⚙️ YQXPOLYMER CSM Rubber Formulation & Processing Guide
Mastering Chlorosulfonated Polyethylene (CSM) for High-Performance Industrial Applications
Chlorosulfonated Polyethylene (CSM), known for its superior chemical resistance, weatherability, and aging performance, is a key elastomer used across wire & cable, automotive seals, construction membranes, and industrial linings. At YQXPOLYMER, we’ve compiled decades of technical expertise into a comprehensive formulation and processing guide to help formulators and engineers unlock the full potential of our next-generation CSM grades.

🔍 Key Performance Attributes of YQXPOLYMER CSM
Ozone and UV Resistance: Suitable for long-term outdoor and marine applications
Chemical Resistance: Outstanding against acids, alkalis, and oxidizing agents
Thermal Stability: Continuous service temperatures from -40 °C to +150 °C
Flame Retardance: Halogen-based backbone contributes to self-extinguishing properties
Adhesion Compatibility: Excellent bonding with metals, fabrics, and other rubbers

🧪 Mooney Viscosity Selection Guide
Choosing the right Mooney viscosity (ML 1+4 @ 100 °C) grade impacts processing and final performance:
Mooney Grade Application Characteristics
40–50 Coating & Thin-walled Products Low viscosity, easy processing
60–80 General Molding & Extrusion Balanced flow & strength
90–100+ High-Strength Industrial Parts High green strength, dimensional stability
🛠 Recommendation: Preheat compounds for smoother mixing and use semi-reinforcing fillers for better control.

🔧 Crosslinking System Matching
1. Peroxide Curing:
Pros: Excellent heat resistance, cleaner decomposition
Suitable For: Wire & cable, automotive hoses
Notes: Use co-agents (e.g., TMPTMA, TAC) to boost crosslink density
2. Metal Oxide Curing (e.g., MgO, PbO):
Pros: Fast cure rates, good balance of properties
Suitable For: Chemical liners, flame-retardant compounds
Notes: Monitor curing temperature to prevent scorching

📘 Common Formulation Examples
Component Example A (Cable Jacket) Example B (Gasket)
CSM Rubber 100 phr 100 phr
MgO 5 phr 4 phr
Stearic Acid 1 phr 1 phr
Carbon Black (HAF) 40 phr 60 phr
Plasticizer (e.g., DOA) 10 phr 5 phr
Peroxide (DCP) 2 phr —
Curing Additives 3 phr (co-agent) 2 phr (accelerator)
🧪 Tip: Adjust filler ratios to control hardness and rebound resilience.

🏭 Processing Tips for Compounders
Pre-Blending: Mix plasticizer and filler first to avoid CSM scorching
Cooling: Ensure compound is cooled before storage to retain processability
Mixing Temperature: Keep below 100 °C during compounding
Final Cure: Optimize press temperature (160–180 °C) and time per part geometry

🧩 End-Use Applications Enhanced by CSM
Automotive weather seals and hoses
Flame-retardant cable sheathing
Industrial linings and tank seals
Construction waterproof membranes
Defense and aerospace fuel-resistant seals

🌐 Why Choose YQXPOLYMER CSM?
YQXPOLYMER delivers consistent quality, competitive pricing, and expert technical support. Our capacity exceeds 5,000 MT annually, with a full range of Mooney viscosities and formulation assistance.
📞 Contact our application engineers at:
📬 [email protected]
📱 +86-135-4070-2776
🌐 www.yqxpolymer.com

Need a custom CSM compound or tailored formulation?
👉 Explore CSM Product Grades
👉 Request Technical Data Sheets