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
- 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
- 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
