Vinyltriacetoxysilane

Vinyltriacetoxysilane (CAS 4130-08-9) is an acetoxy-functional silane coupling agent that improves adhesion and compatibility between inorganic substrates and organic polymer systems.

Where is Vinyltriacetoxysilane used?

• Sealants and adhesives: crosslinker and adhesion promoter for silicone formulations on glass, metal and concrete
• Coatings: improved substrate wetting and film adhesion on difficult surfaces in automotive and industrial protective finishes
• Polymer compounding: vinyl functionality grafts onto polyethylene and other polyolefins, improving filler dispersion and mechanical performance
• Electronics: encapsulants and potting compounds bond to housing materials and circuit substrates
• Upon hydrolysis it releases acetic acid, enabling reactive bonding at mineral surfaces while introducing a vinyl group for polymerization or crosslinking.

Good to know: Moisture-sensitive silane; storage requirements align to moisture-sensitive handling and safety protocols.

Commercial specifications

• Technical grade, purity commonly 97% or higher
• Drums and IBC containers
• Packaging options and concentration variants may vary by supplier