Butyl Rubber (IIR, Isobutylene Isoprene Rubber, CAS 9010-85-9) is a versatile synthetic elastomer with superior properties, widely used in multiple industries; 2026 sees stable supply-demand growth, with Tianjin Gnee Biotech Co. Ltd. standing out as a reliable Chinese supplier for global buyers.
butyl rubber properties characteristics
Butyl Rubber (IIR, CAS 9010-85-9) is a saturated synthetic elastomer polymerized from 98% isobutylene and 1-2% isoprene, with ultra-low gas permeability (0.01-0.03 cm³·mm/(m²·d·atm)), tensile strength of 15-25 MPa, and a continuous working temperature of -40℃ to 120℃, making it ideal for sealing and barrier applications. Tianjin Gnee Biotech Co. Ltd., a professional chemical raw material manufacturer founded in 2016, ensures its butyl rubber products fully meet these core properties with strict quality control.
Key Types of Butyl Rubber for Industrial Procurement
Grade Selection Guide for Different Industrial Needs
Industrial buyers focus on three core butyl rubber grades: Standard IIR (unmodified) for general sealing (45% of procurement), Chlorinated IIR (CIIR, 1.1-1.3% chlorine content) for tire inner liners, and Brominated IIR (BIIR, 2% bromine content) for high-performance seals (30% usage). Regenerated butyl rubber cuts material costs by 20-30% for non-critical uses. Tianjin Gnee Biotech Co. Ltd. supplies all three core grades, plus regenerated butyl rubber, covering diverse industrial demands with a full product portfolio.
Butyl Rubber Key Performance Parameters Table
|
Performance Parameter |
Standard IIR (Industrial Grade) |
Chlorinated IIR (CIIR) |
Brominated IIR (BIIR) |
Test Standard |
|---|---|---|---|---|
|
CAS Number |
9010-85-9 |
68441-14-5 |
68084-34-6 |
ASTM D1418 |
|
Tensile Strength |
15-25 MPa |
18-28 MPa |
20-30 MPa |
ASTM D412 |
|
Shore Hardness (Shore A) |
60±5° |
65±5° |
65±5° |
ASTM D2240 |
|
Continuous Working Temperature |
-40℃ to 120℃ |
-35℃ to 125℃ |
-35℃ to 130℃ |
ASTM D865 |
Applications of Butyl Rubber (IIR, CAS 9010-85-9)
Tire Industry
In tire manufacturing, butyl rubber (IIR) is mainly used for producing tire inner tubes. Its excellent air impermeability and heat resistance help improve tire service life and driving safety.
Many well-known tire manufacturers use butyl rubber compounds for tire inner tubes as a key raw material due to its outstanding gas barrier performance and durability.
Sealing Industry
Due to its excellent oil resistance, chemical resistance, and airtight sealing performance, butyl rubber for sealing applications is widely used in gasket and sealing production.
It is especially important in the automotive and aerospace industries, where IIR rubber seals and gaskets are widely used as core sealing materials for long-term reliability under pressure and harsh conditions.
Wire and Cable Sheathing Industry
Butyl rubber has excellent electrical insulation properties and strong aging resistance, making it suitable for butyl rubber cable sheathing materials.
These products are widely used in power transmission systems, telecommunications infrastructure, and transportation cable protection, where long-term stability and insulation safety are required.
Other Applications
In addition to the above industries, butyl rubber (IIR) applications also include gas cylinders, pressure vessels, medical devices, and construction waterproofing materials.
These industries rely on butyl rubber's excellent gas barrier properties, chemical stability, and weather resistance for long-term performance in demanding environments.
Butyl Rubber Supplier (IIR CAS 9010-85-9)-Tianjin Gnee Biotech Co. Ltd.
We supply high-quality Butyl Rubber (IIR, CAS 9010-85-9) for tire manufacturing, sealing systems, construction waterproofing, wire and cable applications, and industrial rubber products.
- Stable Industrial Quality
- Factory Competitive Price
- Global Export Experience
- Technical Documents (COA / MSDS)
- Custom Specifications Available