Vinyltriisopropenoxysilane: A Versatile Silane Coupling Agent

Vinyltriisopropenoxysilane: A Versatile Silane Coupling Agent

Vinyltriisopropenoxysilane (CAS No. 15332-99-7) is a silane coupling agent that can be used to improve the adhesion, compatibility and durability of various materials and coatings. It has a vinyl group that can react with unsaturated polymers, such as acrylics, polyesters and styrenics, and three isopropenoxyl groups that can hydrolyze and form silanol groups, which can bond with inorganic substrates, such as glass, metal and ceramic.

Properties and Applications of Vinyltriisopropenoxysilane

Vinyltriisopropenoxysilane has the following physical and chemical properties:

– Molecular formula: C11H18O3Si
– Molecular weight: 226.34
– Boiling point: 73-75°C at 12 mmHg
– Density: 0.926 g/cm3
– Refractive index: 1.4360
– Vapor pressure: 5.3 Pa at 25°C
– Flash point: >38°C
– Water solubility: 130 mg/L at 20°C
– Hydrolytic sensitivity: 7 (reacts slowly with moisture/water)
– LogP: 3.8 at 20°C

Vinyltriisopropenoxysilane can be used for various applications, such as:

– As a crosslinking agent for unsaturated polymers, such as acrylics, polyesters and styrenics, to improve their thermal stability, mechanical strength and chemical resistance.
– As an adhesion promoter for coatings, paints and adhesives on inorganic substrates, such as glass, metal and ceramic, to improve their wetting, bonding and durability.
– As a modifier for inorganic fillers and pigments, such as silica, alumina and titanium dioxide, to improve their dispersion, compatibility and performance in polymer composites.
– As a coupling agent for fiber-reinforced plastics, such as glass fiber, carbon fiber and aramid fiber, to improve their interfacial adhesion and mechanical properties.

How to Use Vinyltriisopropenoxysilane

Vinyltriisopropenoxysilane can be used in different ways depending on the application and the desired effect. Some of the common methods are:

– Blending with the polymer resin or coating formulation before curing or drying.
– Coating or grafting on the surface of the inorganic substrate or filler before mixing with the polymer matrix.
– Immersing or spraying on the surface of the fiber before impregnating with the polymer resin.

The optimal dosage and conditions of vinyltriisopropenoxysilane depend on various factors, such as the type and amount of the materials involved, the processing method and equipment, the environmental conditions and the performance requirements. It is recommended to conduct experiments and tests before using vinyltriisopropenoxysilane for a specific application.

Safety and Handling of Vinyltriisopropenoxysilane

Vinyltriisopropenoxysilane is a flammable liquid that may cause irritation to eyes, skin and respiratory system. It should be handled with care and according to the following precautions:

– Wear suitable protective clothing, gloves and eye/face protection.
– Avoid contact with skin, eyes and clothing.
– Avoid breathing vapors or mists.
– Keep away from heat, sparks, open flames and other sources of ignition.
– Store in a cool, dry and well-ventilated place.
– Dispose of waste and residues in accordance with local regulations.

For more information on vinyltriisopropenoxysilane, please refer to its MSDS or contact its suppliers.


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