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Silane USi-7302 – γ-Chloropropyltriethoxysilane
Ethoxy-Based Chloroalkyl Coupling Agent for Halogenated Elastomers & Functional Silanes
CAS No.: 5089-70-3
EINECS No.: 225-805-6
Molecular Weight: 240.80 g/mol
Chemical Name:
γ-Chloropropyltriethoxysilane
Synonyms:
(3-Chloropropyl)triethoxysilaneSilane USi-7302 is a high-purity chloroalkyl-functional silane coupling agent featuring a reactive γ-chloropropyl group and three hydrolyzable ethoxy functionalities. Designed as the ethoxy analog of USi-7301, it offers slower hydrolysis kinetics, improved compatibility with certain polymer systems, and enhanced stability in formulations—making it ideal for coupling inorganic fillers into halogenated rubbers (e.g., neoprene, chlorobutyl, CSM) and as a building block for quaternary ammonium-functional silicones.
🧪 Product Description
Chemical Structure:
Cl–(CH₂)₃–Si(OC₂H₅)₃USi-7302 leverages the dual reactivity of its molecular structure:
- The chlorine atom on the propyl chain enables covalent bonding with halogenated rubber matrices during vulcanization, improving stress transfer and mechanical integrity
- The triethoxysilane group hydrolyzes to form silanols that condense with hydroxylated filler surfaces (silica, clay, CaCO₃), creating strong Si–O–filler bonds
- Compared to methoxy analogs (e.g., USi-7301), the ethoxy groups offer:
- Slower hydrolysis rate → better pot life in moisture-sensitive formulations
- Lower volatility and odor → improved workplace safety and handling
- Enhanced compatibility with ethanol-containing or polar systems
✅ Key Advantage: Delivers the same powerful rubber-filler coupling performance as CPTMO—but with superior formulation stability and user-friendly handling in ethoxy-preferred processes.
📊 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) 1.001 – 1.006 g/cm³ Refractive Index (nD25) 1.4150 – 1.4200 Purity (GC, %) ≥ 98.5%
🏭 Key Applications
🔹 Halogenated Rubber Compounding
- Used in neoprene (CR), chlorinated butyl rubber (CIIR), chlorosulfonated polyethylene (CSM/Hypalon®)
- Significantly improves tensile strength, tear resistance, abrasion resistance, and dynamic fatigue life
- Enhances dispersion of inorganic fillers, reducing compound viscosity and heat build-up
- Enables production of light-color or white rubber products for automotive, construction, and industrial hoses
🔹 Synthesis of Functional Organosilicon Compounds
- Serves as a key intermediate for quaternary ammonium-functional silanes, which exhibit:
- Antimicrobial & mildew-resistant properties
- Deodorizing & disinfecting capabilities
- Antistatic & surfactant-like behavior
- These derivatives are used in textile finishes, building materials, personal care products, and industrial coatings
📦 Packaging
Available in industrial-grade containers:
- 25 L pail
- 200 L drum
- 1000 L IBC tote
All packaging ensures product purity and minimizes moisture exposure.
⚠️ 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 appropriate 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 Global Partner for Advanced Chloroalkyl 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 - Website: www.usi-chemical.com
- Email: inquiry@usichemical.com
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