| Customization: | Available |
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| CAS No.: | 9003-27-4 |
| Formula: | C4h8 |
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Polyisobutylene (PIB) is a polymer made from isobutylene by cationic polymerization. Its molecular weight can range from hundreds to millions. It is a typical saturated linear polymer. The main body of the molecular chain of polyisobutylene does not contain double bonds and long branches. The structural unit is -(CH2-C(CH3)2)-, in which there are no asymmetric carbon atoms, and the structural units are connected in a regular sequence from head to tail.
Physical properties
The appearance of polyisobutylene can be a colorless to light yellow viscous liquid or an elastic rubbery semisolid. Low molecular weight ones are soft and colloid, while high molecular weight ones are tough and elastic. The density is 0.92 g/mL (25/4ºC), and the flash point is between 110~263ºC. Polyisobutylene is soluble in benzene and diisobutylene, and is miscible with polyvinyl acetate, wax, etc., but is insoluble in polar solvents such as water and alcohol.
Application areas
Polyisobutylene has a wide range of applications:
Lubricant additives: improve the performance of lubricants.
Adhesives: With good adhesion and elasticity, it can be used to make pressure-sensitive adhesives, sealants, etc. Wires and cables: Used to make the insulation layer of wires and cables to improve the insulation performance of wires. Plasticizers: Used as plasticizers for plastics to improve the processing performance and flexibility of plastics. Rubber products: Used for rubber modification to improve the aging resistance and plasticity of rubber. Coatings and inks: Acts as a thickener and dispersant in coatings and inks.
| Item | Quality Index |
| Product Name | Polyisobutene/Pib/Poly(Isobutylene) |
| Purity | ≥99% |
| CAS NO | 9003-27-4 |
| EINECS No. | 618-360-8 |
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Appearance
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Colorless transparent
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| Flash Point (º C) | 110~263 |
| Application | Polyisobutylene has good light resistance, heat resistance, and oxidation resistance. |
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