Acetoxy silanes are a type of organosilicon compound that contains acetoxy (-OC(O)CH3) groups attached to silicon. Acetoxy silane-based crosslinkers are used for producing acetoxy moisture-curing silicone sealants. Using these silane compounds, hydroxy-functionalized silicone polymers are crosslinked to obtain a silicone elastomer under the effect of a catalyst and moisture. They are widely used in various industrial applications, including adhesives, sealants, coatings, and surface modifiers. One of the primary uses of acetoxy silanes is as a crosslinker in the production of silicone sealants and adhesives. The acetoxy groups react with water to form acetic acid, which initiates the crosslinking reaction between the silicone polymer chains. This results in a strong and flexible bond that is resistant to moisture and weathering.

OSi has been a global leader in the manufacturing of organosilanes for over 30 years. Acetoxy Silanes are essential crosslinking agents used in the production of acetoxy moisture-curing silicone sealants. These compounds facilitate the crosslinking of hydroxy-functionalized silicone polymers, resulting in durable silicone elastomers through the interaction with a catalyst and moisture.

During the curing process, acetoxy silanes release acetic acid, producing a distinct vinegar-like smell. This characteristic differentiates acetoxy-based sealants from neutral moisture-curing sealants, which are odorless or have a milder scent. While the acid ensures rapid curing, it may corrode sensitive substrates such as metals and electronic components, potentially causing discoloration on natural stones.

OSi provides pure acetoxy silanes, available both as standalone products and in blends, ready to be integrated into silicone formulations. As a trusted silicone manufacturer, OSi guarantees high-quality crosslinking agents tailored to customer specifications.

Comparing Acetoxy and Neutral Silicone Sealants

Types of Silicone Sealants:

• Acetoxy Silicone Sealants

• Neutral (Alkoxy) Silicone Sealants

Key Differences:

• Odor: Acetoxy silicone sealants emit a strong vinegar-like smell during curing.

• Curing Time: Acetoxy silanes ensure faster curing and tack-free times, often within minutes. Full curing may take up to 24 hours.

• Cost: Acetoxy silicone sealants are more affordable compared to neutral sealants.

Applications of Acetoxy Silanes

Acetoxy silanes are best suited for sealing sanitary spaces, including ceramic tiles, glass, and anodized aluminum. Their clarity makes them an ideal choice for glass-to-glass sealing, such as glass partition walls.

Acetoxy Silanes play a pivotal role in the silicone sealant industry as effective crosslinking agents. By selecting the right sealant type for the appropriate substrate, users can ensure long-lasting and durable sealing solutions. For specialized applications, OSi's comprehensive product range offers both acetoxy and neutral options to meet diverse sealing requirements.

We always want to ensure that our customers get the best price, so if you are interested in our Acetoxy Silanes (Crosslinking Agent) products, please contact us immediately and we will quote you as soon as possible.