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Silane USi-3311 – 3-Methacryloxypropylmethyldimethoxysilane
Methacrylate-Functional Dimethoxysilane for Enhanced Adhesion & Crosslinking
CAS No.: 14513-34-9
EINECS No.: 238-518-6
Molecular Weight: 232.35 g/mol
Synonyms:
3-(Dimethoxymethylsilyl)propyl methacrylateSilane USi-3311 is a unique methacrylate-functional silane featuring one polymerizable methacrylate group and two hydrolyzable methoxy groups on a methyl-substituted silicon center. Its tailored structure offers excellent compatibility with acrylic resins, improved hydrolytic stability, and strong adhesion promotion—making it ideal for coatings, adhesives, and reinforced composites.
🧪 Product Description
Chemical Formula: C₉H₁₈O₄Si
Chemical Structure:
![Structure: CH₂=C(CH₃)COO–(CH₂)₃–Si(CH₃)(OCH₃)₂]Unlike conventional trimethoxy analogs (e.g., USi-3301), USi-3311 contains a methyl group directly bonded to silicon, which:
- Reduces crosslink density → improves flexibility
- Enhances hydrolytic stability in formulations
- Lowers volatility and odor
- Maintains reactivity with both organic polymers and inorganic substrates
This balance makes it especially suitable for demanding adhesive and coating applications requiring durability and processability.
📊 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) 1.020 – 1.060 g/cm³ Refractive Index (nD25) 1.4250 – 1.4350 Purity (GC, %) ≥ 97.0%
🏭 Key Applications
🔹 Reinforced Polyester Composites
- Used in glass fiber sizing for unsaturated polyester systems
- Significantly improves dry and wet mechanical strength (e.g., in synthetic marble, panels)
🔹 Adhesives & Coatings Crosslinker
- Crosslinks acrylic-type resins via co-polymerization and silanol condensation
- Enhances adhesion, water resistance, and long-term durability of:
- Industrial coatings
- Pressure-sensitive adhesives (PSAs)
- Structural bonding systems
🔹 Mineral-Filled Composites
- Improves wet electrical properties of composites filled with:
- Silica
- Alumina
- Calcium carbonate
- Critical for electrical encapsulants and insulating materials
🔹 Formulation Advantages
- Better compatibility with low-polarity resins vs. trialkoxy silanes
- Reduced sensitivity to moisture during storage and processing
- Enables more stable single-component systems
📦 Packaging
Available in industrial-grade containers:
- 25 L pail
- 200 L drum
- 1,000 L IBC tote
All packaging ensures moisture protection to preserve product performance.
⚠️ Safety & Storage
- Store in original unopened containers at or below 35°C
- Keep away from heat and open flame
- Shelf Life: 12 months from production date under recommended conditions
- Use appropriate PPE (gloves, goggles) and ensure adequate ventilation
- Consult the latest Safety Data Sheet (SDS) at www.usi-chemical.com or upon request
📞 Contact Us
Nanjing Union Silicon Chemical Co., Ltd.
Your Partner in Advanced Methacryloxy Silane Solutions- 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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