Polymine (Polyethyleneimine, PEI)
Polymine, also known as Polyethyleneimine (PEI), is a highly cationic, water-soluble polymer synthesized by the polymerization of ethyleneimine. Its molecular structure contains primary, secondary, and tertiary amine groups, giving it high reactivity, strong adsorption ability, and excellent charge neutralization performance. These properties make it widely applicable in surface treatment, papermaking, petroleum, and related industrial fields.
Physical Features
| Performance |
Value or State |
| CAS No. |
9008-98-6 |
| Appearance |
Colorless to pale yellow liquid |
| Viscosity (25 °C) |
500–400,000 mPa·s |
| pH (25 °C) |
10.0–12.0 |
| Total Amine Value |
17.0–20.0 mg/g |
| Assay |
≥ 98.0% |
| Hazen (Color) |
≤ 100 |
| Molecular Weight |
300–70,000 g/mol |
Product Description
Polyethyleneimine is an aqueous polymer with a high density of amine functional groups, resulting in strong cationicity, excellent water solubility, and high chemical reactivity. These characteristics enable PEI to form intermolecular forces such as hydrogen bonds with a wide variety of substrates, making it particularly effective for adhesion enhancement and charge neutralization applications.
Product Application Areas
1. Surface Treatment & Adhesion Enhancement
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Forms hydrogen bonds and electrostatic interactions on the surfaces of:
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Coatings
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Fibers
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Electroplated layers
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Metal substrates
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Significantly improves surface adhesion, especially on substrates that are difficult to bond
2. Papermaking & Paper Processing
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Neutralizes anionic charged materials, improving:
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Fixation efficiency
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Retention rate
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Provides resin control and white water purification
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Promotes the dispersion and fixation of ketene dimers
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When used with other additives, PEI imparts excellent wet strength
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Widely used as a plugging agent in papermaking processes
3. Petroleum Industry
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Used as a plugging agent and functional additive
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Enhances retention, fixation, and dispersion performance in petroleum-related applications
Packaging & Storage
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Packaging: 25 kg plastic drums or user-specified packaging
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Storage conditions:
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Shelf life: 12 months from the date of production under original packaging conditions
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Safety classification: Non-flammable and non-explosive; classified as general dangerous goods
Friendly Reminder
This information is provided true and accurate to the best of our knowledge. However, no responsibility is assumed for any suggestions or statements herein, as conditions and methods of use are beyond our control.
The user is solely responsible for evaluating the product’s suitability, application, and performance for their specific requirements.
