Polyisobutylene (PIB, CAS 9003-27-4) is a widely used synthetic polymer in many industrial applications, including adhesives, lubricants, sealants, fuel additives, and rubber modification. It has become an important raw material in modern manufacturing.
At Tianjin Gnee Biotech Co., Ltd., we supply bulk polyisobutylene (PIB) to global customers, with strict quality control and flexible delivery options to support different industrial needs.
What is Polyisobutylene (PIB)?
Polyisobutylene (PIB) is a synthetic hydrocarbon polymer produced by the polymerization of isobutylene monomers. It is a colorless or light yellow viscous liquid or rubber-like solid depending on molecular weight.
Polyisobutylene (PIB) Advantages
- Excellent chemical resistance
- Strong air and moisture barrier properties
- High elasticity and flexibility
- Good thermal stability
Polyisobutylene (PIB) Chemical and Physical Properties
| Property | Description |
|---|---|
| Chemical Name | Polyisobutylene |
| CAS Number | 9003-27-4 |
| Molecular Formula | (C4H8)n |
| Appearance | Colorless to light yellow viscous liquid / rubber-like solid |
| Molecular Weight Range | Low / Medium / High molecular weight grades |
| Density | ~0.91–0.93 g/cm³ |
| Solubility | Insoluble in water, soluble in hydrocarbons |
| Odor | Mild hydrocarbon odor |
| Thermal Stability | Excellent |
| Chemical Resistance | Strong resistance to acids, alkalis, and oxidation |
| Permeability | Very low gas and moisture permeability |
To learn about the hazards of polyisobutylene (CAS 9003-27-4), please click here.
Polyisobutylene (PIB) Grades
|
Grade |
Molecular Weight |
Properties |
|
Low molecular weight (LMW) |
Less than 65,000 |
Semi-liquid to soft resinous consistency; used mainly as tackifiers |
|
Medium molecular weight (MMW) |
40,000 - 85,000 |
Soft resinous consistency; used as base polymers and additives in adhesives and sealants |
|
High molecular weight (HWM) |
85,000 - 4,000,000 |
Soft resinous to rubbery consistency; used as base polymers for adhesives and sealants |
- Low molecular weight polyisobutylene (LMW PIB) is mainly used to produce low molecular weight ashless dispersants and prepare two-stroke oil.
- Medium molecular weight polyisobutylene (MMW PIB) is mainly used as electrical insulation materials, adhesives, sealants, etc., as well as polymer blending modifiers.
- High molecular weight polyisobutylene (HMW PIB) is mainly used in rubber modification, cable insulation materials, and high-performance sealing systems due to its excellent elasticity and durability.
Industrial Applications of Polyisobutylene (PIB)
PIB for Adhesives and Sealants
PIB is widely used in adhesives and sealants due to its strong tackiness, flexibility, and long-term stability.
PIB for Lubricants and Fuel Additives
PIB is used as a viscosity index improver, lubricant additive, and fuel detergent component, helping improve engine performance and reduce wear.
PIB for Rubber and Polymer Modification
PIB enhances elasticity, aging resistance, and waterproof properties, making it suitable for various industrial rubber applications.
PIB for Industrial Sealing Applications
Due to its low permeability, PIB is widely used in construction sealants, automotive sealing systems, and waterproof membranes.
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Why Choose Tianjin Gnee Biotech Co., Ltd. Manufacturer?
As a professional Polyisobutylene (PIB) manufacturer in China, Tianjin Gnee Biotech Co., Ltd. focuses on providing stable and high-quality polymer raw materials for global industrial customers.
Choosing us means working directly with a manufacturer, not a middle trader, which helps ensure better control over quality, price, and delivery time.
Key Advantages of Our PIB Supply
Tianjin Gnee Biotech Co., Ltd. provides consistent product quality with strict production control to ensure every batch meets industrial standards. We maintain stable supply capacity to support long-term and bulk procurement needs, helping customers avoid production interruptions. Our team offers technical support to help clients choose the right PIB grade for different applications such as adhesives, lubricants, and sealants. We also provide flexible packaging and logistics solutions to support global shipping requirements and reduce procurement risk.
Conclusion
If you are looking for bulk Polyisobutylene (PIB, CAS 9003-27-4) and want a reliable China manufacturer and supplier, Tianjin Gnee Biotech Co., Ltd. is a dependable choice.
We help global buyers reduce procurement risks, and ensure consistent product performance through reliable PIB supply solutions.