Polybutadiene Rubber — a high-cis synthetic rubber with exceptional elasticity and dynamic performance. Reliance Relflex Cisamer grade, manufactured at Hazira.
PBR’s high-cis structure delivers unmatched resilience, crack resistance, and low rolling resistance — making it the essential performance ingredient in tyre compounds and technical rubber goods.
Highest rebound elasticity among synthetic rubbers. PBR quickly returns to its original shape after deformation — critical for tyre performance and bounce applications.
Reduces energy loss during tyre rotation, directly improving vehicle fuel efficiency. A key performance attribute for modern fuel-efficient and EV tyre designs.
Excellent resistance to flex cracking and fatigue. PBR compounds maintain integrity under millions of dynamic stress cycles in tyre sidewalls and industrial belts.
Glass transition temperature near −100°C delivers outstanding cold-weather performance. Compounds remain flexible in sub-zero operating conditions.
Blends readily with NR, SBR, and other rubbers to achieve targeted performance profiles. The go-to performance booster in multi-rubber compound formulations.
Minimal heat generation under dynamic stress. Prevents performance degradation and premature failure in high-speed tyre and conveyor belt applications.
Truck and bus radial tyres, passenger car tyres, and high-performance tyre compounds. PBR improves wear life and fuel efficiency simultaneously.
Conveyor belts, industrial hoses, vibration mounts, and moulded components requiring high resilience and fatigue resistance.
High-impact polystyrene (HIPS) and ABS modification. PBR improves impact strength in engineering plastics and protective equipment.
Golf ball cores, shoe soles, and sports equipment. PBR’s exceptional bounce and resilience make it the material of choice for high-performance sports goods.
Core specifications for PBR (Cisamer grade). For full technical data — see the Technical Data Sheet.
| Polymer Type | High-Cis Polybutadiene (Nd-catalysed) |
| Cis-1,4 Content | ≥ 96% |
| Mooney Viscosity | 40 – 50 ML (1+4) @ 100°C |
| Specific Gravity | 0.91 |
| Tensile Strength | 15 – 18 MPa (compounded) |
| Glass Transition Temp | −100°C |
PBR processes on standard rubber compounding equipment. Typically blended at 20–50% with NR or SBR. Compatible with carbon black, silica, and process oils.
Store in a cool, dry warehouse away from direct sunlight and heat sources. Keep bales in original Reliance packaging on pallets. Shelf life: 12 months from manufacture.
Get competitive pricing, blending recommendations, and fast dispatch from our Reliance-approved stocking points across Telangana & AP.