Universal Wetting Dispersant Solvent-based Car Paint High-Filler Intermediate Coatings EFKA4010

Anjeka 6402 Polyurethane Dispersant

Product Overview

Anjeka 6402 is a solution of polyurethane copolymer modified with acidic groups, specifically designed for pigment dispersion in solvent-borne and solvent-free coating and printing ink systems. It delivers effective steric stabilization for both inorganic and organic pigments, making it a versatile dispersant choice for medium and low polarity resin systems.

Key Benefits

Fine Particle Size Distribution
Anjeka 6402 employs steric stabilization to achieve effective pigment dispersion, leading to the formation of small, uniform particle sizes. This finer distribution is the foundation for improved coating performance across multiple quality parameters.

Enhanced Gloss Levels
Better pigment dispersion translates directly to higher gloss in the final coating. Anjeka 6402 helps formulations achieve smoother, more reflective surfaces across a range of coating types.

Improved Color Strength
Smaller, more uniform pigment particles deliver stronger, more vibrant color expression. Formulations using Anjeka 6402 show notably improved color strength compared to undispersed or poorly dispersed systems.

Improved Transparency for Transparent Pigments
For transparent pigment systems, Anjeka 6402 enhances clarity and transparency, allowing the true optical properties of the pigments to come through without haze or cloudiness.

Enhanced Hiding Power for Opaque Pigments
In opaque systems, the improved dispersion enhances hiding power, meaning better coverage per coat and more efficient use of pigments.

Reduced Millbase Viscosity
Anjeka 6402 significantly reduces millbase viscosity during dispersion. This improves flow characteristics, making processing easier and allowing for higher pigment loading capacity without sacrificing application properties.

Minimized Haze in Electrostatic Applications
For inorganic pigmented coatings processed through electrostatic high rotation technique, Anjeka 6402 effectively minimizes haze, delivering cleaner, more consistent color appearance.

Application Areas

Anjeka 6402 is recommended for:

Coatings

• Solvent-borne coatings
• Solvent-free coatings
• Medium and low polarity resin systems

Printing Inks

• Solvent-borne ink systems
• Solvent-free ink systems

Ideal For

• Titanium dioxide stabilization
• Inorganic pigment systems
• Anionic and acid-catalyzed systems, including coil coatings

The anionic character of Anjeka 6402 makes it particularly well suited for acid-catalyzed systems, where many dispersants are incompatible.

Recommended Dosage

Dosage is calculated as supplied, based on pigment weight:

These are starting guidelines based on practical experience. Optimal dosage varies by pigment type, resin system, and performance requirements. A series of laboratory tests is recommended to determine the best level for your specific formulation.

How to Add

For best performance, add Anjeka 6402 to the millbase before introducing pigments. This ensures the dispersant is properly positioned before high-shear processing begins, maximizing dispersion efficiency and the formation of fine, stable pigment particles.

Storage and Handling

Below 0 degrees C, separation and turbidity may occur during storage or transportation. This is normal and does not indicate product degradation. Simply heat to 30 to 40 degrees C and mix well before use. Performance is fully restored after proper heating and stirring.

Special Considerations

Baking System Compatibility
Due to its high acid value, Anjeka 6402 may potentially accelerate cross-linking reactions in baking systems. Monitor viscosity changes during storage of the coating system to ensure formulation stability remains within acceptable parameters.

Technical Data

Note: Values shown are typical and do not constitute specification limits.

Frequently Asked Questions

Q: What is the difference between Anjeka 6402 and Anjeka-6710?
Both products are dispersants for inorganic pigments, but they serve different formulation needs. Anjeka 6402 has a lower acid value (20-25 vs 330-380) and is formulated for broader compatibility, including organic pigments. Anjeka-6710 has very high acid value for maximum inorganic pigment affinity but with more formulation constraints. Choose based on your pigment type, resin system, and compatibility requirements.

Q: Can Anjeka 6402 be used for organic pigments?
Yes. While effective for inorganic pigments, Anjeka 6402 is also suitable for organic pigment dispersion, making it a versatile single-dispersant option for mixed pigment systems.

Q: Why does the product use xylene as a solvent?
Xylene provides good solubility for the polyurethane copolymer and is compatible with the solvent-borne and solvent-free coating systems where Anjeka 6402 is designed to perform.

Q: Will it work in acid-catalyzed coil coatings?
Yes. The anionic character of Anjeka 6402 makes it particularly well suited for acid-catalyzed systems such as coil coatings, where many other dispersants may be incompatible or cause instability.

Q: What happens if the product becomes turbid during cold storage?
Turbidity or separation below 0 degrees C is normal for this product. Warm to 30 to 40 degrees C and stir thoroughly. Performance is fully restored.

Q: How does steric stabilization work?
Steric stabilization uses polymer chains attached to pigment particles to create physical barriers that prevent particles from approaching close enough to flocculate. This results in more stable, longer-lasting dispersion compared to purely electrostatic stabilization methods.

Packaging

• 25 kg iron drum
• 200 kg plastic drum
• Custom packaging available for volume orders

Our Services

• Inquiry response within 24 hours
• High-quality products at competitive prices
• In-house R&D and technical support
• Professional service from consultation to delivery
• Flexible customization for packaging options
• On-time delivery with no delays

We operate a 6,000-tonne annual capacity production base in Songzi Chemical Park, Hubei Province. Stable production ensures consistent quality and reliable supply for long-term partners.