3-Aminopropyltriethoxysilane Kh550
| Chemical Name: | 3-Aminopropyltriethoxysilane |
| Product Category: | Amino Silanes | Silane Coupling Agent |
| Structural Formula: |  |
| CAS No.: | 919-30-2 |
| EINECS: | 213-048-4 |
| Molecular Formula: | C₉H₂₃NO₃Si |
| Molecular Weight: | 221.14500 |
3-Aminopropyltriethoxysilane (KH550) Description
KH‑550 Silane Coupling Agent is a high-performance amino-functional silane, widely used to enhance the interfacial adhesion between organic polymers and inorganic substrates such as glass, mineral fillers, and metals. Its molecular structure features an active amino group (–NH₂) and hydrolyzable ethoxy groups (–OCH₂CH₃), which hydrolyze to form silanol (Si‑OH) that chemically bonds to substrate surfaces, providing durable adhesion and excellent interface coupling.
As one of the most trusted adhesion-enhancing silane coupling agents, KH‑550 is compatible with a variety of resin systems, including epoxy, polyester, polyurethane, and silicone rubber. Using Silico® KH‑550, manufacturers can achieve superior composite material strength, durability, and process stability, making it ideal for high-performance industrial applications.
Key Features
- Exceptional Interface Coupling: Forms a chemical bridge between inorganic fillers, glass fibers, and metals with organic polymers, enhancing composite material performance and long-term durability.
Improved Mechanical Properties: Enhances tensile, flexural, and shear strength while increasing moisture resistance and aging stability.
Optimized Filler Dispersion & Wetting: Improves dispersion and wetting of mineral fillers and fibers within resin matrices for smoother processing.
Wide Chemical Compatibility: Effective across epoxy, polyurethane, silicone, and other polymer systems, supporting 3‑aminopropyltriethoxysilane for adhesion enhancement applications.
Transparent Low-Viscosity Liquid: Silico® KH‑550 is a clear, easy-to-handle liquid, suitable for precision formulation.
Physical & Chemical Properties (Typical Values)
| Equivalent Product Name | KH550 Silane, Momentive A-1100, Dow Corning Z-6011, Wacker GENIOSIL GF93, Degussa AMEO, ShinEtsu KBM903, Chisso S330. |
| Equivalent Chemical Name | 1-Propanamine, 3-(triethoxysilyl)-;3-Aminopropyltriethoxysilane; |
| Physical Properties | A colorless clearly liquid with faint typical odor and soluble easily in solvent such as ethanol, acetone, benzene, toluene etc, insoluble in water, react with water or moisture easily and hydrolyze, flash point is 93℃, boiling point is 219℃, molecular weight is 196.4. |
| Appearance | Clear, colorless liquid |
| Purity | ≥95% (industrial grade) |
| Density (25 °C) | 0.94–0.95 g/cm³ |
| Refractive Index (n²⁵D) | 1.415–1.425 |
| Boiling Point | ~217 °C |
| Flash Point (Closed Cup) | ~96–98 °C |
| Solubility | Soluble in alcohols, ethers, and most organic solvents; hydrolyzes in contact with water |
Note: Values are typical and should be verified with supplier technical datasheets.
Functions & Benefits
1. Interface Coupling
KH‑550 acts as a reactive silane bridging agent, creating strong chemical bonds at the interface between inorganic fillers and polymers, significantly improving composite strength and durability. Using Silico® KH‑550, engineers can enhance high-performance FRP and reinforced plastics with predictable results.
2. Enhanced Adhesion
In adhesives, sealants, and coatings, KH‑550 functions as an adhesion promoter for silane-based systems, improving bond strength to glass, ceramics, metals, and other polar substrates while increasing moisture and weather resistance.
3. Optimized Filler Wetting & Dispersion
Enhances dispersion and wetting of fillers such as glass fibers, mineral powders, and other reinforcements within polymer matrices, ensuring smooth processing and uniform final product properties.
4. Composite Material Performance Enhancement
KH‑550 is ideal for glass fiber-reinforced resins, plastics, silicone rubbers, and other composites, improving flexural strength, thermal stability, and electrical insulation performance.
Typical Applications
Composite Manufacturing: Reinforced plastics, FRP, and other high-performance composites
Adhesives & Coatings: Enhances adhesion and moisture resistance
Filler Surface Modification: Glass fibers, mineral fillers, powders
Rubber & Plastics Modification: Improves mechanical performance and polymer compatibility
Electronics & Construction Materials: Insulation, casting, and weather-resistant composites
Silico® KH‑550 is a premium silane coupling agent for industrial composites, trusted in multiple high-performance applications.
Packaging, Storage & Safety
Packaging: 20 kg drums, 200 kg drums, or 950 kg IBC containers
Storage Conditions: Store in a dry, cool, and sealed environment, protected from moisture and light. Avoid prolonged exposure to air to prevent hydrolysis.
Packaging Specifications
Jessica G.
Get the Latest Pricing and Information
- Quick and helpful reply within 8 hours;
- Tailored solutions provided for your project;
- One-stop purchasing service.
KH550 Silane (CAS 919-30-2 ): Guide
Applications
- Resins: Boosts bonding in epoxy, polyester, phenolic, PBT, and polyamide.
- Composites: Enhances strength and filler compatibility.
Key Benefits
- Strengthens adhesion between resins and fillers.
- Improves thermal, moisture, and mechanical properties.
