EN
BIIR Bromobutyl Rubber Compound for High-Performance Tire Liners and Medical Closures
Material: BIIR
Hardness: SHA 40A-80A
Color: Customizable
Operating temperature :-60℃ to +130℃
Typical uses: tubeless tires, medical rubber stoppers
Note: We only supply rubber compounds (customizable in hardness, color, and formulation).
- Description
- Applications
- Specifications
- Advantage
- FAQ
- Recommended Products
Description
BIIR(brominated butyl rubber) is a product obtained by brominating and modifying common IIR to enhance its processing and application performance. Based on the excellent air tightness and high damping characteristics of IIR, BIIR introduces active bromine groups. BIIR also boasts outstanding heat resistance, ozone resistance, weather resistance and resistance to a variety of chemicals
Applications
Tubeless tire airtight layer and inner tube
Medical rubber stopper
Chemical-resistant anti-corrosion lining
Rubber parts for vacuum equipment
Shock-absorbing materials, bridge support pads
Specifications
|
Common Name |
Bromo Isobutylene Isoprene Rubber |
|
Hardness(SHA) |
40A~80A |
|
ASTM D-2000 Classification |
BA |
|
Tensile(Mpa) |
≤ 18 |
|
Elongation at Break(%) |
≤ 650 |
|
Compression Set（%） |
≤30 |
|
Temperature Range |
-50℃~+130℃ |
|
Specific Gravity（g/cm³） |
1.15~1.35 |
|
Resistances |
Excellent air tightness |
|
Excellent chemical resistance |
|
|
Excellent shock absorption performance |
|
|
Low permeability and outstanding weather resistance |
|
|
Wide range of vulcanization characteristics |
|
|
Curing Systems |
Sulfur or Peroxide |
|
Production process |
Molding |
|
Extrusion |
|
|
Formula & color |
Custom |
|
Shelf Life |
7-15 days with accelerator, 1-2 years without accelerator |
|
Storage conditions |
Store in a cool and dry place. Keep tightly sealed after opening to avoid moisture absorption and active ingredient failure. |
Advantage
Fast vulcanization speed: The vulcanization activity after bromination is high, and the production efficiency is far superior to that of ordinary IIR.
Better pressure-holding performance: The air tightness is 7 to 8 times higher than that of NR.
Medical-grade cleanliness: Low impurities after halogenation, meeting the cleanliness requirements of high-end medical rubber stoppers
FAQ
Q: Do you sell finished products or raw materials?
A: We only supply rubber compounds, not finished products. You can choose hardness, color, and formulation based on your product needs. We mix to order and deliver.
Q: What rubber types can you handle?
A: Common types include NR, SBR, BR, NBR, EPDM, CR, silicone rubber, fluororubber, etc., subject to actual capability.
Q: Are hardness and formulation linked?
A: No. The same hardness can be achieved with different formulations. The difference lies in tensile strength, tear resistance, compression set, oil resistance, aging resistance, etc. Tell us your application and we’ll recommend the right system.
Q: Can you compound to the customer’s formula?
A: Yes. We support toll processing with customer-supplied materials or mixing to a customer-specified formula. We can also recommend a formula based on performance requirements.
Q: How do you ensure batch-to-batch consistency?
A: Through raw material batch control, fixed mixing process parameters, and sampling tests (hardness, specific gravity, Mooney viscosity, etc.).
