EN
IIR Butyl Rubber Compound for High Gas-Tight Seals
Material: IIR (Butyl Rubber)
Hardness: 30A-90A
Color: Customizable
Service temperature: -60°C to +130°C
Typical applications: Tire inner tubes, vacuum seals, vibration damping mounts, medical stoppers
- Description
- Applications
- Specifications
- Advantage
- Recommended Products
Description
IIR (Butyl Rubber) is a synthetic rubber copolymerized from is obutylene with a small amount of isoprene. Its main chain is highly saturated with tightly packed molecular chains, resulting in gas permeability that is only one-tenth that of natural rubber. In addition, IIR also offers excellent ozone resistance, weather resistance, acid/alkali resistance, and extremely high
damping/vibration isolation performance.
Applications
Tubeless tire inner liners and inner tubes
Vacuum system sealing rings and diaphragms
High-voltage insulated cable sheathing
Medical stoppers and vial seals
Soundproofing and vibration-damping pads for mechanical equipment
Specifications
|
Common Name |
Isobutylene Isoprene Rubber |
|
Hardness(SHA) |
30A~90A |
|
ASTM D-2000 Classification |
BA |
|
Tensile(Mpa) |
7~18 |
|
Elongation at Break(%) |
250~800 |
|
Compression Set (100℃×22h，%) |
≤25 |
|
Temperature Range |
-40℃~+120℃ |
|
Specific Gravity（g/cm³） |
0.91~0.93 |
|
Resistances |
Excellent air tightness |
|
|
Excellent chemical resistance |
|
|
Excellent shock absorption and ozone resistance |
|
|
Excellent electrical insulation property |
|
Curing Systems |
Sulfur / peroxide |
|
Production process |
Molding |
|
|
Extrusion |
|
Formula & color |
Custom |
|
Shelf Life |
5–7 days with accelerator, 1 -2year without accelerator. |
|
Storage conditions |
Store in a cool, dry place. After opening, seal tightly to prevent moisture absorption and loss of active ingredients |
Advantage
Ultra-low gas permeability
Superior damping performance: High damping characteristics enable effective absorption and isolation of mechanical vibrations
Excellent aging and chemical resistance: Outstanding ozone and weather resistance without the need for special additives
Chemical resistance: Resistant to dilute acids, alkalis, animal/vegetable oils, and polar chemical solvents
