Vinyltriethoxysilane

Product Overview of Vinyltriethoxysilane

Siwin-V32 is vinyltriethoxysilane, a vinyl-functional organosilane compound with the CAS number 78-08-0 and EINECS number 201-081-7. Its molecular formula is C8H18O3Si, with a molecular weight of 190.31 g/mol. Manufactured by Nanjing Siwin New Material Co., Ltd., this product serves as a silane coupling agent and crosslinking agent for industrial clients engaged in wire and cable production, polymer compounding, composite material manufacturing, and electronic component processing.

The molecular structure of vinyltriethoxysilane contains both a vinyl group (CH2=CH-) and three ethoxy groups (-OC2H5) bonded to a central silicon atom. This dual functionality enables the product to form chemical bonds with organic polymers through its vinyl group while simultaneously reacting with inorganic substrates through hydrolyzable ethoxy groups. This bridging mechanism improves interfacial adhesion between dissimilar materials in composite systems.

Vinyltriethoxysilane Technical Specifications

Additional physical properties include a boiling point of 160-161°C at atmospheric pressure and a flash point of approximately 34°C. The product is miscible with most organic solvents including ethanol, acetone, and toluene, and reacts slowly with water through hydrolysis.

Vinyltriethoxysilane Industrial Applications

Crosslinking Agent for XLPE Wire and Cable

Vinyltriethoxysilane functions as a crosslinking agent in the production of silane-crosslinked polyethylene (XLPE) insulation for wires and cables. During the extrusion process, the silane grafts onto polyethylene chains, and subsequent moisture curing forms siloxane crosslinks between polymer chains. This crosslinked structure enhances the thermal stability and mechanical strength of the insulation layer, allowing cables to operate at elevated temperatures while maintaining electrical insulation properties.

Crosslinked Polyethylene Pipe Manufacturing

In the production of PEX pipes used in plumbing and heating systems, vinyltriethoxysilane contributes to the silane crosslinking process. Crosslinked polyethylene pipes exhibit improved resistance to chemical corrosion and long-term hydrostatic pressure stability compared to non-crosslinked PE pipes. Manufacturers in the building materials and plumbing sectors incorporate this silane into their formulations to meet industry performance standards.

Polymer and Composite Modification

Vinyltriethoxysilane modifies the interface between polymer matrices and inorganic fillers. When used with polyethylene, polypropylene, or thermosetting resins, it improves the dispersion of fillers such as glass fibers, calcium carbonate, and silicates within the polymer phase. Enhanced interfacial bonding translates to improved tensile strength, flexural modulus, and dimensional stability in the final composite product.

Glass Fiber Surface Treatment

Glass fiber manufacturers apply vinyltriethoxysilane as a sizing agent to treat fiber surfaces before incorporation into resin matrices. The silane forms a chemical bridge between the glass surface and resins such as unsaturated polyester, improving the mechanical properties and moisture resistance of fiber-reinforced plastics. This treatment is relevant for producers of fiberglass composites used in automotive, marine, and construction applications.

Electronic Component Moisture Protection

Vinyltriethoxysilane serves as a surface treatment agent for electronic components requiring moisture barrier properties. Applied as a thin coating, it forms a hydrophobic layer that reduces humidity-induced performance degradation in semiconductor packages and circuit assemblies. Electronics manufacturers use this treatment to extend the operational lifespan of components exposed to humid environments.

Vinyltriethoxysilane Packaging and Storage

Siwin-V32 vinyltriethoxysilane is available in two standard packaging configurations for commercial procurement: 210L iron drums containing 190 kg per drum, and 1000L IBC containers holding 900 kg per container. Custom packaging options can be arranged for enterprise customers with specific volume requirements.

The product should be stored in tightly sealed containers at room temperature in a dry, shaded area. Exposure to moisture must be avoided, as the ethoxy groups react with water through hydrolysis. Storage areas should be separated from alkali and acid materials and positioned away from sources of ignition. Under proper storage conditions, the product maintains its specifications for a defined shelf life from the date of manufacture.

Vinyltriethoxysilane Quality Assurance

Nanjing Siwin New Material Co., Ltd. operates under an ISO 9001 quality management system. Each batch of Siwin-V32 undergoes gas chromatography (GC) analysis to verify purity levels, along with density and refractive index measurements conducted under controlled temperature conditions. Batch traceability records are maintained for every production lot.

The company's production facility in Hubei Province is equipped for large-scale silane manufacturing, with established supply chain capabilities serving domestic and international markets. Technical support staff assist commercial users with formulation guidance, application troubleshooting, and regulatory documentation for import and export procedures.

FAQ About Vinyltriethoxysilane

What is the shelf life of vinyltriethoxysilane?

When stored in unopened, sealed containers under recommended conditions — dry environment, room temperature, and protection from direct sunlight — vinyltriethoxysilane typically maintains its specified properties for 12 months from the date of manufacture. Actual shelf life may vary based on storage conditions and container integrity.

How does vinyltriethoxysilane work as a coupling agent?

Vinyltriethoxysilane functions as a coupling agent through its dual-reactive molecular structure. The ethoxy groups hydrolyze in the presence of moisture to form silanol groups, which react with hydroxyl groups on inorganic surfaces such as glass, minerals, and metal oxides. The vinyl group simultaneously participates in polymerization or grafting reactions with organic polymers. This creates a covalent chemical bridge between the inorganic and organic phases, improving adhesion and composite performance.

What packaging options are available for bulk orders?

Standard packaging includes 190 kg iron drums and 900 kg IBC containers. For large-volume industrial applications, additional packaging configurations such as ISO tank containers can be arranged. Procurement teams should contact the sales team to discuss specific volume requirements and lead times.

Is vinyltriethoxysilane classified as a hazardous material for transport?

Vinyltriethoxysilane has a flash point of approximately 34°C, which places it in the flammable liquid category for transportation purposes. Shippers must follow applicable regulations for packaging, labeling, and documentation based on the transport mode and destination country. Safety data sheets (SDS) provide detailed handling and emergency response information.