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Silane USi-6103 – N-Decyltrimethoxysilane
Long-Chain Alkyl Silane for Superior Hydrophobization & Inorganic Surface Modification
CAS No.: 5575-48-4
Molecular Weight: 262.46 g/mol
Chemical Name:
N-DecyltrimethoxysilaneSilane USi-6103 is a high-purity long-chain alkyl functional organosilane featuring a hydrophobic C₁₀ (decyl) tail and three hydrolyzable methoxy groups. It chemically bonds to inorganic surfaces—such as glass, silica, alumina, and minerals—to create durable, water-repellent monolayers. Ideal for anti-fogging treatments, heritage conservation, and enhancing filler compatibility in composites.
🧪 Product Description
Chemical Formula: CH₃(CH₂)₉Si(OCH₃)₃
Chemical Structure:
![Structure: C₁₀H₂₁–Si(OCH₃)₃]Unlike short-chain alkyl silanes (e.g., methyl or ethyl), USi-6103’s decyl group (C₁₀) provides:
- Exceptional hydrophobicity and oleophobic character
- Dense molecular packing on surfaces → superior moisture barrier
- Enhanced compatibility with non-polar polymers (e.g., polyolefins, EPDM)
The three methoxy groups enable strong covalent bonding to metal oxides via hydrolysis-condensation, forming a stable Si–O–M linkage that resists washing, UV, and thermal aging.
This dual functionality makes USi-6103 a true coupling agent—bridging inorganic substrates and organic matrices while imparting long-lasting water resistance.
📊 Typical Technical Data
The following values are typical and not intended for specification. Please confirm with our technical team before finalizing product requirements.
Parameter Specification Appearance Colorless transparent liquid Specific Gravity (20°C) 0.895 – 0.905 g/cm³ Refractive Index (nD25) 1.4170 – 1.4270 Purity (GC, %) ≥ 97.0%
🏭 Key Applications
🔹 Waterproofing of Inorganic Materials
- Treats glass, ceramics, mica, talc, kaolin, Al₂O₃, SiC, and silica
- Creates a hydrophobic surface layer that repels water, prevents efflorescence, and inhibits freeze-thaw damage
- Enhances mechanical properties of filled composites by improving interfacial adhesion
🔹 Anti-Fog & Anti-Condensation Coatings for Glass
- Applied to blank glass, optical lenses, coated architectural glass, and precision instruments
- Prevents fog formation by reducing surface energy—water beads up and rolls off
- Compatible with anti-reflective, reflective, and vacuum-deposited coatings
🔹 Conservation of Historical Relics
- Protects outdoor stone monuments, statues, and archaeological artifacts from:
- Water penetration
- Salt efflorescence
- Freeze-thaw spalling
- Biological growth
- Breathable treatment—allows vapor transmission while blocking liquid water
🔹 Filler & Pigment Surface Treatment
- Improves dispersion stability and reduces viscosity in non-polar polymer systems
- Minimizes moisture absorption in mineral-filled compounds
- Enhances impact strength and electrical properties in composites
📦 Packaging
Available in industrial-grade containers:
- 20 kg pail
- 180 kg drum
- 900 kg IBC tote
All packaging is sealed to prevent moisture exposure and maintain reactivity.
⚠️ Safety & Storage
- Store in original unopened containers at or below 35°C
- Keep away from heat and open flame (product is flammable)
- Shelf Life: 12 months from production date under recommended conditions
- Use in well-ventilated areas; avoid skin/eye contact
- Consult the latest Safety Data Sheet (SDS) at www.usi-chemical.com or upon request
📞 Contact Us
Nanjing Union Silicon Chemical Co., Ltd.
Innovator in Specialty Alkyl Silanes for Surface Engineering & Composite Enhancement- Headquarters:
Room 2002, Overseas Chinese Plaza, No.1 Daqiao North Road, Nanjing 210031, Jiangsu, P.R. China - Factory Address:
Dongcheng Guanli District, Gaizhou 115200, Liaoning, P.R. China - Tel: +86-25-5889 5266 / 5889 5699
- Fax: +86-25-5830 5349
- Website: www.usi-chemical.com
- Email: service@usichemical.com
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