Siwin-V121
Siwin
Siwin-V121
16753-62-1
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Methylvinyldimethoxysilane is a vinyl-functional silane compound with internal product designation Siwin-V121. It carries CAS registry number 16753-62-1, and functions as a coupling agent, adhesion promoter, and cross-linking agent in industrial polymer and rubber manufacturing. The product contains both vinyl unsaturation and methoxysilyl reactivity, enabling dual functionality in organic polymer systems and inorganic material interfaces.
Designed for commercial procurement and industrial formulation applications, this vinyl silane supports production processes in rubber manufacturing, polyolefin modification, and plastic compounding industries. It is produced with controlled purity to ensure consistent performance across batch production runs.
The molecular formula of methylvinyldimethoxysilane is C₅H₁₂O₂Si, with a molecular weight of 132.23 g/mol. Its methoxy groups hydrolyze under moist conditions to form silanol groups, which bond with hydroxyl groups on the surface of mineral fillers, glass, and metal substrates. The vinyl group participates in free radical polymerization, grafting reactions, and crosslinking processes with organic polymers.
This dual reactivity allows the silane to act as a molecular bridge between inorganic materials and organic polymer matrices, improving interfacial adhesion, filler dispersion, and overall composite material performance. In polyolefin systems, the vinyl group enables grafting onto polymer chains, introducing alkoxysilane groups that support moisture-induced crosslinking.
Parameter | Specification | Test Condition |
|---|---|---|
Product Code | Siwin-V121 | - |
Chemical Name | Methylvinyldimethoxysilane | - |
CAS Number | 16753-62-1 | - |
Molecular Formula | C₅H₁₂O₂Si | - |
Molecular Weight | 132.23 g/mol | - |
Appearance | Colorless clear liquid | Visual inspection at 25℃ |
Purity | ≥ 98% | Gas chromatography |
Boiling Point | 106 ℃ | 101.3 kPa |
Density | 0.884 g/cm³ | 20℃ |
Refractive Index (n25D) | 1.395 | 25℃ |
Flash Point | 12℃ | Closed cup |
HS Code | 2931900090 | Customs classification |
Methylvinyldimethoxysilane is employed in the production of sulfur-cured and peroxide-cured rubber products. It acts as a crosslinking aid and adhesion promoter in rubber compounding, improving the bonding between rubber polymers and inorganic fillers such as silica, clay, and calcium carbonate. This modification enhances the tensile strength, tear resistance, and aging resistance of vulcanized rubber articles.
It is compatible with polyester, polyolefins, styrenics, acrylics, and other polymer materials used in rubber and elastomer manufacturing. The product can be added during the internal mixing stage of rubber processing, with dosage adjusted based on filler loading and target crosslink density.
The vinyl silane can be copolymerized with ethylene monomers during polymerization, or grafted onto finished polyethylene resins, to introduce moisture-curable alkoxysilane groups into the polymer structure. Modified polyethylene materials undergo crosslinking when exposed to moisture and appropriate catalysts, forming a three-dimensional network structure that improves heat resistance, chemical resistance, and mechanical strength.
This application is widely used in the production of crosslinked polyethylene pipes, cable insulation materials, and heat-shrinkable products. The moisture cure process enables crosslinking after extrusion or molding, supporting flexible manufacturing workflows for industrial plastic product makers.
In plastic compounding, Siwin-V121 is used to treat mineral fillers to improve their compatibility with non-polar polymer matrices such as polyethylene and polypropylene. Surface-treated fillers exhibit better dispersion in polymer melts, reducing compound viscosity and improving processing efficiency. The improved interfacial bonding also enhances the mechanical properties and dimensional stability of filled plastic products.
The product can be applied to filler surfaces via dry treatment or wet treatment methods, depending on production equipment and process requirements. It is suitable for both filled polyolefin compounds and reinforced polyester composite materials.
Siwin-V121 is offered in standard industrial packaging configurations to accommodate different order volumes for enterprise customers and commercial users:
200 L PVF steel drum: 150 kg net weight per drum, standard packaging for regular production orders
1000 L IBC container: 750 kg net weight per container, available for bulk commercial procurement
Custom packaging specifications and container types can be arranged upon request to match specific logistics and production requirements.
The product should be stored in a cool, dry, and well-ventilated warehouse, with ambient temperature kept between 0℃ and 30℃. Containers must remain tightly sealed when not in use to prevent moisture contact and volatilization. Due to its low flash point, the product should be stored away from heat sources, open flames, and direct sunlight, in compliance with flammable liquid storage regulations.
Under proper storage conditions in original sealed containers, the product has a shelf life of 12 months from the date of manufacture. Material safety data sheets are available upon request, providing detailed guidance on safe handling, personal protection, and emergency response procedures.
The standard grade of Siwin-V121 has a minimum purity of 98% as measured by gas chromatography. Each production batch is tested and supplied with a certificate of analysis listing actual purity values and key physical parameters for incoming quality verification.
Yes, methylvinyldimethoxysilane is suitable for use in both sulfur-cured and peroxide-cured rubber systems. Its vinyl functional group participates in free radical crosslinking reactions initiated by peroxides, supporting crosslink network formation and interfacial adhesion improvement.
For bulk orders, the product is available in 200 L PVF steel drums and 1000 L IBC containers. Custom packaging solutions can also be coordinated for large-volume commercial procurement and dedicated production lines.
When stored in original, unopened containers under cool, dry conditions away from heat and moisture, the product has a shelf life of 12 months from the date of manufacture. Material that exceeds the shelf life can be retested to confirm whether it still meets specification requirements.
