Product Series
Request A Quote
Get Your Customized Equipment Quote in 24 Hours – Global Solutions, Local Support.
Product Details
- 产品描述
-
Silane USi-8201 – Diphenyldimethoxysilane
Phenyl-Functional Alkoxysilane for Polypropylene Catalysts & High-Stability Silicones
CAS No.: 6843-66-9
EINECS No.: 229-929-1
Molecular Weight: 244.36 g/mol
Chemical Name:
Diphenyldimethoxysilane
Synonyms:
Dimethoxydiphenylsilane, DDSSilane USi-8201 is a high-purity diaryl dialkoxysilane that serves as a critical internal electron donor in high-efficiency Ziegler-Natta catalyst systems for polypropylene production—and as a key monomer for phenyl silicone oils with exceptional thermal and oxidative stability. With ≥98% GC purity, it ensures consistent polymer stereoregularity, isotacticity control, and catalyst performance in demanding industrial processes.
🧪 Product Description
Chemical Structure:
(C₆H₅)₂Si(OCH₃)₂USi-8201 combines the benefits of two phenyl groups and hydrolytically stable methoxy functionality:
- The dual phenyl rings provide steric bulk and electronic effects that precisely modulate Ti active sites in MgCl₂-supported catalysts—boosting isotactic index and hydrogen response
- Unlike chlorosilanes, the methoxy groups are non-corrosive, easier to handle, and compatible with standard catalyst preparation protocols
- Also used as a building block for phenyl-containing silicone fluids, offering superior thermal stability, radiation resistance, and low-temperature flexibility vs. alkyl silicones
✅ Key Advantage: The go-to non-halogenated internal donor for modern high-yield, high-isotacticity polypropylene catalysts—bridging petrochemical catalysis and advanced silicone synthesis.
📊 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) 1.073 – 1.083 g/cm³ Refractive Index (nD25) 1.5350 – 1.5450 Purity (GC, %) ≥ 98.0%
🏭 Key Applications
🔹 Polypropylene Catalyst System
- Acts as an internal electron donor in MgCl₂/TiCl₄-based Ziegler-Natta catalysts
- Significantly improves:
- Isotacticity of polypropylene (reducing atactic byproducts)
- Catalyst activity and morphology control
- Hydrogen sensitivity for precise MFI (melt flow index) tuning
- Preferred over phthalate donors in phthalate-free PP formulations for food contact, medical, and automotive applications
🔹 Phenyl Silicone Oil Synthesis
- Serves as a starting material for producing diphenyl silicone oils and methylphenyl polysiloxanes
- Resulting silicones exhibit:
- Excellent thermal stability (>250°C)
- Low volatility and high flash point
- Good radiation resistance—ideal for aerospace, nuclear, and LED encapsulation
🔹 Hydrophobic Additive & Surface Modifier
- Can be blended into other silane coupling agent systems to enhance water repellency and surface durability
- Used in hydrophobic treatments for glass, minerals, and pigments where long-term stability is required
📦 Packaging
Available in moisture-resistant industrial containers:
- 25 L pail
- 200 L drum
- 1000 L IBC tote
All packaging is designed to minimize moisture exposure and maintain product integrity.
⚠️ 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
- Although non-corrosive, 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 Trusted Supplier of High-Purity Phenyl Alkoxysilanes- 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
Keywords:
Previous Page
Next Page
Related products
Request A Quote
Get Your Customized Equipment Quote in 24 Hours – Global Solutions, Local Support.
Phone/WhatsApp:
Email:
HUATAO GROUP
Leave Message
If you have any queries about us or our product(s), feel free to drop us a message.
