Ethyltriacetoxysilane

Ethyltriacetoxysilane (CAS 17689-77-9), also marketed as Dynasylan ETAC, is an acetoxy-functional silane used as a crosslinker and surface modifier in moisture-curing polymer systems.

Where is Ethyltriacetoxysilane used?

• Silicone sealants and elastomers: crosslinking agent
• One-part RTV systems for construction and automotive assembly: controls cure speed and final mechanical properties
• Adhesives: improves substrate adhesion, effective for glass, metals and plastics
• Coatings: surface coupling agent promoting bonding between inorganic substrates and organic binder systems
• Building and construction: structural glazing compounds and facade sealants requiring weathering resistance
• It releases acetic acid upon hydrolysis, enabling rapid cure at ambient conditions without a catalyst in many formulations.

Commercial specifications

• Packaging: drums to IBC containers