Description

3-Aminopropyltriethoxysilane is a bifunctional organosilane coupling agent featuring both a reactive amino group and hydrolyzable ethoxy groups. This unique structure makes it essential for creating strong, durable bonds between inorganic materials and organic polymers. It is a critical raw material for manufacturers in the composites, coatings, adhesives, and sealants industries seeking to enhance material performance and longevity.

Application

• Glass Fiber & Mineral Reinforcement: Primarily used as a key sizing agent for fiberglass and mineral fillers (e.g., silica, clay) to improve adhesion and mechanical properties in epoxy, phenolic, and polyamide composites.
• Adhesives & Sealants: Functions as an adhesion promoter on glass, metal, and mineral surfaces, significantly improving bond strength and moisture resistance in silicone, polyurethane, and epoxy-based formulations.
• Surface Modification & Primers: Used to prepare metal, glass, and concrete surfaces by forming a functional amine-terminated monolayer, enhancing the adhesion of subsequent coatings, paints, or inks.
• Silica & Nanoparticle Treatment: Modifies the surface of silica, carbon black, and other nanoparticles to improve their dispersion and compatibility within polymer matrices like rubbers and plastics.
• Crosslinking Agent: Serves as a crosslinker or chain extender in polymer synthesis and can be used to create silane-modified polymers (SMP) with improved properties.
• Biomedical & Chromatography: Utilized to functionalize glass or silica surfaces for the immobilization of biomolecules, enzymes, or as a stationary phase in chromatography columns.

Basic Information

Product Name	3-Aminopropyltriethoxysilane
CAS No.	919-30-2
Molecular Formula	C9H23NO3Si
Molecular Weight	221.37 g/mol
Synonyms	APTES; γ-Aminopropyltriethoxysilane; 3-(Triethoxysilyl)propylamine; (3-Aminopropyl)triethoxysilane; Triethoxy(3-aminopropyl)silane; A 1100 (OSi Specialties); KBE 903 (Shin-Etsu); Dynasylan AMEO (Evonik); Silquest A-1100; 3-Triethoxysilylpropylamine
EINECS	213-048-4

Quality Control

Our 3-Aminopropyltriethoxysilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) for purity and assay, to ensure it meets precise specifications and consistent performance for industrial applications. A Certificate of Analysis (COA) detailing all quality parameters is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent contact with atmospheric moisture, which can lead to hydrolysis and polymerization.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0 %
Refractive Index (n20/D)	1.420 - 1.425
Density (20°C)	0.94 - 0.96 g/mL

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.