Chloroprene Rubber CAS 9010-98-4

Introduction to Chloroprene Rubber

Chloroprene Rubber is produced via emulsion polymerization of 2-chloro-1,3-butadiene. Chlorine atoms along the polymer backbone deliver a unique property set that sits between general-purpose diene rubbers and high-performance polar elastomers. The material carries inherent self-extinguishing properties, strong outdoor durability and reliable adhesion to metals and fabrics.

Solid CR undergoes cold crystallization when stored below 10 °C, leading to temporary stiffening. The effect reverses fully when the material returns to room temperature with no permanent loss of flexibility or mechanical properties. Optimal storage conditions preserve consistent viscosity and processing behavior over the full shelf life.

Chemical & Physical Properties of Chloroprene Rubber

Applications of Chloroprene Rubber

Automotive & Industrial Rubber Goods
Extruded and molded into timing belts, radiator hoses and heavy-duty conveyor belts for mining and material handling. Its heat resistance and inherent flame retardancy support long service life in high-temperature engine compartments and harsh industrial environments.

Wire & Cable Jacketing
Used as the outer sheath for power cables, marine cables and mining cables. It delivers abrasion resistance, weatherproofing and self-extinguishing performance that meets strict electrical safety codes for infrastructure and underground installations.

Solvent-Based Contact Adhesives
Dissolved in aromatic and chlorinated solvent blends with tackifying resins to produce heavy-duty contact cements. It bonds strongly to rubber, metal, wood and fabric, serving footwear, furniture laminate and automotive interior assembly markets.

Construction & Civil Engineering
Formulated into bridge bearing pads, architectural expansion joint seals and roofing membranes. Its long-term weatherability and resistance to environmental stress cracking deliver decades of reliable structural performance in exterior applications.

Storage & Safety Precautions for Chloroprene Rubber

• Store in a dry, well-ventilated warehouse at 15–25 °C. Avoid prolonged exposure below 10 °C to prevent cold crystallization, and keep away from direct sunlight to prevent surface degradation. Shelf life reaches 12–18 months under proper conditions.
• Ensure adequate local exhaust ventilation during compounding, milling and extrusion operations to control rubber dust and processing fumes. Wear standard safety gloves and eye protection during all handling activities.
• Transport in standard dry van or sea containers. Use heated containers for winter shipments to destinations with sub-freezing temperatures. Verify Mooney viscosity upon receipt to confirm grade specification.

Chloroprene Rubber FAQ

Q: How does Chloroprene Rubber compare to NBR for oil service?

A: NBR handles aromatic and heavy oils better for fuel seals. CR offers moderate oil resistance but far superior ozone, weather and flame performance for outdoor and fire-safe applications.

Q: Why do CR blocks harden during cold winter transit?

A: Cold crystallization occurs below 10 °C. The effect is fully reversible. Warm blocks to 25 °C for 48 hours before processing to restore original flexibility and viscosity.

Q: What makes Chloroprene Rubber suitable for cable jacketing?

A: It combines inherent flame retardancy, abrasion resistance and weather stability. These properties meet strict electrical safety codes for power, mining and marine cable outer sheaths.