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Adhesives Ingredients
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Dynasylan® VPS 4721

Technical Datasheet | Supplied by Evonik
Dynasylan® VPS 4721 by Evonik functions as a crosslinking agent, adhesion promoter and/or surface modifier. It is a high molecular weight, bifunctional organosilane possessing a reactive organic epoxide and hydrolyzable inorganic methoxysilyl groups. It can bind chemically to both inorganic materials including glass, metals, fillers as well as organic polymers such as thermosets, thermoplastics and elastomers. It is a novel ingredient for sealants and adhesives as a primer or additive. Offers improved flexural strength, tensile strength, impact strength and modulus of elasticity. Provides improved moisture & corrosion resistance and electrical properties including dielectric constant and volume resistivity. Exhibits better adhesion on substrates and improved storage stability of formulations. It can be used for filler dispersions, viscosity reduction, increased filler loading and non yellowing applications. Suitable for epoxy, phenolic, PU, PVAC, acrylates and polysulfides. Shelf life of Dynasylan® VPS 4721 is 12 months.
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Dynasylan® VPS 4721
Technical Datasheet | Supplied by Evonik
REQUEST A SAMPLE ORIGINAL DATASHEET CONTACT SUPPLIER
Product Type
  • Adhesion Promoters > Organofunctional Silanes
  • Crosslinking / Curing / Vulcanizing Agents > Silanes
Chemical Composition
Epoxy functional silane
Physical Form
Liquid
Appearance
Colorless
Product Status
COMMERCIAL
Applications/ Recommended for
  • Adhesives
  • Sealants
  • Polymers > Epoxies (EP)
  • Polymers > Polysulfides
  • Polymers > Acrylics & Acrylic Copolymers
  • Polymers > Polyurethanes
  • Polymers > Polyvinyl Acetate Emulsions & Derivatives (PVAc)

Dynasylan® VPS 4721 Properties

Property

Value & Unit
Test Condition
Test Method
Flash Point
> 95 °C
DIN EN ISO 2719
Viscosity
750 - 1350 mPa-s
(At 20°C)
DIN 53015

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