Multifunctional Silane Coupling Agent – The Key Role of 3-Aminopropyltriethoxysilane (IOTA-550) in the Field of Composite Materials-Iota

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News > Dynamic industry > Multifunctional Silane Coupling Agent – The Key Role of 3-Aminopropyltriethoxysilane (IOTA-550) in the Field of Composite Materials

Multifunctional Silane Coupling Agent – The Key Role of 3-Aminopropyltriethoxysilane (IOTA-550) in the Field of Composite Materials

3-Aminopropyltriethoxysilane (IOTA-550) holds a significant position in the field of chemical materials due to its unique chemical structure and outstanding performance. Its CAS number is 919-30-2, with a structural formula of NH₂-CH₂CH₂CH₂-Si(-OCH₂CH₃)₃, a molecular weight of 221.37, and a molecular formula of C₉H₂₃NO₃Si. These precise identifiers serve as its unique “chemical identity code.”
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In terms of physical and chemical properties, 3-aminopropyltriethoxysilane appears as a colorless to light yellow transparent liquid, pure and refined in appearance. It has a main content of ≥96.0%, a refractive index of 1.4175–1.4200 at 25°C, a boiling point of 217°C under 760 mmHg, and a density of 0.9390–0.9430 g/ml. Each specification clearly highlights its stable and distinctive characteristics.

What sets this compound apart is the presence of two different reactive functional groups within its molecular structure. These groups act as “molecular bridges” between organic polymers and inorganic fillers, significantly enhancing their bonding ability. As a result, the mechanical strength, electrical properties, water resistance, and aging resistance of end products are greatly improved. In practical applications, it is widely used in glass fiber treatment, textile auxiliaries, and adhesives.

As a glass fiber treatment agent, it significantly enhances the mechanical strength, electrical performance, and aging resistance of composite materials. It is highly compatible with various resins such as polyester, epoxy, and phenolic resins, and is broadly used in the production of mechanical parts, building materials, pressure vessels, and specialty reinforced materials. Additionally, it serves as an adhesion promoter between rubber and metal and functions as a reinforcing agent for self-curing resin sand cores in the foundry industry. It is also well-suited for fillers such as glass fiber, fiberglass cloth, silica, and talc.

Due to its chemical properties, 3-aminopropyltriethoxysilane must be stored with care—sealed tightly and kept in a dry, cool, and dark indoor environment. It is packaged in plastic drums available in 5 kg, 25 kg, and 200 kg specifications to meet diverse application needs.

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