Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Evonik Dynasylan SILFIN 75 Vinylsilane

Evonik Dynasylan SILFIN 75 Vinylsilane is a high-purity vinyl-functional silane coupling agent designed for enhancing adhesion between organic polymers and inorganic substrates like glass, silica, or minerals. It improves mechanical strength, moisture resistance, and dispersion stability in composites, sealants, and rubber formulations—especially in tire tread compounds and silicone-modified resins.
  • evonik dynasylan silfin 75 vinylsilane_67d93bb8
  • evonik dynasylan silfin 75 vinylsilane_67d93bb8

Features Of Evonik Dynasylan SILFIN 75 Vinylsilane

  1. High-purity vinyltrimethoxysilane (VTMS) with ≥97.0% assay for consistent coupling performance.

  2. Low volatility and excellent hydrolytic stability in anhydrous storage conditions.

  3. Enables strong covalent bonding between inorganic fillers (e.g., silica, glass) and organic polymer matrices.

  4. Facilitates improved dispersion of fillers and reduced viscosity in unsaturated polyester and vinyl ester resins.

  5. Compatible with free-radical curing systems, supporting efficient crosslinking during composite processing.

Typical Applications Of Evonik Dynasylan SILFIN 75 Vinylsilane

  1. Fiber-reinforced polymer (FRP) composites for wind turbine blades and automotive structural parts.

  2. Surface treatment of mineral fillers in high-performance rubber compounds (e.g., tire treads).

  3. Adhesion promotion in glass-fiber sizing formulations for thermoset and thermoplastic composites.

  4. Functional additive in silicone-modified acrylic emulsions for architectural coatings.

Specifications Of Evonik Dynasylan SILFIN 75 Vinylsilane

Chemical TypeVinyltrimethoxysilane (VTMS)
Product FormLiquid
AppearanceColorless to pale yellow clear liquid
Density at 20 °C0.96–0.98 g/cm³
Refractive Index at 20 °C1.392–1.396
Flash Point (PMCC)24–26 °C
Storage Temperature5–30 °C, under dry, inert atmosphere
Shelf Life12 months from date of manufacture when stored properly


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