Overview
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Overview

Organofunctional silanes are bi-functional molecules in that they usually have two types of reactivity built into their structures -organic and inorganic.

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Monomeric silicon chemicals are known as silanes. A silane that contains at least one silicon carbon bond (e.g., Si-CH3) is an organosilane. The carbon-silicon bond is very stable and none polar, and in the presence of an alkyl group it gives rise to low surface energy and hydrophobic effects.

Organofunctional silanes are molecules carrying two different reactive groups on their silicon atom so that they can react and couple with very different materials (e.g., inorganic surfaces and organic resins via covalent bonds and often via a polymeric “transition” layer between these different materials).

 

The value of organofunctional silanes as coupling agents was discovered in the 1940s, during the development of fiberglass-reinforced composites. When initially fabricated, these new composites were very strong, but their strength declined rapidly during aging underwater. This weakening was caused by a loss of bond strength between the glass fibers and the resin. Researchers found that certain organofunctional silanes prevented ingress of water and bond displacements at the fiber/resin interface but also significantly increased the composite initial strength.

 

At 1950, the Chinese Academy of Sciences (ICCAS) developed several α-silane like 3-Aminopropyltriethoxysilane (CAS# 919-30-2), 3-Glycidoxypropyltrimethoxysilane (CAS# 2530-83-8), 3-Methacryloxypropyltrimethoxysilane (CAS# 2530-85-0), 3-Mercaptopropyltrimethoxysilane (CAS# 4420-74-0); and at 1954 Professor Zhou Qingli of Nanjing University synthesized a series of γ-silane. After that the commercial production of organofunctional silane in China has been begun. With 60 years development Chinese organofunctional silane industry has been a competitive industry in the global market, with the mature upstream and downstream system, advanced technology and rich experience, we can supply a good product at a good price.

 

Now organofunctional silane has a wide application at the resin based composites or coating applications such as coating, paint, ink, adhesive, sealant, rubber, tire, plastic, cable, pipe, building protection, filler, pigment, glass fiber and mineral/glass wool insulation. It is versatile and can used as coupling agent, adhesion promoter, crosslinking agent, dispersion aid, water repellent, water scavenger, more application is still under development.

 

 

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