Name: Evonik Dynasylan IBTEO Isobutyltriethoxysilane
Brand: Guangzhou Eric Wei Chemical Co., Ltd.

Features Of Evonik Dynasylan IBTEO Isobutyltriethoxysilane

Highly hydrophobic isobutyl group enhances water repellency in mineral-based composites.
Three ethoxy groups provide excellent reactivity and crosslinking density with silanol surfaces.
Low volatility and favorable handling properties compared to shorter-chain alkoxysilanes.
Improved compatibility with organic polymers and resins due to the non-polar isobutyl moiety.
Enables durable covalent bonding between inorganic fillers (e.g., silica, glass) and organic matrices.

Typical Applications Of Evonik Dynasylan IBTEO Isobutyltriethoxysilane

Surface modification of silica, fumed silica, and precipitated silicas in silicone rubber compounds.
Adhesion promotion in glass-fiber reinforced plastics (GFRP) and pultrusion resins.
Hydrophobization agent for construction materials including cementitious mortars and grouts.
Functional additive in high-performance sealants and adhesives requiring long-term moisture resistance.
Pre-treatment for mineral fillers in thermoplastic composites (e.g., PP, PE) to improve dispersion and interfacial strength.

Chemical Type	Organofunctional alkoxysilane
Product Form	Liquid
Appearance	Colorless to pale yellow clear liquid
Molecular Weight	220.3 g/mol
Density (20 °C)	0.87–0.89 g/cm³
Refractive Index (20 °C)	1.395–1.405
Solubility	Miscible with common organic solvents (e.g., alcohols, acetone, toluene); hydrolyzes in water
Storage Stability	At least 12 months in sealed containers at room temperature under dry conditions

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