Medium Moleculare Weight Polyisobutylene
Medium molecular weight polyisobutylen (PIB) is a synthetic hydrocarbon. It is formed by polymerizastion of isobutene. It is a transparent, semi-solid polymer. It's average molecular weight ranges between 40,000 and 120,000 g/mol. Medium molecular weight polyisobutylene is employed as viscosity modifier, tack improver in adhesive formulations, and primary binder in caulking and sealing compounds.
Product advantages
The isobutene which is the main raw material for the polyisobutylene produced by ourself, and the purity of isobutene reaches 99.99%.
We have the full range of PIB grade, with all industrial grade and food and pharmaceutical grade products.
The medium molecular process has a high degree of automation, and the molecular weight distribution and solvent residue indicators have reached the world's leading level.
Application of the product
Viscosity modifier, tack improver in adhesive formulations, and primary binder in caulking and sealing compounds.
It is also used in fuel and lubricating oil additives. It is extensively used as a protective barrier in the adhesive industry hermoplastic Spacers, double glazing sealants, photovoltaic sealants, automotive sealants, hotmelt butyl tape, compound sealing spacer for IG, adhesives, lubricant grease, shield grease, wrapping film, anticorrosion materials, damping materials, insulating materials, cable oils, roofing, rubber modifiers, wax modifiers, asphalt modifiers, photovoltaic sealants, insulating materials, etc.



Performance characteristics
Moderate viscosity
Its molecular weight is between high molecular weight and low molecular weight polyisobutylene, so it has moderate viscosity, which gives it unique advantages in some specific application fields.
Good flexibility
The structure of the molecular chain gives medium molecular weight polyisobutylene good flexibility, enabling it to maintain good physical properties under different environmental conditions and not easy to crack or harden.
Good adhesion
It has good adhesion to a variety of materials and can firmly adhere to the surface of objects to form a stable adhesion layer.
Chemical corrosion resistance
Due to the saturation of the molecular chain, it has a certain resistance to chemical substances such as acids, alkalis, and salts, and can maintain stable performance in some occasions with more complex chemical environments.

Company profile
Zhejiang Cenway Materials Co., Ltd. was established in July 2008 in Jiaxing Port District China Chemical New Materials (Jiaxing) Park.Cenway is a new material enterprise integrating R &D, production and sales , incubated by Tsinghua Industrial Development Research Institute.
Cenway has two factories in Zhejiang and Liaoning provinces, and is the only company in the world that can simultaneously produce full grades of polyisobutylene and butyl rubber.
Based on the C4 industry chain, Cenway adheres to the customer value-driven innovation concept, focuses on technological progress, and is determined to become a supplier of new material products and solutions for high-growth industries.
FAQ
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Medium Molecular Weight Polyisobutylene, Poly Iso Butene, Polyisobutene



