Polyethylenimine CAS 25987-06-8

PEI and its derivatives are used in water treatment and gas purification as flocculants, heavy metal adsorbents, and for the removal of surfactants; in the paper industry as process aids and drainage enhancers;
in the fiber industry as wet strength agents, antistatic treatments, flame retardants, shrinkage inhibitors, and dyeing improvers; in coatings, inks, and adhesives (including heat-sealable plastics) to promote adhesion, improve creep resistance, enhance pigment and filler dispersion, prevent aggregation, and improve coating stability;
in cosmetics to improve hair quality, provide antibacterial properties, and soften skin;
in oil exploration and deep well operations to prevent fluid loss, reduce viscosity, prevent paraffin deposition, and improve clay stability;
in the medical and pharmaceutical fields, it can improve the compatibility of artificial organs with blood and is also used as a coating for medical devices;
Additionally, it is a component of ion exchange resins and membranes, a resin crosslinking agent, a crystallization aid, an electroplating brightener, a metal rust inhibitor, a gasoline and diesel fuel combustion improver, a lubricating oil additive, a glass cleaning agent, a liquid chromatography stationary phase, and a polymer catalyst, and is also used in synthetic enzyme model research.