Silance coupling agent (KH-540)
Chemical name: 3-Aminopropyltrimethoxysilane
CAS: 13822-56-5
MF: C6H17NO3Si
MW: 179.29
Appearance: Colorless liquid
Package: 200L drum
Origin: China
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- Mr.Sam
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Product Introduction
Silane Coupling Agent KH-540 | 3-Aminopropyltrimethoxysilane|CAS 13822-56-5
1. Product Introduction
KH-540, chemically defined as 3-Aminopropyltrimethoxysilane, is a high-efficiency amino-functional silane coupling agent with CAS number 13822-56-5. It appears as a colorless to slightly pale yellow transparent oily liquid at room temperature. Featuring unique reactive amino groups and hydrolyzable methoxy groups in its molecular structure, KH-540 belongs to the most versatile universal amino silane series, delivering stable interfacial bonding performance for organic-inorganic composite systems.
As a classic multi-purpose silane modifier widely adopted in global industrial manufacturing, KH-540 effectively bridges inorganic substrates such as glass fiber, silica powder, metal, ceramic and mineral fillers with organic polymers including epoxy, polyester, acrylic and polyurethane resins. It significantly enhances interfacial adhesion, mechanical strength, water resistance, chemical stability and weather resistance of composite materials. With excellent universality and stable modification effects, KH-540 is extensively applied in glass fiber reinforcement, coating adhesion improvement, adhesive modification, and inorganic filler surface treatment industries worldwide.
2. Product Specifications
| Test Item | Standard Specification | Test Condition / Method |
| Chemical Name | 3-Aminopropyltrimethoxysilane | – |
| CAS No. | 13822-56-5 | – |
| Molecular Formula | C₆H₁₇NO₃Si | – |
| Appearance | Colorless to pale yellow transparent liquid | Visual Inspection |
| Purity | ≥98.0% | GC Test |
| Refractive Index (nD20) | 1.4220–1.4260 | 20℃ |
| Density (g/cm³) | 1.010–1.020 | 25℃ |
| Boiling Point | 204℃ | Normal Pressure |
| Flash Point | 82℃ | Closed Cup |
| Moisture Content | ≤0.2% | Karl Fischer Method |
3. Product Features & Applications
Core Product Features
- Dual reactive functional structure: KH-540 contains active amino groups and hydrolyzable methoxy groups. The amino group reacts with organic resin functional groups, while methoxy groups hydrolyze and bond with hydroxyl groups on inorganic surfaces, forming stable chemical crosslinking bridges and significantly improving interface bonding strength.
- Excellent universal compatibility: Perfectly compatible with epoxy, polyurethane, polyester, acrylic, phenolic resin and most polymer materials, suitable for almost all organic-inorganic composite modification scenarios with extremely wide applicability.
- Superior adhesion & weather resistance: Effectively enhances the bonding force between coatings, adhesives and metal, glass, ceramic substrates. It improves water resistance, acid and alkali resistance, aging resistance and mechanical stability of finished products.
- Stable hydrolysis & low volatility: Moderate hydrolysis speed, stable reaction activity and low volatilization loss during processing. It maintains consistent modification effects and will not cause product performance attenuation due to rapid failure.
- Cost-effective & easy to use: Low additive dosage, obvious performance improvement, simple processing operation, suitable for large-scale continuous industrial production and various formula systems.
Main Application Fields
- Glass Fiber Reinforced Composites: Used as a key surface treatment agent for glass fiber, improving the bonding compatibility between glass fiber and resin matrix. It greatly enhances the tensile strength, bending resistance and water resistance of fiberglass-reinforced plastics, widely used in FRP products, insulation materials and structural parts.
- Coating & Paint Industry: Serves as adhesion promoter and anti-corrosion auxiliary for epoxy coatings, polyurethane coatings and industrial anti-corrosion paints. It solves the problem of poor coating adhesion and easy peeling on metal and inorganic surfaces, improving coating durability and anti-rust performance.
- Adhesive & Sealant Modification: Applied in epoxy adhesives, polyurethane sealants and industrial bonding agents to improve the bonding strength between glue layer and glass, metal, concrete substrates, enhancing peel resistance and aging stability of adhesive products.
- Inorganic Filler Surface Treatment: Used for surface modification of silica, talc, calcium carbonate, clay and other mineral fillers, improving filler dispersion in organic resins, reducing system viscosity and enhancing product mechanical toughness.
- Electronic & Insulation Industry: Applied in electrical insulation coatings and electronic potting materials to improve material compactness, moisture resistance and dielectric stability, ensuring long-term safe operation of electrical and electronic equipment.
4. Packaging, Storage & International Sea Shipping
Packaging Standard
Standard export package: 200kg iron drum. Customized small packages of 25kg drums and 1000kg IBC totes are available upon customer request. All packaging drums adopt professional sealing and anti-leakage treatment, fully compliant with international sea transportation stacking and long-distance logistics standards.
Storage Requirements
Store KH-540 silane coupling agent in a cool, dry, ventilated and shaded warehouse environment. Keep away from high-temperature heat sources, open flames, strong oxidants, acidic substances and direct sunlight to prevent hydrolysis, deterioration and performance attenuation. All packages must be completely sealed to avoid moisture absorption. The valid shelf life is 12 months under standard storage conditions. Expired products need re-inspection before use; only qualified products can be put into production.
International Shipping & Hazard Classification
Hazardous Goods Confirmation: KH-540 Silane Coupling Agent is Class 8 Corrosive Liquid
UN Number: UN 2735
Hazard Grade: 8 (Corrosive Substances)
Packing Group: III
Shipping Notes: As Class 8 dangerous goods, transportation must comply with IMDG international maritime dangerous goods regulations. Avoid high temperature exposure, sunlight irradiation, violent collision and mixing with acidic/oxidizing goods during shipment. We provide complete compliant export documents including MSDS, COA, dangerous goods certification and customs clearance files to guarantee smooth global delivery.
5. Company Introduction & Production Strength
Founded in 2001, our company is a professional high-tech manufacturer and reliable global exporter of silane coupling agents and fine chemical materials in China. We own a standardized modern chemical production base covering 100 acres, equipped with 5 full-automatic professional production lines dedicated to silane series products. With mature and stable production technology, strict quality control system and sufficient daily output, we can flexibly support small trial orders and large-batch full-container orders to meet diversified procurement demands of global industrial customers.
We attach great importance to independent technological R&D and innovation. Professional R&D engineers and senior laboratory testing technicians account for more than 20% of our total employees. Our R&D team focuses on core technical research and upgrading of KH-540 and all series of silane coupling agents, including independent optimization of production processes, development of high-precision product detection and testing methods, formula upgrading of high-purity products, and full-process environmental protection treatment technology for industrial waste gas, wastewater and solid waste, ensuring stable product quality and full environmental compliance.
Our factory has obtained official ISO9001 International Quality Management System Certification and national chemical production license, with complete production qualifications and standardized quality control system. We implement strict raw material incoming inspection, in-process production monitoring and batch finished product testing for every shipment of KH-540, providing high-purity, low-impurity and stable-performance products. With more than 20 years of export experience, our products are exported to Southeast Asia, Middle East, Europe, North America and other global markets, winning long-term trust and recognition from overseas buyers.
6. FAQ
Q1: What is Silane Coupling Agent KH-540?
A1: KH-540 (3-Aminopropyltrimethoxysilane) is a universal high-performance amino-type silane coupling agent. It has dual reactive amino and methoxy hydrolyzable groups, which can tightly bond inorganic fillers and organic polymer materials. It is widely used in fiberglass reinforcement, coating adhesion enhancement, adhesive modification and filler surface treatment industries, serving as one of the most versatile and cost-effective interfacial modifiers in modern industrial composite manufacturing.
Q2: What specifications of KH-540 can you supply?
A2: We mainly supply premium industrial-grade KH-540 silane coupling agent with a purity of ≥98%, stable performance and low impurity content. Customized high-purity special grades are available according to customers’ special industrial formula requirements. For every batch of goods, we can provide complete official documents including MSDS, COA (Certificate of Analysis) and professional test reports to support global customs clearance and quality inspection.
Q3: What are your export trade advantages for global buyers?
A3: We provide buyer-friendly, low-risk and flexible export services for all global partners, with core advantages as follows:
- Multiple flexible payment methods: Support T/T, L/C at sight and other negotiable international payment terms to reduce customer cooperation risks.
- Free sample service: Provide free KH-540 test samples, customers only need to bear the international courier freight.
- Support trial order: Fully accept small-batch trial orders for new customers to test product quality and application effect before bulk cooperation.
- Complete document support: Provide standard English MSDS, batch COA, ISO certification, production license and full set of export clearance documents.
Q4: What is your company’s market positioning and qualification?
A4: We are one of the leading professional manufacturers and bulk suppliers of silane coupling agents in China. We hold valid national chemical production licenses and authoritative ISO9001 international quality certification. Integrating independent R&D, standardized large-scale production and global export sales, we focus on providing high-quality, cost-effective and stable silane coupling agent products for industrial purchasers worldwide.
Q5: Is KH-540 dangerous goods for international sea shipment?
A5: Yes. KH-540 silane coupling agent is classified asClass 8 corrosive liquid dangerous goods, with UN number 2735 and Packing Group III. We have professional dangerous goods packaging, declaration and logistics capabilities to ensure 100% safe, compliant and smooth international sea transportation.
