Chlorosulfonated Polyethylene (CSM)/ Hypalon
Chlorosulfonated Polyethylene (CSM): Hypalon® Replacement for Demanding Applications
Chlorosulfonated Polyethylene (CSM) is a high-performance halogenated synthetic rubber originally developed by DuPont and commercialized as Hypalon®. Known for its durability, weather resistance, and chemical stability, Hypalon® was widely used across automotive, marine, military, and construction industries.
In 2010, DuPont officially discontinued Hypalon® production due to environmental concerns and corporate restructuring. To fill the global supply gap, YQXPOLYMER developed its own CSM line—offering full-grade replacements with enhanced formulation stability and global technical support.
🏭 Our Capabilities:
- 🏗 Production capacity: 5,000 MT/year
- 🔬 Fully in-house chlorosulfonation R&D
- 🔧 Grades available from Mooney 30–110, Cl 25–43%
- 📦 Formats: raw gum, pre-compounded, or thermoplastic sheet
- 🌍 Global delivery with TDS, REACH, RoHS documentation
⚙️ Key Advantages of YQXPOLYMER CSM
- ✅ Excellent ozone, UV, and weather resistance
- ✅ Strong acid, alkali, oil, and solvent resistance
- ✅ Good flame retardancy (UL 94 HB or V-0 with compounding)
- ✅ Compatible with ZnO, MgO, sulfur, or peroxide curing
- ✅ Grades available for thermoplastic or vulcanized use
🧪 CSM Grades – Technical Specifications, Hypalon® Alternatives & Applications
Grade | Cl (%) | S (%) | Volatile (%) | Tensile (MPa) | Elongation (%) | Mooney Viscosity (ML1+4, 100°C) | Hypalon® Equivalent | Typical Applications |
CSM-403 | 35±2 | 1.0–1.5 | ≤0.5 | ≥25 | ≥450 | 40–50 | Hypalon® 40 | General molded goods |
CSM-503 | 35±2 | 1.0–1.5 | ≤0.5 | ≥25 | ≥450 | 50–60 | Hypalon® 40S | Flexible hose covers, cable sheathing |
CSM-603 | 35±2 | 1.0–1.5 | ≤0.5 | ≥25 | ≥450 | 60–70 | Hypalon® 45 | Fuel hoses, brake tubing |
CSM-703 | 35±2 | 1.0–1.5 | ≤0.5 | ≥25 | ≥450 | 70–80 | Hypalon® 45 | Chemical gaskets, pipes |
CSM-803 | 35±2 | 1.0–1.5 | ≤0.5 | ≥25 | ≥450 | 85–95 | Hypalon® 60 | Tank linings, stiff rubber sheets |
CSM-903 | 35±2 | 1.0–1.5 | ≤0.5 | ≥25 | ≥450 | 95–110 | Hypalon® 85 | Diaphragms, vibration dampers |
CSM-604 | 43±2 | 1.0–1.5 | ≤0.5 | — | — | 50–70 | Hypalon® 4022 | Solvent-resistant coatings |
CSM-48 | 43±2 | 1.0–1.5 | ≤0.5 | — | — | 70–90 | Hypalon® 4055 | Flame-retardant jacketing |
CSM-45 | 25±2 | 1.0–1.5 | ≤0.5 | — | — | 35–45 | Hypalon® TP | Thermoplastic liners, membranes |
CSM-301H | 43±2 | 1.0–1.5 | ≤0.5 | — | — | 1000–2000 mPa·s* | Hypalon® 4022 | Adhesives, solvent rubbers |
CSM-301L | 43±2 | 1.0–1.5 | ≤0.5 | — | — | 400–600 mPa·s* | Hypalon® 20 | Spray-grade coatings |
CSM-20 | 30±2 | 1.3–1.7 | ≤0.5 | — | — | 30–40 | Hypalon® 29 | Blending-grade, low-temp rubbers |
CSM-HV40 | 35±2 | 1.0–1.5 | ≤0.5 | — | — | 45–50 | Hypalon® 30 | Industrial seals, molded parts |
CSM-HV50 | 35±2 | 1.0–1.5 | ≤0.5 | — | — | 55–60 | Hypalon® 55 | Oil-resistant linings |
*CSM-301H and CSM-301L measured as 25% toluene solution viscosity at 25°C.
🧭 Hypalon® to YQXPOLYMER CSM Migration Guide
Original Hypalon® Grade | ✅ Suggested CSM Grade |
Hypalon® 40 | CSM-403 |
Hypalon® 40S | CSM-503 |
Hypalon® 45 | CSM-603 / CSM-703 |
Hypalon® 60 | CSM-803 |
Hypalon® 85 | CSM-903 |
Hypalon® 4022 | CSM-604 / CSM-301H |
Hypalon® 4055 | CSM-48 |
Hypalon® TP | CSM-45 |
Hypalon® 20 | CSM-301L |
Hypalon® 29 | CSM-20 |
Hypalon® 30 | CSM-HV40 |
Hypalon® 55 | CSM-HV50 |
🏭 Industry Applications
- 🚗 Automotive: Fuel hoses, vibration damping, brake lines
- 🧪 Chemical: Acid tanks, anti-corrosion lining, gaskets
- ⚡ Power & Cable: UV/flame-resistant jacketing
- 🌊 Marine: Inflatable boats, wet environment rubber
- 🏗 Construction: Waterproof membranes, coatings
- 🧵 Adhesives/Coatings: Spray rubbers, contact adhesives
🙋 Frequently Asked Questions (FAQ)
❓ Why did DuPont discontinue Hypalon®?
DuPont ended production in 2010 due to restructuring and regulatory issues with halogenated materials.
❓ Is YQXPOLYMER CSM chemically equivalent to Hypalon®?
Yes. All grades are chlorosulfonated polyethylene and matched in Mooney viscosity, chlorine %, and performance.
❓ What curing systems can I use?
ZnO, MgO, sulfur, or organic peroxide—depending on the application.
❓ Can CSM be used outdoors?
Yes. It has top-level resistance to UV, ozone, and weathering.
❓ Operating temperature?
−40°C to +150°C (short-term up to 160°C).
❓ Do you offer uncured or thermoplastic CSM?
Yes. CSM-301H, CSM-301L, and CSM-45 are solvent-grade or thermoplastic options.
❓ Packaging?
25kg kraft bags or 500–1000kg jumbo bags. Customizable.
❓ Compliance?
✅ RoHS
✅ REACH
✅ Halogen-controlled
Certificates available.
❓ Can you help with formulations?
Yes. Our team offers compounding and process guidance.
❓ MOQ & Lead Time?
MOQ: 1 MT. Lead time: 7–14 working days. Global delivery available.
🧱 About YQXPOLYMER
YQXPOLYMER is a performance Polymer and Modified Epoxy Resin manufacturer in China. We specialize in:
- Chlorosulfonated Polyethylene (CSM)
- Modified Epoxy Resins
- Functional Elastomers
📬 Email: sales@yqxpolymer.com
📞 Tel/ WeChat: +86-135-4070-2776
🌐 Website: www.yqxpolymer.com
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