Dynasylan® SILBOND® 40-HF is a clear, low-viscosity liquid with a minimum silica content of 40.0% (the Si content of Dynasylan® SILBOND® 40-HF is calculated as SiO₂) and a flash point above 100° F (38° C), classifying it as a combustible liquid. This product is available to customers requiring a higher flashpoint than Dynasylan® SILBOND® 40.
Dynasylan® SILBOND® 40-HF 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-HF 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.
Typical Applications
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
- hardening component in dentistry for impression materials and as a binder for embedding material
Benefits at a glance
Product Details
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Further Information
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