Polyethyleneimine

Description

1. Product Overview

Polyethyleneimine is a high-molecular-weight, water-soluble cationic polymer available in linear and branched architectures. It serves as a primary performance additive in adhesives, coatings, paper wet-strength resins, and heavy-metal chelation for industrial wastewater treatment. The key value proposition is its exceptionally high charge density per unit mass, enabling lower dosage rates and faster reaction kinetics compared to alternative polyamines or inorganic coagulants. Strategically, PEI is critical for industries tightening discharge regulations and improving bonding durability in composite manufacturing.

2. Key Specifications & Technical Characteristics

• Chemical composition: Branched or linear polyethyleneimine (C₂H₅N)ₙ, typical Mw 600–750,000 g/mol

• Purity: ≥99% active polymer content; industrial grade (up to 50% aqueous solution) and high-purity (≥99.9% solids)

• Physical form: Clear to light-yellow viscous liquid or free-flowing solid flakes (anhydrous)

• Density: ~1.05–1.10 g/mL (50% solution); bulk solids ~0.85 g/cm³

• Viscosity (25°C): 500–50,000 cP depending on molecular weight and concentration

• Packaging options: 200 kg HDPE drums, 1,000 kg IBC totes, bulk flexitanks (20 MT), and custom moisture-barrier bags for solid form

• Shelf life: 24 months when stored below 40°C in sealed, dry conditions; avoid CO₂ absorption

3. Core Industrial Applications

• Water & wastewater treatment: Primary coagulant aid and heavy-metal chelator (Cu²⁺, Ni²⁺, Zn²⁺). Outperforms inorganic salts by working across a wider pH range (4–11) and producing 40% less sludge volume.

• Adhesives & papermaking: Wet-strength resin for tissue, packaging, and filter paper. Achieves 30% higher wet tensile retention than PAE resins at same dosing.

• Biomedical & pharma: Gene transfection agent and protein immobilization substrate. Branched PEI provides higher transfection efficiency than liposomal alternatives.

• Textile & coatings: Anti-static agent and crosslinker for epoxy or polyurethane coatings. Improves adhesion to low-energy surfaces (polyolefins) where traditional primers fail.

4. Competitive Advantages

• Quality consistency: Batch-to-batch polydispersity index <1.3; full GPC and titration QC reports included.

• Supply reliability: Dedicated production lines with 5,000 MT annual capacity; safety stock held in three regional hubs (Americas, EMEA, Asia-Pacific).

• Logistics capability: Export-certified packaging for sea, air, and rail; hazardous goods (Class 8) documentation pre-cleared.

• Price competitiveness: Tiered pricing for ≥20 MT bulk orders, beating European and Chinese spot averages by 8–12% on annual contracts.

• Sustainability: Branched grades contain up to 35% bio-based ethylene amine content; zero VOC in solid form.

• Technical support: Free application lab testing (zeta potential, dose optimization) within 72 hours of sample request.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 1 MT (solution) or 500 kg (solid flakes) for initial trial; standard commercial MOQ 5 MT

• BULK 20MT Loading capacity:
  20 MT per 20′ dry container (IBC totes or drums – 20 pallets × 1,000 kg net)
  20 MT per flexitank inside 20′ container (liquid solution)
  18–20 MT per 20′ container (solid flakes, palletized, 25 kg bags)