Electro Plating, High-Purity Solvents

Polyquaternium-2 (PUB)

Polyquaternium-2, chemically identified as Poly[bis(2-chloroethyl) ether-alt-1,3-bis[3-(dimethylamino)propyl]urea] and registered under CAS number 68555-36-2, is a highly effective cationic polymer extensively utilized in industrial and cosmetic formulations. Functioning as a high-performance conditioning agent and leveling additive, this quaternary ammonium compound is particularly renowned for its exceptional solubility in aqueous systems and its ability to form stable, uniform films on various substrates. In the metallurgical industry, specifically within alkaline and cyanide-free zinc plating processes, Polyquaternium-2 acts as a vital brightener and grain refiner, ensuring superior deposit thickness and surface brilliance. Its cationic nature allows for strong electrostatic interactions with negatively charged surfaces, providing excellent substantivity. This versatile polymer remains stable across a wide pH range, making it indispensable for complex chemical environments. Beyond metal finishing, its structural properties facilitate moisture retention and electrostatic neutralization in specialized personal care products, demonstrating a unique balance of functional efficiency and chemical resilience across diverse industrial applications.

Attributes

Key Features and Benefits

Superior Cationic Substantivity: Provides strong adhesion to negatively charged surfaces for long-lasting effects.
Excellent Leveling Capabilities: Ensures uniform distribution and thickness in electroplating bath applications.
High Water Solubility: Easily integrates into aqueous formulations without requiring complex emulsification steps.
Broad pH Stability: Maintains structural integrity and performance across acidic and highly alkaline environments.
Enhanced Gloss and Brilliance: Significantly improves the aesthetic finish of plated metals and treated fibers.
Low Toxicity Profile: Generally regarded as safe for industrial handling when following standard safety protocols.
Compatibility: Works synergistically with other surfactants and polymers.
Film-Forming: Creates a cohesive barrier that protects substrates effectively.

Specifications

Technical Highlights

Chemical Structure: Urea-based quaternary ammonium polymer with repeating bis(2-chloroethyl) ether units.
Appearance: Typically supplied as a clear to amber viscous liquid for ease of dosing.
Active Content: Often concentrated at 60% or higher to reduce transport costs and storage requirements.
Specific Gravity: Ranges between 1.10 and 1.20, depending on the specific aqueous concentration.
Charge Density: High cationic charge density facilitates rapid surface adsorption and film formation.
Thermal Stability: Exhibits excellent resistance to thermal degradation during high-temperature industrial processing cycles.
Molecular Weight: Optimized to balance penetrative ability with film-forming strength.
Odour: Characterized by a mild, distinctive aromatic scent indicating purity.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Metal Finishing: Acts as a primary brightener and leveling agent in alkaline zinc plating baths.
Electroplating: Crucial additive for cyanide-free zinc electrolytes to refine grain structure and improve luster.
Hair Care: Utilized in specialized shampoos and conditioners for its anti-static and detangling properties.
Textile Processing: Serves as a dyeing auxiliary and finishing agent to improve fabric hand-feel and durability.
Water Treatment: Functions as a flocculant for removing negatively charged organic impurities in industrial wastewater.
Paper Industry: Employed as a retention aid and surface sizing additive to enhance paper strength and printability.
Surface Coatings: Used to modify polymer interfaces manufactured