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Silane USi-81301 – N-Phenyl-3-aminopropyltrimethoxysilane
Secondary Amino-Functional Silane for High-Temperature Adhesion & Reactive Polymer Bonding
CAS No.: 3068-76-6
EINECS No.: 221-328-2
Molecular Weight: 255.39 g/mol
Chemical Name:
N-phenyl-3-aminopropyltrimethoxysilane
Synonyms:
N-[3-(Trimethoxysilyl)propyl]aniline; 3-AnilinopropyltrimethoxysilaneSilane USi-81301 is a unique secondary aromatic amino-functional silane that delivers exceptional adhesion between inorganic substrates (glass, metals, minerals) and polymers that react with secondary amines—such as epoxies, urethanes, acrylates, and phenolics. Its N-phenyl group enhances thermal stability, making it the coupling agent of choice for applications requiring long-term performance at elevated temperatures.
🧪 Product Description
Chemical Structure:
C₆H₅–NH–(CH₂)₃–Si(OCH₃)₃USi-81301 features a strategically engineered molecular architecture:
- The trimethoxysilyl group hydrolyzes to form durable Si–O–substrate bonds with glass, silica, metals, and fillers
- The secondary amine (N–H) is less nucleophilic than primary amines—reducing unwanted side reactions while still enabling controlled co-reaction with:
- Epoxies (ring-opening)
- Isocyanates (urethane formation)
- Acrylates (Michael addition)
- The phenyl ring attached to nitrogen provides:
- Enhanced thermal oxidative stability (>200°C)
- Improved UV resistance
- Better compatibility with aromatic resins
✅ Key Advantage: Combines reactive secondary amine functionality with aromatic thermal stability—ideal for high-performance adhesives, coatings, and composites exposed to heat, humidity, or harsh environments.
📊 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 Yellowish or reddish-brown transparent liquid Specific Gravity (20°C) 1.070 g/cm³ Refractive Index (nD25) 1.4960 – 1.5160 Purity (GC, %) ≥ 95.0% Note: Slight coloration is normal due to the aromatic amine structure and does not affect performance.
🏭 Key Applications
🔹 High-Temperature Adhesives & Sealants
- Promotes durable bonding in structural epoxy adhesives, polyurethane sealants, and RTV silicones
- Maintains adhesion integrity under thermal cycling, engine heat, or industrial processing conditions
🔹 Coatings & Primers for Demanding Environments
- Used in metal primers, anti-corrosion coatings, and high-solids formulations
- Enhances wet adhesion, chemical resistance, and long-term durability on aluminum, steel, and galvanized surfaces
🔹 Glass Fiber Sizing & Composite Finishes
- Improves interfacial strength between glass fibers and high-temperature resins (e.g., bismaleimides, phenolics)
- Critical for aerospace, automotive, and electrical laminates requiring thermal stability
🔹 Foundry Sand Binders
- Added to phenolic or furan resin systems to strengthen sand-core bonding during metal casting
- Withstands high exothermic temperatures without degradation
🔹 Mineral-Filled Polymer Systems
- Coupling agent for silica, talc, clay, and other fillers in engineering plastics and thermosets
- Reduces moisture sensitivity and improves mechanical properties
📦 Packaging
Available in industrial-grade containers:
- 25 kg pail
- 200 kg drum
(Note: Containers are sealed to minimize moisture exposure and preserve reactivity)
⚠️ 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 in well-ventilated areas; wear standard PPE (gloves, goggles)
- 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 Aromatic Aminosilane Technology- 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: inquiry@usichemical.com
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