High molecular weight PIB (Polyisobutylene, CAS 9003-27-4) is a specialized form of PIB, distinguished by its long molecular chains. Regular PIB comes in various molecular weights, but high molecular weight PIB has chains that are much longer, giving it unique properties and uses.
Physically, it's often a rubbery solid at room temperature, unlike lower molecular weight PIBs that can be more liquid - like. It's colorless, odorless, and insoluble in water, but readily dissolves in many organic solvents. Chemically, its long chains make it highly resistant to oxidation, wear, and chemicals, which are key advantages.
One of the main benefits of high molecular weight Polyisobutene is its excellent elasticity and durability. In the automotive industry, it's used in making gaskets and seals. These parts need to withstand high pressures, extreme temperatures, and various chemicals, and high molecular weight PIB's properties make it perfect for the job.

In the construction field, it's added to sealants. It helps sealants maintain their flexibility over time, preventing cracks from forming due to temperature changes or building movement. This ensures a long - lasting seal, keeping out water, air, and dust.
So, what does High Molecular Weight PIB do?
This material is commonly used in:
- Sealants and adhesives: Because of its tacky and flexible nature, it's perfect for products that need to seal gaps or stick materials together.
- Cable insulation and waterproofing: Polyisobutylene provides excellent moisture resistance and flexibility.
- Cling films and stretch wraps: It helps create films that can stretch and stick, commonly used in packaging.
- Tyre inner liners and automotive products: Poly(Isobutylene) improves air retention and durability.
We export PIB all year round, can ensure that the product quality guarantee to customers.We provide Commerical Invoice, Packing List, Bill of loading, COA.Are you interested in this product? Please submit an inquiry, and we will contact you within 24 business hours to discuss your requirements.

Why choose Gneebio?
Gneebio is a professional chemical raw material manufacturer and global distributor. Our company is located in Henan Province, China. We have multiple partner chemical factories in Henan, covering an area of 3,600 square meters, providing customers with a one-stop chemical procurement service, including mixing, repackaging, storage, and distribution.
Our hot-selling products include aromatic hydrocarbons (Naphtha (petroleum), Benzene, Toluene, o-Xylene, Styrene, Cyclohexane, Cyclohexanone, Epsilon-Caprolactam, 2-Anilinoethanol, etc.), alcohols (Ethylene Glycol, 1-Butanol, 2-Methyl-1-Propanol, Ethyl Alcohol, etc.), phenols and ketones (Phenol, Propafenone, Bisphenol A, Phenyl Methacrylate, Methyl Isobutyl Ketone, Phenolic Resin, etc.), and petrochemicals.We hope to establish long-term and mutually beneficial cooperation with more friends in the future and provide the best products and services for our customers.
Advantages
1). Small batch shipment and sub-packaging is available.
2). Provide COA, MSDS, Health Certificate and Origin Certificate.
3). Quality first, service best.
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