Name: Evonik Dynasylan PTA Propyltriacetoxysilane
Brand: Guangzhou Eric Wei Chemical Co., Ltd.

Features Of Evonik Dynasylan PTA Propyltriacetoxysilane

Highly reactive triacetoxysilane functionality enables rapid condensation with inorganic surfaces and moisture-cured crosslinking.
Propyl group provides excellent hydrophobicity and compatibility with organic polymers including silicones, polyurethanes, and acrylics.
Low volatility and favorable handling characteristics compared to chlorosilanes or alkoxysilanes with shorter alkoxy chains.
Effective adhesion promoter for glass, metals, and mineral fillers in sealants, adhesives, and coatings.
Hydrolyzes under ambient conditions to generate acetic acid—enabling visible cure indication and self-catalyzed reaction kinetics.

Typical Applications Of Evonik Dynasylan PTA Propyltriacetoxysilane

One-component moisture-curing silicone and hybrid polymer sealants for construction and automotive glazing.
Adhesion promoters in RTV (room-temperature vulcanizing) silicone formulations.
Surface modifier for silica, calcium carbonate, and talc in filled elastomers and thermoplastics.
Coupling agent in glass fiber sizing for enhanced resin–fiber interfacial bonding.
Key ingredient in high-performance stone, concrete, and masonry impregnation systems.

Chemical Type	Organofunctional triacetoxysilane
Product Form	Liquid
Appearance	Colorless to pale yellow clear liquid
Molecular Weight	260.3 g/mol
Density (20 °C)	1.07–1.09 g/cm³
Refractive Index (20 °C)	1.415–1.425
Solubility	Miscible with common organic solvents (e.g., alcohols, ketones, esters); hydrolyzes in water
Storage Stability	≥12 months in sealed containers at 5–25 °C

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