Electro Plating, High-Purity Solvents

imidazole and epichlorohydrin (IME)

2-Imidazole and epichlorohydrin reaction product, commonly known as IME, is a cationic polymeric surfactant utilized primarily within the electroplating industry as a specialized leveling agent and brightener. This chemical intermediate, identified by CAS number 68794-57-9, results from the polymerization of imidazole and epichlorohydrin, creating a water-soluble quaternary ammonium salt structure. In cyanide and alkaline non-cyanide zinc plating baths, IME functions as a critical additive to ensure uniform metal deposition across various current densities. Its molecular architecture allows it to adsorb onto the cathode surface, effectively suppressing excessive crystal growth and promoting a refined, fine-grained deposit. This leads to high-quality decorative and functional coatings. As a concentrated aqueous solution, IME exhibits high stability across a wide pH range, ensuring consistent performance in industrial electrochemical processes. Its role is indispensable for achieving mirror-like finishes and enhancing the corrosion resistance of plated components in automotive and hardware sectors, serving as a cornerstone of modern surface treatment chemistry.

Attributes

Key Features and Benefits

Superior leveling properties provide exceptional surface smoothness during the zinc electroplating process.
Excellent water solubility ensures rapid dispersion and consistent bath concentration without precipitation.
High chemical stability allows for prolonged operational life in alkaline and cyanide-based electrolyte systems.
Strong adsorption capabilities effectively control metal deposition rates at high current density areas.
Compatible with a wide range of secondary brighteners and carrier agents in complex formulations.
Promotes the formation of dense, uniform, and fine-grained zinc deposits on complex geometries.
Low foaming characteristics improve process control and reduce waste in high-speed plating lines.

Specifications

Technical Highlights

Chemical Name: 1H-Imidazole, polymer with (chloromethyl)oxirane.
Appearance: Typically supplied as a clear, colorless to pale yellow viscous liquid.
Concentration: Standard industrial grades usually range from 35% to 50% active aqueous content.
pH Value: Operates optimally within a broad range, typically maintained between 7.0 and 9.0 in concentrate.
Density: Approximately 1.1 to 1.2 g/cm³ at room temperature conditions.
Molecular Structure: Composed of quaternized imidazole rings linked by hydroxypropyl bridges.
Solubility: Completely miscible in water and compatible with high-alkalinity environments.
Refractive Index: Measured consistently for batch quality assurance and purity monitoring.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Primary leveling agent in alkaline non-cyanide zinc plating for automotive and electronic components.
Essential brightener additive in cyanide zinc plating baths for achieving high-gloss decorative finishes.
Surface treatment for hardware and fasteners to improve uniform coating thickness and corrosion protection.
Additive in alkaline copper plating processes to refine grain structure and improve ductility.
Component in the formulation of specialized metal finishing chemicals for aerospace and industrial machinery.
Electrolyte modifier for precision electroforming applications requiring high dimensional accuracy.
Intermediate in the production of specialized cationic polymers used for industrial wastewater treatment and flocculation.