3-Glycidyloxypropyltrimethoxysilane 2530-83-8, commonly known simply as glycidyl trimethoxy silane or glycidoxypropyltrimethoxysilane, is an organo functional silane compound with chemical formula C9H20O5Si. It is a colorless liquid that is miscible with ethanol, methanol, acetone and many organic solvents.
Glycidyl trimethoxy silane functions as an adhesion promoter and coupling agent. The epoxy group in its molecular structure reacts with a variety of substrates, enhancing adhesion and cohesion between dissimilar materials.
It is mainly used to improve the bonding between organic resins or polymers and inorganic materials like glass, ceramic, metal and mineral fillers. Some common applications of glycidyl trimethoxy silane include:
• Coupling resin matrix composites to glass or ceramic fibers
• Improving the adhesion of coatings to metal, concrete and mineral substrates
• Acting as an interfacial agent for fiber-reinforced plastics
• Bonding rubber to steel in tire cord applications
In industry, glycidyl trimethoxy silane is typically applied through solvent-based solutions, 100% active liquid formulations or condensation with water to generate methoxy silanol intermediates on the substrate surface. The epoxy group then reacts with hydroxyl or amine groups on the substrate, forming covalent bonds.
The properties that make glycidyl trimethoxy silane useful as an adhesion promoter include its high reactivity with organic compounds, ability to hydrolyze easily in water, and the presence of both epoxy and alkoxy groups in its structure. It has good storage stability and a wide service temperature range after curing.