Polybutadiene Rubber
A high-resilience elastomer — blended into tyre tread for low rolling resistance, moulded into golf ball cores, and used as an impact modifier.
Chelora Chemicals supplies high-cis polybutadiene rubber in bale form to tyre, sporting-goods and polymer-modification producers worldwide.
Product identity
- CAS Number
- 9003-17-2
- Polymer type
- Homopolymer (1,3-butadiene)
- Cis-1,4 content
- ~96% (high-cis grade); varies by catalyst system
- Density
- 0.91 g/cm³
- Glass transition (Tg)
- ~-100 to -95 °C
- Form supplied
- Baled solid rubber
- UN Number
- Not regulated
- HS Code
- 4002 20
Note: High-cis and low-cis grades differ significantly in resilience and processing behaviour; confirm your target grade with our technical desk.
What PBR is used for
Polybutadiene Rubber (BR) is a high-resilience elastomeric homopolymer of 1,3-butadiene, produced mainly by solution polymerisation using Ziegler-Natta, nickel, cobalt or neodymium catalyst systems that give high cis-1,4 microstructure content, the configuration responsible for BR's hallmark low heat build-up and high rebound resilience.
BR's largest use is blended with natural rubber or SBR in tyre tread and sidewall compounds, where its low rolling resistance and good low-temperature flexibility improve fuel economy and wet/winter traction. It is also moulded into golf ball cores for its high resilience and energy return, and used as an impact modifier grafted into ABS and high-impact polystyrene.
Where it sits in the petrochemical value chain
- 1,3-Butadiene the sole monomer, polymerised into polybutadiene rubber. See that page.
- Polybutadiene Rubber (this product) the resilient elastomer for tyre blends, golf balls and impact-modifier uses.
- Styrene-Butadiene Rubber often blended with BR in tyre compounds. See that page.
Handling character
BR bale rubber is not classified as hazardous under normal handling, though it is a combustible solid and should be stored away from ignition sources. Full handling detail is in the Safety section below.
| Parameter | Typical value |
|---|---|
| Appearance | Light tan to amber baled solid rubber |
| Cis-1,4 content | ~96% (high-cis); other grades available |
| Mooney viscosity (ML 1+4, 100°C) | Grade dependent, confirmed at order |
| Bale weight | ~33-35 kg (typical) |
Important: the figures above are indicative of commercial material and are offered for planning only. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical state | Solid, baled elastomer |
| Glass transition (Tg) | -100 to -95 °C |
| Density | 0.91 g/cm³ |
| Resilience | High — a key reason for tyre and golf-ball use |
| Low-temperature flexibility | Excellent |
| Flammability | Combustible solid |
Physical constants compiled from public reference data for CAS 9003-17-2 and rounded for readability. Treat them as orientation, not as a specification.
Where our customers put PBR to work
The resilient rubber behind low-rolling-resistance tyres, golf balls and impact-modified plastics.
Tyre tread & sidewall blends
Blended with natural rubber or SBR to lower rolling resistance and improve low-temperature flexibility.
- Tyre-grade specification
- Bale & container-load supply
- Technical desk review on request
Golf ball cores
Moulded into high-resilience cores for two- and three-piece golf balls.
- Sporting-goods grade specification
- Documented batch traceability
- Contract & spot supply
ABS / HIPS impact modifier
Grafted into ABS and high-impact polystyrene to improve impact resistance.
- Full analytical documentation available
- Retained sample held against the lot
Mechanical rubber goods
Compounded into belts, hoses and other mechanical rubber goods requiring resilience.
- Documented batch traceability
- Technical desk review on request
Polymer modification blends
Used as a flexibilising and impact-enhancing blend component in various thermoplastic compounds.
- Research & process-scale quantities
- Full documentation supplied
Contract & scheduled supply
Tyre and polymer-modification plants running continuous consumption are supported with scheduled bulk delivery.
- Annual contracts with scheduled call-off
- Price held across the contract period
- Second source held in reserve
How we supply Polybutadiene Rubber
Chelora Chemicals is a supplier and sourcing partner, not a manufacturer. Cis-1,4 content and Mooney viscosity consistency are critical to tyre-compound and golf-ball performance — that shapes how we manage this line.
We place your order with whichever qualified producer best matches your required grade, your price point and your delivery window, and confirm your jurisdiction's import requirements before booking.
We keep a second qualified source on this line, so a single-plant disruption never becomes your production problem.
- Cis-1,4 content and Mooney viscosity confirmed before we quote. Consistency matters to downstream tyre, golf-ball and impact-modifier performance.
- High-cis and other grades both sourced. Matched precisely to your tyre-blend or impact-modifier specification.
- Scheduled call-off scheduling. We hold contracted tonnage and release it against your consumption calendar.
- Batch traceability to the producing plant. Full chain of custody documentation on request.
- Export machinery handled in-house. Classification, approved packing, labelling, freight booking and customs paperwork are ours to manage.
- Container-load and bulk bale logistics managed. Palletised bale shipments arranged to your receiving dock requirements.
Packed the way your plant receives it
Palletised bales or container-load shipment — tell us your preferred format and we will quote and arrange it.
~33-35 kg bales
Film-wrapped bales, palletised, for smaller-volume orders and trial quantities.
~1,000-1,200 kg pallets
Shrink-wrapped pallets of bales sized for mid-volume converter orders.
Full container loads
Full container-load bale shipment for continuous-consumption tyre and polymer-modification plants.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to, with documentation filed before booking.
Trial / sample quantities
Small packs dispatched for process trials before a commercial order is placed.
Contracted call-off supply
We hold contracted tonnage and release it against your consumption calendar.
Non-hazardous solid rubber — handle sensibly
Baled polybutadiene rubber is not classified as hazardous under GHS for normal handling, but it is combustible and processing fumes should be managed with adequate ventilation. The summary below is orientation only — the safety data sheet supplied with your specific batch is the authoritative document.
Classified hazards
Not classifiedBaled rubber is not classified as hazardous under GHS.Processing noteProcessing fumes (compounding, curing) should be managed with adequate ventilation per equipment guidance.
Store away from ignition sources. Baled rubber is combustible; avoid prolonged exposure to direct sunlight and ozone, which can degrade physical properties over time. Always read the SDS issued with your specific batch.
Storage
Store baled rubber in a cool, dry, covered area away from direct sunlight, ozone sources and ignition sources to preserve physical properties.
Handling
Standard PPE is sufficient for normal bale handling. Ensure adequate ventilation during compounding and curing operations where fumes may be generated.
Transport
Not classified as dangerous goods for transport in bale form. We confirm any destination-specific import documentation your shipment requires.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Cis-1,4 content, Mooney viscosity and grade confirmed against your process requirement before order placement.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS and transport paperwork checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
How PBR is made
Polybutadiene rubber is produced industrially by solution polymerisation of 1,3-butadiene using Ziegler-Natta (titanium, cobalt, nickel) or neodymium-based catalyst systems, each giving different cis-1,4/trans-1,4/vinyl microstructure ratios; high-cis catalyst systems are preferred for maximum resilience and minimum heat build-up in tyre and golf-ball applications. The polymer is coagulated, dried and baled for shipment.
We do not publish operating process parameters here; this is background only. Full technical documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Polymer family | Diene elastomer (homopolymer) |
|---|---|
| Production route | Solution polymerisation with Ziegler-Natta, nickel, cobalt or neodymium catalysts |
| Key properties | High resilience, low heat build-up, excellent low-temperature flexibility |
| Related compounds | 1,3-Butadiene (monomer), Styrene-Butadiene Rubber (related elastomer) |
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Polybutadiene Rubber, answered
What is Polybutadiene Rubber used for?
How is Polybutadiene Rubber made?
Is Polybutadiene Rubber hazardous?
What grade do you supply?
What packing do you offer?
Do you manufacture this yourself?
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