3-Aminopropyltriethoxysilane 98%min (KH-550 / APTES, CAS 919-30-2) is a classic amino functional silane coupling agent. It contains reactive amino group and hydrolyzable ethoxy groups, which improve interfacial bonding between inorganic fillers and organic polymers, enhance mechanical strength, water resistance and adhesive performance of composites. TNJ Chemical is the key manufacturer and exporter since 2001. We guarantee high quality, competitive price, stable supply, fast delivery and tech support etc. To find more, please contact sales@tnjchem.com

Product Name 3-Aminopropyltriethoxysilane

CAS No. 919-30-2

EINECS No. 213-048-4

Molecular Formula C₉H₂₃NO₃Si

Appearance Colorless transparent liquid

Density (20℃) 0.944–0.948 g/cm³

Boiling Point 217 °C @760 mmHg

Flash Point 96 °C

Refractive Index (20℃) 1.420–1.422

Stability Sensitive to moisture; stable under sealed dry condition

Composite Materials: Sizing agent for glass fiber, improve mechanical strength and moisture resistance of glass fiber reinforced plastics.

Adhesives & Sealants: Adhesion promoter for epoxy, polyurethane, silicone and phenolic adhesives; boost bonding strength on glass, metal, mineral substrates.

Coatings: Additive for paints and primers to improve adhesion between coating and inorganic surfaces.

Mineral-filled Plastics & Cable Compounds: Surface treatment for fillers like silica, talc; enhance filler-resin compatibility for halogen-free flame retardant cables.

Packing Delivery & Storage

Packing: 200kg iron drum; small sample packaging available, customized packing acceptable.

Delivery: Samples available, bulk stock for prompt shipment. Shipment by sea/air to global ports.

Storage: Store in cool, dry, ventilated warehouse, tightly sealed. Keep away from moisture, acid and oxidants.

Shelf Life: 12 months under proper sealed storage.