Highly Branched Structure Wetting And Dispersing Additive BYK 2152

Anjeka-6621 is a zero-release, highly branched wetting and dispersing additive specifically developed for solvent-free epoxy systems and other reactive coating formulations. With 100% active content and no carrier solvents, it delivers high-efficiency dispersion performance without diluting the reactivity or performance of the coating system.

Zero-Release, High-Efficiency Dispersion
Anjeka-6621 is formulated for reactive systems where solvent carriers are undesirable. Its 100% active content ensures every gram contributes to dispersion performance, making it ideal for solvent-free and low-VOC formulations.

Highly Branched Structure for Superior Stabilization
The highly dendritic polyester structure provides exceptional pigment and filler stabilization. During milling, the polyester side chains compress while amine groups bond strongly to pigment surfaces, creating a stable three-dimensional barrier that prevents reagglomeration and extends storage life.

Non-Reactive with Epoxy Systems
A critical design advantage: amine groups in Anjeka-6621 are physically adsorbed onto pigment surfaces, with polyester chains wrapped around them, preventing contact with the epoxy resin. This structural separation ensures the additive does not interfere with resin cross-linking reactions, maintaining full cure performance and long-term coating integrity.

Significant Viscosity Reduction
The additive substantially reduces system viscosity during dispersion, improving flow characteristics and making higher pigment loading possible without sacrificing processing ease or application properties.

Wide System Compatibility
Anjeka-6621 demonstrates broad compatibility across multiple resin systems. It has no negative effect on key coating properties including yellowing resistance, metal adhesion, or corrosion protection performance.

Suitable for Multiple Reactive Systems
Designed for use in:

• Solvent-free epoxy systems
• Two-component polyurethane systems
• Acid catalyzed systems

This versatility makes Anjeka-6621 a practical single-product choice for manufacturers running multiple reactive coating lines.

Special Recommendations:

• Industrial coatings
• Wood and furniture coatings
• Anti-corrosion coatings
• Automotive coatings

Dosage is calculated as dispersant solids to pigment volume ratio:

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

For best results, follow this incorporation sequence:

1. Pre-mix the resin and solvent components of the grinding system
2. Add Anjeka-6621 slowly with constant stirring
3. Wait until the additive is fully dispersed
4. Add pigments and proceed with grinding

This sequence ensures the additive is properly positioned in the resin system before pigment introduction, maximizing wetting efficiency and stabilization performance.

Store in a cool, dry place. Mix thoroughly before use.

Below 0 degrees C, delamination or turbidity may occur. This is normal and does not affect product quality. Simply heat to 20 degrees C and mix thoroughly until uniform. Performance is fully restored after proper heating and stirring.

Recommended storage period: do not exceed 12 months from date of manufacture.

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

Q: What makes Anjeka-6621 suitable for solvent-free epoxy systems?
Most dispersants contain solvents or use chemistry that can interfere with epoxy cure. Anjeka-6621 is specifically engineered to avoid this. The amine groups are physically adsorbed onto pigment surfaces with polyester chains acting as physical barriers, preventing them from reacting with the epoxy resin. This preserves full cure performance while maintaining excellent dispersion.

Q: Can it be used in polyurethane systems?
Yes. Anjeka-6621 is compatible with two-component polyurethane systems, making it suitable for multi-system manufacturers looking for a single dispersant solution across different reactive platforms.

Q: Why does the viscosity range vary so widely (5,000 to 20,000 cps)?
The wide viscosity range reflects the highly branched molecular structure. Different production batches within specification will naturally fall within this range. Viscosity does not affect dispersion performance — always ensure thorough mixing before use.

Q: Does it affect yellowing resistance?
No. Anjeka-6621 has been tested and shown to have no negative effect on yellowing resistance, metal adhesion, or corrosion protection. It maintains the full performance profile of the coating system.

Q: What happens if the product becomes turbid during cold storage?
Turbidity or delamination below 0 degrees C is normal. Heat to 20 degrees C and stir thoroughly until the product returns to a uniform liquid state. Performance is fully preserved.

Q: Why is 100% active content important for reactive systems?
In reactive systems such as solvent-free epoxies, every gram of solvent or inert carrier dilutes the system’s reactivity and can affect cure kinetics. Anjeka-6621’s 100% active content delivers maximum dispersion efficiency without compromising the reactive nature of the formulation.

• 25 kg internally coated iron drum
• 180 kg ring plastic drum
• Custom packaging available for volume orders

• 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.

Contact us to request product samples, technical consultation, or a quotation. Share your formulation details and performance requirements, and we will recommend the optimal starting dosage for your specific application.