3-Aminopropyltriethoxysilane

Description

1. Product Overview

3-Aminopropyltriethoxysilane (APTES) is a bifunctional organosilane coupling agent featuring a reactive primary amine and three hydrolyzable ethoxy groups. It serves as a critical molecular bridge between organic polymers and inorganic materials, primarily used to enhance adhesion, surface modification, and composite strength. The key value proposition lies in its ability to dramatically improve mechanical properties, moisture resistance, and interfacial bonding in high-performance applications—from fiberglass sizings to advanced coatings. Strategically, APTES is indispensable for industries transitioning to lightweight composites, durable electronics, and next-generation adhesives, making it a linchpin in modern materials science.

2. Key Specifications & Technical Characteristics

• Chemical composition: 3-Aminopropyltriethoxysilane (CAS: 919-30-2); Molecular formula: C₉H₂₃NO₃Si

• Purity level: ≥98% (standard industrial grade); ≥99% available for electronics & pharmaceutical applications

• Physical characteristics:

  • Appearance: Clear, colorless to pale yellow liquid

  • Density (25°C): 0.942 – 0.950 g/cm³

  • Refractive index (n²⁵/D): 1.420 – 1.425

  • Boiling point: 217°C

  • Flash point: 96°C (closed cup)

• Packaging options: 1L, 5L, 25L HDPE drums; 200L steel drums; 1,000L IBC totes

• Shelf life: 12 months when stored in original sealed container under cool, dry, inert gas (N₂) environment

3. Core Industrial Applications

• Composites & Fiberglass: Used as a sizing agent for glass fibers (e.g., in wind turbine blades, automotive panels) to increase flexural strength by 30–50% vs. untreated fibers; outperforms vinyl silanes in humidity cycling.

• Adhesives & Sealants: Added at 0.5–2% by weight to epoxy, polyurethane, and silicone systems to double lap-shear strength on metal and glass substrates; superior to mercapto silanes for long-term hydrolytic stability.

• Coatings & Paints: Applied in anti-corrosion primers for marine and industrial steel structures; improves crosslink density, reducing salt spray failure by >40% compared to titanate alternatives.

• Advanced Materials: Enables covalent immobilization of biomolecules (e.g., antibodies, enzymes) on silica or alumina supports for diagnostic chips and biosensors—unmatched in surface coverage uniformity vs. physical adsorption.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified; each batch tested by GC-FID and Karl Fischer titration; lot-to-lot variance <0.5% purity.

• Supply reliability: Multi-continent production redundancy (Asia, Europe) with 2,000 MT annual capacity; safety stock held in three regional hubs.

• Logistics capability: Hazard-classified shipping (UN 3082, Class 9) with real-time tracking; average lead time 10–15 days to global industrial zones.

• Price competitiveness: Tiered pricing for ≥16 MT reduces landed cost by 8–12% vs. specialty chemical distributors.

• Sustainability: Non-halogenated; low-VOC formulation available upon request; packaging return/recycling program for IBCs.

• Technical support: Full SDS, TDS, and CoA provided; application lab offers custom silanization protocols and HPLC purity confirmation.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 200 kg (equivalent to one 200L drum)

• Bulk 20 MT loading capacity: 80 drums (200L each) = 16,000 kg net weight per standard 20’ container; 20 MT achieved via IBCs (20 x 1,000L = 20,000 kg net) with optimized palletization

• Loading configuration per 20’ container: 20 IBC totes (1,000L each) or 80 drums (200L each) – maximum net weight 21,600 kg subject to density adjustment