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USi-401S18 — Pre-Catalyzed Vinyl Silane Compound
One-Step Crosslinking Solution for High-Performance Polyethylene Cables
Chemical Composition:
Vinyltrimethoxysilane (VTMS) + Proprietary Catalyst System✅ A ready-to-use, pre-catalyzed silane blend engineered to enable fast, efficient moisture crosslinking of polyethylene—ideal for power cable insulation and jacketing.
📄 Product Description
USi-401S18 is a homogeneous liquid formulation combining high-purity vinyltrimethoxysilane (VTMS) with a tailored catalyst system, eliminating the need for separate catalyst addition during compounding.
This “one-step” solution delivers:
- Accelerated crosslinking kinetics – significantly reduces post-extrusion steam or hot-water curing time
- Uniform crosslink density – enhances mechanical and electrical consistency
- Improved process efficiency – simplifies production, reduces risk of catalyst dispersion issues
Designed specifically for the wire & cable industry, USi-401S18 transforms standard polyethylene (PE) or ethylene copolymers into silane-crosslinked PE (PE-Xb) with superior performance.
(Note: Exact catalyst type is proprietary; formulation optimized for stability and reactivity balance)
📊 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 to pale yellow liquid Density (20°C) 0.9660 – 0.9760 g/cm³ Viscosity (20°C) ~0.8 mPa·s (near water-like)
⚡ Key Performance Benefits in Cable Applications
When incorporated into polyethylene compounds, USi-401S18 enables the production of PE-Xb cables with:
- ✅ Faster crosslinking – cuts curing time by up to 30–50% vs. conventional two-step systems
- ✅ Enhanced mechanical properties:
- Higher tensile and impact strength
- Superior resistance to cracking and tearing
- ✅ Excellent environmental durability:
- Resistant to aging, UV, heat, and chemicals
- Maintains flexibility over wide temperature ranges
- ✅ Improved electrical insulation performance – stable dielectric properties even under thermal stress
Ideal for low-, medium-, and high-voltage power cables, building wiring, and automotive cables.
🏭 How It Works: One-Step Silane Grafting & Crosslinking
- Extrusion: USi-401S18 is melt-blended with PE resin (e.g., LDPE, LLDPE) during extrusion
- Grafting: VTMS grafts onto polymer chains via free-radical reaction (aided by peroxide, if used)
- Crosslinking: After extrusion, exposure to moisture (steam/hot water) triggers hydrolysis and condensation → 3D network formation
- Result: Thermoset-like PE-Xb with thermoplastic processability
💡 The built-in catalyst ensures rapid and complete crosslinking without operator-dependent dosing.
📦 Packaging
- 210 L Iron Drum: 180 kg/drum
- 1000 L IBC Container: 900 kg/IBC
(Containers are sealed, nitrogen-purged, and labeled for industrial handling)
🛡️ Safety & Storage
- Flammable liquid – keep away from heat, sparks, and open flame
- Store at ≤ 35°C in a cool, dry, well-ventilated area
- Shelf Life: 12 months from production date in original unopened 200L drums
- Always review the latest Safety Data Sheet (SDS) before use
→ Available at: www.usi-chemical.com or upon request - Use appropriate PPE: nitrile gloves, safety goggles, and ventilation
📞 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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