Product Introduction
Triethoxyvinylsilane (CAS 78-08-0), commonly known as VTEO or A-151, is a bifunctional organosilane. It features a reactive vinyl group and three hydrolyzable ethoxy groups. This unique structure allows it to act as a molecular bridge between inorganic substrates (like glass, silica, or metal) and organic polymers (like polyethylene). It is a cornerstone material in the wire and cable industry for producing cross-linked polyethylene (XLPE) and is widely used to improve the mechanical properties and environmental resistance of composites and coatings.
产品卖点 (Product Selling Points)
1. Efficient Crosslinking for XLPE
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Advantage: Readily grafts onto the polyethylene backbone, enabling moisture-initiated crosslinking.
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Benefit: Superior Insulation: Significantly enhances the heat resistance, mechanical strength, and chemical durability of power cable insulation, extending service life in harsh underground environments.
2. Versatile Coupling Capabilities
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Advantage: Strong chemical bonding between organic resins and inorganic fillers/fibers.
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Benefit: Enhanced Composite Strength: Improves the wet-strength, electrical properties, and transparency of glass-fiber reinforced plastics (FRP) and mineral-filled polymers.
3. Ethoxy Silane Stability
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Advantage: Hydrolyzes more slowly than methoxy silanes, releasing ethanol instead of methanol.
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Benefit: Safer Handling: Offers a more controlled reaction rate and a lower toxicity profile during the application process, making it more environmentally friendly for industrial use.
Applications
Wire & Cable Industry
The primary crosslinking agent for Silane-Crosslinked Polyethylene (XLPE), used in low and medium voltage power cables.
Polymer Modification
Grafted onto polymer chains (PE, EVA, Acrylics) to create moisture-curable resins with improved thermal stability and weatherability.
Surface Treatment
Used as a coupling agent for glass fibers, fillers (like silica and kaolin), and metals to improve adhesion in adhesive and sealant formulations.
Paint & Coatings
Incorporated into moisture-curable coatings to enhance water repellency, scratch resistance, and adhesion to inorganic substrates.
Packaging & Storage
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Packaging: 190kg UN-certified steel drums; 900kg IBC tanks.
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Storage: Store in a cool, dry, and well-ventilated area. Crucial: Extremely sensitive to moisture. Containers must be hermetically sealed and stored under a dry nitrogen blanket. Keep away from heat, sparks, and open flames. Once opened, use quickly to prevent gelation.
Synonyms
Vinyltriethoxysilane; VTEO; Triethoxy(vinyl)silane; Silane A-151; Geniosil GF 56.
Matching Materials
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Polyethylene (PE) (CAS 9002-88-4) —— Base polymer for silane grafting and XLPE production
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Dibutyltin Dilaurate (DBTDL) (CAS 77-58-7) —— Common catalyst for silane crosslinking reactions
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Precipitated Silica (CAS 7631-86-9) —— Inorganic filler often treated with VTEO to improve dispersion
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Glass Fiber —— Reinforcement material that requires silane sizing for better resin bonding
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DCP (Dicumyl Peroxide) (CAS 80-43-3) —— Initiator used for grafting vinyl silane onto polymers
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Ethanol (CAS 64-17-5) —— The byproduct released during the hydrolysis of this silane
FAQ
Q: What is the difference between Vinyltrimethoxysilane (VTMO) and Vinyltriethoxysilane (VTEO)?
A: VTEO (this product) releases ethanol upon hydrolysis, while VTMO releases methanol. VTEO reacts more slowly, which is often preferred for applications requiring a longer pot life or safer working conditions.
Q: Why must this product be kept away from moisture?
A: Triethoxyvinylsilane reacts with water (moisture in the air) to undergo hydrolysis and condensation, which will cause the liquid to turn cloudy and eventually solidify into a gel, making it unusable.
Q: Can VTEO be used to improve the water resistance of coatings?
A: Yes. By crosslinking or bonding with the substrate, it creates a hydrophobic barrier that significantly reduces water penetration and improves the durability of the coating.
Q: Is this product compatible with all polymers?
A: It is most effective with polyolefins (like PE and EVA) via grafting, and with resins that can react with the vinyl group or the silanol groups formed after hydrolysis.
Q: How do I ensure a good bond when using it as a primer?
A: The substrate surface must be clean and dry. A dilute solution (1-5% in ethanol or an alcohol/water mixture) is typically applied and allowed to dry/react before applying the main coating or resin.
