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USi-1302L — γ-Aminopropyltriethoxysilane
Highly Reactive Trialkoxy Amino Silane for Superior Adhesion, Compatibilization & Moisture Protection
CAS No.: 919-30-2
EINECS No.: 213-048-4
Molecular Weight: 221.37
Synonyms:- 3-Triethoxysilylpropylamine
✅ A fully hydrolyzable trialkoxy amino silane with a primary amine group—offering exceptional reactivity, strong adhesion promotion, and enhanced moisture resistance across a wide range of applications.
📄 Product Description
USi-1302L is characterized by its structure:
H₂N–(CH₂)₃–Si(OCH₂CH₃)₃This unique molecular architecture delivers:
- Primary amine (–NH₂): Reacts readily with epoxies, polyurethanes, acrylics, phenolics, and isocyanates
- Three ethoxy groups: Rapid hydrolysis → quick silanol formation and surface bonding
- Hydrophilic nature: Improves filler dispersion and substrate wetting
Ideal for enhancing adhesion, mechanical properties, and moisture resistance in composites, coatings, adhesives, and foundry resins.
(Chemical structure: H₂N–(CH₂)₃–Si(OCH₂CH₃)₃)
📊 Typical Technical Data
⚠️ Values are typical and for reference only. Not to be used for specification without prior written confirmation from our technical team.
Parameter Specification Appearance Colorless transparent liquid Color (Pt-Co) ≤ 25 Specific Gravity (25°C, g/cm³) 0.940 – 0.950 Refractive Index (nD25) 1.4180 – 1.4220 Purity (GC, %) ≥ 95.0%
🌟 Key Performance Benefits
🔗 Superior Adhesion Promotion
- Enhances adhesion between organic polymers and inorganic substrates (glass, metals, minerals)
- Ideal for use in epoxy adhesives/sealants, phenolic molding compounds, and polyamide composites
- Provides long-lasting bond strength even under humid conditions or thermal cycling
🧱 Improved Mechanical Properties
- Increases flexural strength, tensile strength, and modulus of elasticity in filled systems
- Reduces filler sedimentation tendency during compounding and storage
- Enables higher filler loading without compromising processability
💧 Enhanced Water Resistance & Corrosion Protection
- Forms a hydrophobic barrier at the interface → improves water vapor transmission resistance
- Protects metal substrates from corrosion when used as a primer or additive in paints/coatings
🌀 Efficient Filler Dispersion & Pigment Treatment
- Acts as a coupling agent and dispersant for silica, glass fibers, clay, talc, and pigments
- Reduces agglomeration → smoother finishes, better color consistency, and improved mechanical performance
🏭 Key Applications
🧵 Glass Fiber Composites
- As a finish or size constituent for E-glass fibers in reinforced plastics
- Enhances interfacial bonding, impact resistance, and dimensional stability
- Suitable for wind energy, aerospace, automotive, and construction composites
🧱 Foundry Resins
- Added to phenolic, furan, and melamine resins for:
- Increased green/hot strength of sand cores
- Improved shakeout behavior
- Enhanced humidity resistance during storage
🎨 Paints & Coatings
- Used as an additive and primer to improve:
- Adhesion to glass, metal, and other challenging substrates
- Water resistance and chemical durability
- Uniform pigment distribution and gloss retention
🛠️ Mineral-Filled Polymers & HFFR Cables
- Pretreats fillers/pigments for use in:
- Engineering thermoplastics (PA, PBT)
- Halogen-free flame-retardant (HFFR) cable compounds
- Thermoset resins (epoxy, polyester)
🧽 Insulation Materials & Abrasives
- Added to phenolic resin binders for:
- Mineral fiber insulation
- Grinding wheels and abrasive products
🧰 Adhesives & Sealants
- Used as a primer or additive in:
- Structural adhesives
- Silicone-modified PU sealants
- Chemical modification of polymers
📦 Packaging
- 20 kg HDPE pail
- 190 kg steel drum
- 950 kg IBC tote
(All containers are sealed under nitrogen to prevent premature hydrolysis and contamination)
🛡️ Safety & Storage
- Flammable liquid – keep away from heat, sparks, and open flame
- Store at or below 25°C in a cool, dry, well-ventilated area
- Shelf Life: 12 months from production date in original unopened containers
- Use PPE: nitrile gloves, safety goggles, and adequate ventilation
- Always consult the latest Safety Data Sheet (SDS)
→ Available at: www.usi-chemical.com or upon request
📞 Contact Us
Nanjing Union Silicon Chemical Co., Ltd.
- 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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