(Trimethoxysilyl)ethene KBM-1003 CAS 2768-02-7

Vinyltrimethoxysilane, also known as A-171, KBM-1003 or Y-4302, is an organosilicon compound with the chemical formula CH₂=CHSi(OCH₃)₃. It is a clear, colorless liquid that belongs to the class of organosilanes, which are silicon compounds containing organic functional groups. Vinyltrimethoxysilane is widely used in various industrial applications, particularly in the fields of materials science, coatings, adhesives, and surface treatments.

One of the key properties of vinyltrimethoxysilane is its ability to undergo hydrolysis in the presence of water. This hydrolysis reaction results in the formation of silanol groups (-SiOH) on the surface of the material being treated. These silanol groups can further condense with other silanol groups or react with other functional groups, allowing for the cross-linking and polymerization of the compound.

The vinyl functional group (CH₂=CH-) in vinyltrimethoxysilane provides it with unique characteristics. It enables the compound to participate in a range of chemical reactions, such as copolymerization and grafting onto polymer surfaces. This reactivity makes it a valuable precursor for the synthesis of various polymers, coatings, and adhesives, allowing for enhanced material properties, such as improved adhesion, durability, and chemical resistance.

Vinyltrimethoxysilane finds applications in industries such as automotive, electronics, construction, and textiles. It is commonly used as a coupling agent, which promotes adhesion between organic polymers and inorganic surfaces, such as glass, metal, or mineral fillers. By forming a strong bond between the organic and inorganic phases, it enhances the mechanical properties and stability of composite materials.

Moreover, vinyltrimethoxysilane is employed as a surface treatment agent, promoting the hydrophobicity and oleophobicity of various substrates. This can lead to water repellency, stain resistance, and anti-fouling properties in coatings and textiles.

However, it is important to note that vinyltrimethoxysilane is a reactive compound and requires careful handling. It is sensitive to moisture and should be stored in a dry environment to prevent premature hydrolysis. Adequate safety precautions and good ventilation should be maintained when working with this chemical.

Overall, vinyltrimethoxysilane is a versatile and valuable organosilane compound, widely utilized in industrial applications to improve material properties, enhance adhesion, and provide surface modifications. Its unique reactivity and functionality make it an essential component in the development of advanced materials and technologies.

❶ Hydrolysis: Vinyltrimethoxysilane is susceptible to hydrolysis, meaning it reacts with water molecules. This property enables it to form silanol (-SiOH) groups on surfaces, facilitating adhesion and surface modification.

❷ Reactivity: The vinyl functional group (CH₂=CH-) in vinyltrimethoxysilane allows it to engage in various chemical reactions. It can undergo copolymerization, grafting, and cross-linking reactions, leading to the synthesis of polymers with enhanced properties.

❸ Adhesion Promotion: Vinyltrimethoxysilane acts as a coupling agent, promoting adhesion between organic polymers and inorganic surfaces, such as glass, metals, or mineral fillers. It forms strong bonds at the interface, enhancing the mechanical strength and durability of composite materials.

❹ Surface Modification: By treating surfaces with vinyltrimethoxysilane, hydrophobic (water-repellent) and oleophobic (oil-repellent) properties can be imparted. This makes it useful for creating water-resistant coatings, stain-resistant surfaces, and anti-fouling treatments.

❺ Material Compatibility: Vinyltrimethoxysilane exhibits compatibility with various materials, including polymers, metals, ceramics, and glass. This broad compatibility allows for its widespread application across different industries.

❻ Thermal Stability: Vinyltrimethoxysilane demonstrates good thermal stability, making it suitable for use in applications that involve high temperatures.

❼ Volatility: Vinyltrimethoxysilane has moderate volatility, meaning it can evaporate or sublime at a relatively low rate. This characteristic can be advantageous for certain applications, such as thin-film deposition processes.  

❽ Chemical Resistance: The presence of the trimethoxysilyl groups in vinyltrimethoxysilane contributes to its chemical resistance. It can withstand exposure to acids, bases, and various solvents, enhancing the durability and longevity of treated materials.