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Silane USi-6301 – n-Propyltrimethoxysilane
Non-Reactive Alkyl Silane for Hybrid Sol-Gel Systems & Controlled Hydrophobicity
CAS No.: 1067-25-0
EINECS No.: 213-926-7
Chemical Name:
n-PropyltrimethoxysilaneSilane USi-6301 is a high-purity non-organoreactive alkyl-functional silane featuring a linear propyl (C₃H₇) chain and three hydrolyzable methoxy groups. Unlike amino, epoxy, or vinyl silanes, it contains no reactive organic functionality—making it ideal for introducing controlled hydrophobicity, flexibility, and organic character into inorganic siloxane networks via sol-gel processes. Often used in combination with n-propyltriethoxysilane to fine-tune network density and hydrolysis kinetics.
🧪 Product Description
Chemical Formula: CH₃(CH₂)₂Si(OCH₃)₃
Chemical Structure:
![Structure: C₃H₇–Si(OCH₃)₃]USi-6301 serves as a molecular modifier in hybrid materials:
- The propyl group imparts mild hydrophobicity and organic compatibility without the extreme water repellency of long-chain analogs (e.g., C8, C18)
- The three methoxy groups enable covalent integration into silica-based networks through hydrolysis and condensation
- Reduces network brittleness and shrinkage in sol-gel coatings, improving adhesion and crack resistance
- Enhances compatibility with organic polymers (e.g., acrylics, epoxies) in hybrid formulations
- Commonly blended with n-propyltriethoxysilane to balance inorganic character (from Si–O–Si bonds) and organic flexibility (from propyl chains)
⚠️ Note: USi-6301 is not a coupling agent for polymer-filler bonding—it is a network modifier for sol-gel and hybrid material design.
📊 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) 0.9330 – 0.9430 g/cm³ Refractive Index (nD25) 1.3860 – 1.3960 Purity (%) ≥ 98.0%
🏭 Key Applications
🔹 Hybrid Organic-Inorganic Coatings via Sol-Gel Process
- Used to formulate scratch-resistant, anti-corrosive, and adhesion-promoting coatings on glass, metal, and ceramics
- The propyl group reduces surface energy slightly while maintaining transparency and hardness
🔹 Tailored Siloxane Network Design
- Adjusts crosslink density, porosity, and mechanical properties of xerogels and aerogels
- Enables fine control over hydrophilicity/hydrophobicity balance for membrane or sensor applications
🔹 Compatibilizer in Polymer-Silica Hybrids
- Improves dispersion of silica nanoparticles in non-polar matrices (e.g., polyolefins) by reducing interfacial tension
- Enhances optical clarity and mechanical toughness in nanocomposites
🔹 Precursor for Functionalized Silica Surfaces
- Serves as a base layer for further chemical modification where mild organic character is desired
- Used in chromatography media, catalyst supports, and controlled-release systems requiring moderate hydrophobicity
📦 Packaging
Available in industrial-grade containers:
- 200 L drum
- 1000 L IBC tote
All packaging is sealed to prevent moisture exposure and preserve reactivity.
⚠️ Safety & Storage
- Store in original unopened containers at ambient temperature
- 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 prolonged 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.
Specialist in Alkyl Silanes for Advanced Sol-Gel & Hybrid Material Formulation- 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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