Description

4-Aminobutyltriethoxysilane is a bifunctional organosilane coupling agent containing both an amino group and hydrolyzable ethoxy groups. This dual functionality makes it a critical component for enhancing adhesion and compatibility between inorganic materials and organic polymers. It is primarily used by manufacturers in the composites, coatings, and sealants industries to improve the mechanical properties and durability of their products.

Application

• Glass Fiber and Mineral Reinforcements: As a key sizing agent to improve the bonding between glass fibers and polymer matrices in fiberglass-reinforced plastics (FRP) and composites.
• Adhesives and Sealants: To promote adhesion to difficult-to-bond substrates like glass, metals, and minerals, enhancing bond strength and moisture resistance.
• Surface Modification of Fillers: For treating silica, clay, and other mineral fillers to improve their dispersion and compatibility in rubber and plastic compounds.
• Primers and Coupling Agents: Formulated into primers for coatings on metal, glass, or concrete to ensure long-lasting adhesion and corrosion protection.
• Epoxy and Polyurethane Systems: Acts as an adhesion promoter and curing agent modifier, improving the performance of high-performance coatings and encapsulants.
• Waterborne Systems: Used to enhance the performance of aqueous coatings and adhesives by improving substrate wetting and adhesion.

Basic Information

Product Name	4-Aminobutyltriethoxysilane
CAS No.	3069-30-5
Molecular Formula	C10H25NO3Si
Molecular Weight	235.40 g/mol
Synonyms	N-(3-Triethoxysilylpropyl)-1,4-butanediamine (incorrect but common); (3-Aminopropyl)triethoxysilane (common misnomer for shorter chain); 4-Aminobutyltriethoxysilane; 3-Triethoxysilylpropyl-1,4-butanediamine; N-[3-(Triethoxysilyl)propyl]-1,4-butanediamine; γ-Aminobutyltriethoxysilane; Amino functional silane; Silane coupling agent KH-792 (related trade name); A 1120 (related trade name).
EINECS	221-312-0

Quality Control

Our production of 4-Aminobutyltriethoxysilane adheres to strict quality management protocols. Every batch is analyzed to ensure it meets precise chemical and physical specifications, including purity, amine content, and refractive index. A comprehensive Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee consistency and performance for your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C/59-77°F). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent hydrolysis and degradation upon contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.420 - 1.425
Density (g/mL, 25°C)	0.940 - 0.960
Amino Value	Contact for details

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