Polyisobutylene pib

Selecting the right PIB depends primarily on Molecular Weight (MW). Low Molecular Weight PIB (LMW-PIB), typically between 700 and 2,500 g/mol, is a liquid used mainly for lubricant additives, fuel detergents, and sealants. High Molecular Weight PIB (HMW-PIB), exceeding 40,000 g/mol, is a rubber-like solid used for adhesives, roofing membranes, and tire inner liners. Buyers must specify the Kinematic Viscosity (measured at 100°C) and Polydispersity Index (PDI) to ensure the material matches their production machinery.

Critical quality metrics include Color (APHA), which should be near-water white for high-end cosmetics or food-grade applications, and Flash Point, which is vital for safety in lubricant blending. For Highly Reactive PIB (HR-PIB), the alpha-olefin content must be above 80% to ensure efficient chemical synthesis. Always request a Certificate of Analysis (COA) that verifies the moisture content is below 50 ppm to prevent interference with downstream chemical reactions.

For food-related packaging or cosmetics, ensure the supplier provides FDA 21 CFR 177.1430 compliance or REACH registration for the European market. If the PIB is used in medical applications, USP Class VI certification is required. Additionally, verify that the manufacturer follows ISO 9001:2015 for quality management and ISO 14001 for environmental standards, especially regarding the handling of isobutylene monomers.

PIB acts as a Viscosity Index Improver (VII). High-quality PIB maintains a stable viscosity across a wide temperature range, preventing the oil from becoming too thin at high temperatures or too thick at low temperatures. Buyers should look for shear stability data; if the PIB chains break down under mechanical stress, the lubricant will lose its protective properties prematurely.

While PIB is generally classified as non-hazardous, liquid grades are highly viscous and can be difficult to discharge in cold climates. For bulk shipments, use ISO Tanks with heating coils or Flexitanks to facilitate unloading. Ensure the Material Safety Data Sheet (MSDS) is provided in the language of the destination country to comply with GHS (Globally Harmonized System) labeling requirements.

Utilize the secured payment services on Made-in-China.com to protect your funds until the goods are shipped. It is highly recommended to commission a third-party inspection (such as SGS or Intertek) to perform a Loading Survey and verify that the batch numbers on the drums match the COA provided by the factory. This prevents the common risk of receiving 'off-spec' or industrial-grade material when premium grade was ordered.

PIB pricing is heavily influenced by the price of crude oil and C4 feedstock. To secure better rates, consider long-term supply contracts rather than spot-buying, as manufacturers offer significant discounts (often 5-10%) for consistent monthly volumes. Negotiate based on Incoterms 2020, preferring FOB or CIF terms to clearly define where the risk transfers from the seller to the buyer.

Verify the HS Code (typically 3902.2000) with your local customs broker to determine applicable import duties. Be aware of anti-dumping duties that may apply to specific origins. Ensure all documentation, including the Commercial Invoice, Packing List, and Bill of Lading, accurately reflects the chemical description to avoid costly delays or seizures during customs inspections.