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USi-1311 — γ-Aminopropylmethyldimethoxysilane
A Fast-Reactive, Monomethyl Amino Silane for High-Strength Adhesion & Functional Silicone Synthesis
CAS No.: 3663-44-3
EINECS No.: 222-919-8
Molecular Weight: 163.29
Synonyms:- 3-(Dimethoxymethylsilyl)propylamine
- 3-(Dimethoxymethylsilyl)propan-1-amine
✅ Combines a primary amine, two methoxy groups, and a non-hydrolyzable methyl group—delivering rapid coupling, excellent substrate wetting, and enhanced moisture resistance in adhesives, composites, and functional silicones.
📄 Product Description
USi-1311 is a monofunctional aminoalkoxysilane with the structure:
H₂N–(CH₂)₃–Si(CH₃)(OCH₃)₂This molecular design offers a strategic balance:
- Primary amine (–NH₂): Reacts readily with epoxies, polyamides, phenolics, acrylics, and isocyanates
- Dimethoxy groups: Hydrolyze faster than ethoxy analogs → quicker silanol formation and surface bonding
- Methyl group: Limits crosslink density → improves flexibility, compatibility, and storage stability vs. trialkoxy silanes
Ideal for applications demanding fast adhesion development, superior wet-state mechanical properties, and efficient pigment/filler dispersion.
📊 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 Specific Gravity (20°C) 0.9490 – 0.9530 g/cm³ Refractive Index (nD20) 1.4260 – 1.4300 Purity (GC, %) ≥ 94.6%
🌟 Key Performance Benefits
⚡ Rapid Coupling & Enhanced Wet Strength
- Significantly boosts dry and wet bending, compressive, and shear strength in:
- Epoxy laminates
- Polyamide (PA6/PA66) composites
- Phenolic molding compounds
- Maintains electrical insulation properties under humid conditions
🔗 Superior Adhesion to Diverse Substrates
- Promotes strong bonding to:
- Glass, aluminum, steel, iron, and mineral surfaces
- Effective in epoxy, nitrile rubber, phenolic, and acrylic latex adhesives/sealants
🎨 Improved Pigment & Filler Dispersion
- Acts as a compatibilizer and dispersant in coatings and filled polymers
- Reduces agglomeration → smoother finishes, higher loading capacity, better color consistency
🧪 Enhanced Foundry & Insulation Performance
- In phenolic resin-bonded sand cores:
- Increases green/hot strength
- Improves anti-wetting behavior during metal casting
- In glass/mineral wool production:
- Boosts moisture resistance
- Enhances compression recovery and resilience
🧴 Building Block for Amino Silicones & Latex
- Used to synthesize amino-functional silicone oils for softening agents
- Compatible with acrylic and polyamide latex systems for textile and coating applications
🏭 Key Applications
Industry Application Adhesives & Sealants Epoxy, nitrile, and phenolic formulations requiring durable adhesion to metals/glass—even after humidity exposure Composite Materials Glass-fiber-reinforced PA, PBT, epoxy, and polyester—improves interfacial strength and moisture resistance Coatings Water-based acrylic/epoxy latex paints—enhances pigment dispersion and substrate wetting Foundry Cold-box phenolic resins for high-strength, dimensionally stable sand molds Insulation Materials Binder additive in glass/mineral wool for improved hydrophobicity and elastic recovery Functional Silicones Intermediate for amino-modified PDMS used in personal care and textile finishing
📦 Packaging
- 25 L HDPE pail
- 200 L steel drum
- 1000 L IBC tote
(All containers are nitrogen-purged to minimize moisture and CO₂ exposure)
🛡️ Safety & Storage
- Flammable liquid – keep away from heat, sparks, and open flame
- Store at ambient temperature in a cool, dry, well-ventilated area
- Shelf Life: 12 months from production date in original unopened containers
- Primary amines may absorb atmospheric CO₂ over time—slight cloudiness may occur but typically does not affect performance
- 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: service@usichemical.com
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