesion Promoter, Binder, Binder & Resin, Coupling Agent, Crosslinking Agent, Hardener, Intermediate, Surface Modifier
- Chemical Family:Silicates
- End Uses:Chemical-Resistant Coatings, Primer, Slurries, Thermal Insulation, Thermal Insulation Materials
- Compatible Substrates & Surfaces:Ceramic, Glass, Metal
- Compatible Polymers & Resins:Silicones
- Applicable Processes:Investment Casting, Precision Casting, Sol-Gel Process
Dynasylan® SILBOND® 40 is a clear, low-viscosity liquid with a minimum silica content of 40.0% (the Si content of Dynasylan® SILBOND® 40 is calculated as SiO2). Dynasylan® SILBOND® 40 is an ethyl polysilicate that is the partially hydrolyzed product of tetraethyl orthosilicate (TEOS). The partial hydrolysis of TEOS (Si[OEt]4) results in the conversion of ethoxy groups to hydroxyl groups forming silanols. Subsequent condensation of silanols will form siloxane bonds (-Si-O-Si-O-) and eventually cause the material to gel. Dynasylan® SILBOND® 40 is often used as an intermediate, which is further hydrolyzed to produce a binder that can be used for many applications. Several of these end-uses include inorganic zinc-rich primers, investment casting molds, cores and ceramic shapes, coatings, and thermal insulation.