Polyisobutylene succinimide (PIBSI) is a synthetic polymer used primarily as a surfactant and dispersant in a variety of industries.
In industrial applications, it helps suspend dirt and other insoluble particles, decreasing the surface tension between liquids and solids.
It is also used as an emulsifier, stabilizer, corrosion inhibitor, and dispersant in the formulation of various lubricants, fuels, and water-based fluids.
It used to improve the strength and durability of products such as adhesives, sealants, oils, greases.
It is also used to reduce friction and wear, reduce corrosive byproducts, improve environmental compatibility, and reduce costs.
PIBSI also provides excellent water resistance and toughness, making it ideal for use in automotive, construction, marine, and other industrial applications.
Properties of Pibsi
Pibsi has the following physical and chemical properties:
Molecular weight: The molecular weight of Pibsi is usually between 1000 and 5000, and the molecular weight distribution depends on the production process and raw materials.
Melting point: The melting point of Pibsi is usually around 250°C, and its melt flow behavior is suitable for a variety of processing and molding processes.
Viscosity: The viscosity of Pibsi increases with increasing molecular weight. At room temperature, its viscosity is usually between 10-3 and 10-4 Pa·s.
Isotacticity: Pibsi’s isotacticity refers to the degree of orderly arrangement of structural units along the molecular chain. The higher the isotacticity, the better its performance is usually.
Preparation method of Pibsi
The preparation of Pibsi mainly involves the selection of raw materials, production technology and processes. Following are the brief steps to prepare Pibsi:
Choose the right raw materials: The main raw materials include isobutylene, alumina and catalysts.
Polymerization reaction: Under the action of a catalyst, isobutylene polymerizes to form polyisobutylene.
Chlorination and quaternization reaction: Polyisobutylene reacts with chlorinating agent to form chlorinated polyisobutylene, which then reacts with amine to form quaternary ammonium salt.
Dehydration reaction: Quaternary ammonium salt undergoes dehydration reaction at high temperature to generate Pibsi.
Product processing: After cooling, crushing and packaging processes, the final Pibsi product is obtained.