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Introduction to Medium-Molecular-Weight Polyisobutylene Products (Industrial Grade)
Medium-molecular-weight polyisobutylene is a colorless or slightly yellowish, transparent, semi-solid substance at room temperature. It is non-toxic and odorless, and exhibits excellent chemical stability as well as resistance to heat, ozone, acids, bases, ultraviolet radiation, and weathering. It has a high volume resistivity and a low coefficient of thermal expansion; it contains no dielectric materials and boasts outstanding electrical insulation properties. When heated, it decomposes without leaving any residues, and it demonstrates good compatibility with polyethylene, cycloalkane oils, paraffin wax, petroleum resins, and other substances. It is soluble in organic solvents such as gasoline and benzene, but insoluble in water and alcohol-based solvents.
Release time:
2025-04-21
Medium-molecular-weight polyisobutylene is a colorless or slightly yellowish, transparent, semi-solid substance at room temperature. It is non-toxic and odorless, and exhibits excellent chemical stability as well as resistance to heat, ozone, acids, bases, ultraviolet radiation, and weathering. It has a high volume resistivity, a low coefficient of thermal expansion, contains no dielectric materials, and boasts outstanding electrical insulation properties. When heated, it decomposes without leaving any residues, and it demonstrates good compatibility with polyethylene, cycloalkane oils, paraffin wax, petroleum resins, and other substances. It is soluble in organic solvents such as gasoline and benzene, but insoluble in water and alcohol-based solvents.
Main uses:
1. Sealants: Polyisobutylene’s excellent resistance to atmospheric conditions, aging, and weathering, combined with its vapor-impermeable properties, makes it ideally suited for the production of various sealants and insulating glass sealants. It can also enhance the flexibility and permeability of these products.
II. Rubber Modification: Polyisobutylene boasts excellent aging resistance and plasticizing properties, making it suitable for rubber modification. It is currently widely used in the manufacturing of high-voltage insulating self-adhesive tapes, rubber sealing strips, and other similar products.
3. Paraffin: When polyisobutylene is mixed with paraffin or microcrystalline wax, the resulting blend exhibits enhanced tensile strength and improved product brittleness. This is particularly beneficial for packaging frozen foods, as it imparts greater flexibility and acid resistance to the product.
4. Ink: Polyisobutylene is added to inks as a thickening agent and dispersant. Such inks—including paste-like inks used for printing and rotogravure inks made from polyethylene—benefit from polyisobutylene's viscosity-increasing properties, which help prevent the ink from drying out and cracking during printing.
5. Greases: Adding polyisobutylene to greases can enhance their viscosity and extreme-pressure resistance, particularly in high-temperature greases.
VI. Others: Polymer material modification, tackifying masterbatch for stretch wrap film, damping grease, and more.
