EVONIK SILANES

Di-t-butoxydiacetoxysilane – Dynasylan BDAC is a clear, colorless to yellowish liquid, possessing reactive acetoxy groups. In the presence of water, the acetoxy groups of Dynasylan BDAC hydrolyze easily and form reactive silanol groups, which can bond to a variety of substrates. During hydrolysis acetic acid is released. Dynasylan BDAC is an effective adhesion promoter for room-temperature vulcanizing (RTV) silicone sealants.

Bis(triethoxysilyl)ethane – Dynasylan BTSE is the only commercially available bipodal alkylsilane. It is used in numerous applications where its nature as an excellent crosslinking agent is crucial. Its use usually requires acid- or alkali-catalysed hydrolysis. Since all six ethoxy groups are able to participate in this reaction, Dynasylan BTSE is regarded as hexafunctional. Hydrolysis leads to silanol groups which, in a subsequent condensation reaction, form very stable siloxane bonds (-Si-O-Si-). Condensation starts before hydrolysis is complete. During storage of these hydrolysates, condensation continues until a gel is formed. The rate of gelation depends on the concentration of water.

N,N,N-Tris(3-trimethoxysilylpropyl)triisocyanurate – VPS 7161 is an isocyanurate silane with a high concentration of trimethoxysilyl groups. Therefore it is a strong crosslinker. It can be used as an adhesion promoter on different types of substrates like metals and plastics. The molecule with the heterocyclic planar six membered ring system imparts good wetting and thermal resistance thus leading to good adhesion even at high temperatures on metal substrates. The oxidative stability and the low volatility of VPS 7161 makes it especially useful for hot melt adhesives e.g. EVA, PA, polyester, PU, and polyolefins.

Tris[3-(trimethoxysilyl)propyl]isocyanurate – VPS 7163 is a colorless isocyanurato silane with a high concentration of trimethoxysilyl groups. Therefore it is a strong crosslinker. It can be used as an adhesion promoter on different types of substrates like metals and plastics. The molecule with the heterocyclic planar six membered ring system imparts good wetting and thermal resistance thus leading to good adhesion even at high temperatures on metal substrates.