Factory Supply POLYETHYLENEIMINE CAS 9002-98-6 with Best Price

  • Appearance: Colorless liquid
  • Purity: 99. 0%min
  • Stock: In stock
  • Sample: Available
  • Zhishang Chemical: POLYETHYLENEIMINE Supplier Manufacturer



Polyethyleneimine is a colorless, highly viscous liquid. Soluble in water, ethanol, hygroscopic, insoluble in benzene, acetone. Any encounter with sulfuric acid with a pH below 2.4 will cause precipitation. The aqueous solution is positively charged, and the addition of formaldehyde produces coagulation.

Polyethylenimine (PEI) is divided into two types: linear and branched. Linear polyethyleneimine contains all secondary amines, while branched polyethyleneimine contains primary, secondary and tertiary amine groups. . Linear polyethyleneimine of any molecular weight is solid at room temperature, while branched polyethyleneimine is liquid. Linear PEI is soluble in hot water or low pH methanol, ethanol or chloroform, but insoluble in cold water, benzene, ether and acetone; one end of the polymer chain is a methyl group and the other end is an amino group; the melting point is 73-75°C ; can be stored at room temperature.

Polyethyleneimine (PEI) or polyaziridine is a polymer with repeating device, which is made up of amine group and 2 fatty carbon CH2 CH2 spacer groups. Linear polyethyleneimine contains all second amines, while branched Pei includes main, secondary as well as tertiary amino teams. A fully branched dendritic kind is likewise reported. [1] Pei is generated on an industrial range and has discovered that many applications come typically from its polycation homes.


  1. Polyethyleneimine used as a wet strength agent for unsized breathable paper, a retention aid and a beating agent in the papermaking process to reduce the beating degree of the pulp. Improve paper dewatering ability. Increase the dryness of the paper by 1% to 4%. Production capacity increased by 5% to 20%.
  2. High adhesion and adsorption
    Amino groups can respond with carboxyl groups to create hydrogen bonds. Amino groups can react with carboxyl teams to form ionic bonds. Amino teams can react with carbonyl teams to create covalent bonds.Polyethyleneimine can combine with different substances due to its polar group (amino group) and hydrophobic group (vinyl group) structure. Using these comprehensive binding forces, it can be widely used in the fields of adhesives, inks, coatings, adhesives, etc.
  3. Highly cationic
    Polyethyleneimine exists as a polymeric cation in water, which can neutralize and adsorb all anionic species, and can also chelate heavy metal ions. Using its high cationic residential or commercial properties, it can be made use of in the fields of papermaking water treatment, electroplating solution, as well as dispersant.
  4. Sensitivity
    Polyethyleneimine reacts easily with epoxy, acids, isocyanate compounds as well as acid gases as a result of its highly reactive primary as well as additional amines. Making the most of this residential property, it can be utilized as epoxy material reactant, aldehyde adsorbent and dye fixer. Polyethyleneimine has several applications in the complying with items: cleaning agents, adhesives, water therapy agents and also cosmetics.
  5. Due to the fact that it can modify the surface area of cellulose fiber, Polyethyleneimine is made use of as wet strength representative in papermaking procedure. It can likewise be made use of as a flocculant with silica sol and also a chelating agent with the ability to complex steel ions such as zinc and zirconium.

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This is William, CEO of Zhishang Chemical Co., Ltd.

Welcome to visit our factory . As the top chemical manufacturer, we have been striving for product quality, innovation , R&D, and customer service for the past 7 years. In the next 10 years or even longer, we are committed to becoming the most reliable chemical supplier in the world , creating a well-known international brand trusted by customers, with the spirit of “one meter wide, ten thousand meters deep”, we continue to focus on product research and development, continue to focus on customer service, continue to improve the supply chain service system, to create a professional chemical supply service team, to achieve win-win long-term cooperation. Please feel free to contact us if you have any questions.

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Preparation of ethyleneimine
300kg of ethanolamine and 50kg of water were added to the reaction pot, and 50kg of concentrated sulfuric acid was slowly added dropwise under stirring, and the temperature was controlled at 10 to 30° C. when the sulfuric acid was added dropwise. After dripping, keep stirring for 1h. Continue to heat up to 50°C, and dehydrate under reduced pressure until crystals are precipitated. The vacuum distillation was stopped. Cool and crystallize and filter. The filter cake was washed with a small amount of water and dried to obtain aminoethanol hydrogen sulfate.

Transfer it to the hydrolysis kettle, add 200kg of 30% NaOH aqueous solution, and steam the azeotrope of ethyleneimine and water after hydrolysis at 100°C.

The ethyleneimine aqueous solution prepared above is added to the polymerization kettle, hydrogen chloride and carbon dioxide are introduced, and the vinylimine is polymerized under acid catalysis to obtain polyethyleneimine.


  1. Aziridine – PubChem
  2. Davidson, Robert L.; Sittig, Marshall (1968). Water-soluble resins. Reinhold Book Corp. ISBN 978-0278916135.
  3. Madkour, Tarek M. (1999). Polymer Data Handbook. Oxford University Press, Inc. p. 490. ISBN 978-0195107890.

Polyethyleneimine Supplier and Manufacturer

As a polyethyleneimine supplier and manufacturer with strict standard product quality system certificate, Zhishang Chemical has long been providing the best polyethyleneimine raw materials to customers all over the world.

Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.

If you have demand for polyethyleneimine and related products, please contact our service staff Zhishang Chemical – White directly, we will provide you with high-quality products at the best price.


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