Overview
Diacetoxydimethylsilane is an organosilicon compound primarily used as a crosslinking agent in silicone-based products. Its reactive acetoxy groups enable it to form bonds with hydroxyl-containing materials, making it valuable in adhesives and sealants. This chemical is commercially available in liquid form and is often handled under inert conditions due to its moisture sensitivity. It plays a crucial role in industrial applications where durable, flexible silicone polymers are required.
Physical and Chemical Properties
Diacetoxydimethylsilane is a colorless to pale yellow liquid with a characteristic acetic acid odor. It has a molecular weight of 176.25 g/mol and a density of approximately 1.05 g/cm³. The compound reacts readily with moisture, releasing acetic acid and forming siloxane bonds. This property makes it effective as a crosslinker but also necessitates careful handling. It is soluble in common organic solvents but reacts violently with strong oxidizers.
Main Applications
The primary use of diacetoxydimethylsilane is in the production of room-temperature vulcanizing (RTV) silicone sealants and adhesives. It acts as a crosslinking agent, enabling the formation of flexible, durable bonds. Additional applications include its use in specialty coatings and as an intermediate in silicone resin production. In construction and automotive industries, it contributes to weather-resistant sealing compounds that maintain elasticity over wide temperature ranges.
Safety and Storage
Diacetoxydimethylsilane is corrosive and can cause severe skin burns and eye damage. Proper personal protective equipment (PPE) including gloves, goggles, and respiratory protection is essential when handling this chemical. Storage requires airtight containers in cool, dry environments, preferably under nitrogen atmosphere to prevent moisture absorption. Spills should be neutralized with inert absorbents, and contaminated areas must be ventilated thoroughly due to acetic acid release.
B2B Procurement Guide
When sourcing diacetoxydimethylsilane, prioritize suppliers who provide detailed certificates of analysis (CoA) confirming purity (typically ≥95%) and low moisture content. Bulk purchases often come in 25 kg or 200 kg drums, with prices varying based on quantity and supplier reputation. Key procurement considerations include verifying packaging integrity (moisture-proof seals) and evaluating the supplier's ability to provide technical support for application-specific formulations. Lead times may vary due to the compound's specialized nature.
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