Anjeka 4425 Water Based Rheology Additive Good Compatibility No Yellowing Weather Resistance

Anjeka 4425 is a liquid associative rheology modifier developed specifically for water-based coating systems. It is APEO-free and low VOC, making it suitable for environmentally responsible formulations.

The product builds a reversible rheological network through intermolecular hydrogen bonds. This allows formulators to precisely control base viscosity during storage, prevent pigment and filler sedimentation over the long term, and significantly improve anti-sagging performance during application.

A key practical advantage: Anjeka 4425’s rheological performance is not affected by system pH. It does not damage film gloss or transparency, offering broad compatibility across all types of waterborne coating formulations.

• Clear varnish
• Solid primer
• Matte topcoat
• Outdoor weather-resistant wood coatings

• Interior latex paint
• Exterior weather-resistant coatings
• Textured sand coatings
• Putty paste

Fully water-based systems only. APEO-free and low VOC compliant.

Precise Viscosity Control in Cans
The reversible hydrogen bond network maintains consistent base viscosity throughout storage, giving coatings the right consistency from the first batch to the last.

Long-Term Sedimentation Control
Pigments and fillers stay suspended. No hard settling at the bottom of the pail, even after months of storage. This reduces rework, improves shelf life, and keeps formulation performance consistent over time.

Anti-Sagging Performance
During application with heavy film builds, Anjeka 4425 prevents sagging before the film sets. This is especially important for thick coatings, vertical applications, and high-build systems.

pH-Independent Performance
Unlike some thickeners, Anjeka 4425 maintains consistent rheological behavior across the full pH range. No need to recalculate when pH shifts during formulation or storage.

No Impact on Gloss or Transparency
The modified polyurethane structure does not interfere with film appearance. Gloss levels and clear-coat transparency remain intact.

The molecular design centers on urea segments that form reversible hydrogen bonds with waterborne resin emulsions and pigment particles. This creates a smart, responsive rheological network with three distinct behavioral zones:

Low Shear — Storage Conditions
High viscosity keeps powders and pigments locked in suspension. Sedimentation is prevented even during prolonged storage.

High Shear — Application
Viscosity drops rapidly under brushing or spraying force. This allows smooth, effortless application without stringing or dragging.

After Shear — Post-Application
Viscosity recovers quickly once the shear force is removed. The coating stays in place without sagging, even under thick film build.

This pseudoplastic behavior is the mechanism behind Anjeka 4425’s performance across storage, application, and film formation.

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

Anjeka 4425 can be incorporated at any stage:

• Add during grinding stage for full integration
• Post-add for targeted viscosity adjustment

Use medium shear agitation to ensure uniform and rapid dispersion. Strict temperature control is not required during addition.

Rheological evaluation note: Obvious rheology improvement will typically be observed 2 to 4 hours after mixing, depending on system time and polarity. Allow adequate time before testing final performance.

Pre-Dilution Recommended
Due to its strong thickening effect, Anjeka 4425 may cause sharp viscosity rise if added too quickly or at too high a concentration. Pre-dilution is recommended in these cases to ensure smooth incorporation and avoid processing difficulties.

Cold Temperature Handling
Viscosity is higher at low temperature. Pre-dilution effectively reduces this effect and improves handling.

Storage of Diluted Solution
If pre-diluted, the storage stability of the diluted solution should be tested separately for each formulation, as compatibility varies case by case.

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

Store under dry conditions. Slight turbidity may occur during storage but will not affect rheological performance.

When added at dispersion temperatures no higher than 50 degrees C, effectiveness remains unchanged.

Recommended storage period: do not exceed 24 months.

Q: How is Anjeka 4425 different from conventional thickeners?
Conventional thickeners provide viscosity but often lack the responsive behavior needed for both sag resistance and smooth application. Anjeka 4425’s reversible hydrogen bond network delivers high viscosity at rest for storage stability, drops viscosity under shear for easy application, and recovers quickly after application to prevent sagging. This three-zone behavior is difficult to achieve with conventional additives.

Q: Will it work in high-pH or low-pH systems?
Anjeka 4425’s rheological performance is not affected by system pH within normal water-based coating ranges. This makes it more predictable and easier to formulate with across a wide variety of waterborne systems.

Q: Does it affect the final film’s appearance?
No. Anjeka 4425 is designed not to damage film gloss or transparency. Clear coats and high-gloss finishes remain clear and glossy.

Q: Can it be used in exterior coatings?
Yes. It is suitable for exterior weather-resistant wood coatings and exterior latex paints, among other exterior applications.

Q: What if the viscosity rises too sharply when adding?
Pre-dilution is the standard solution. Dilute with water or a compatible solvent before adding to the main formulation, and use medium shear agitation during incorporation.

Q: How long before I see the full rheological effect?
Rheological performance typically develops fully within 2 to 4 hours after mixing, depending on system polarity and formulation composition. Test performance after this equilibration period.

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

Inquiry response within 24 hours

High-performance 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, established in November 2022. Stable large-scale production ensures consistent quality, reliable supply, and competitive unit costs for our long-term partners.

Request product samples, technical consultation, or a quotation by contacting our team. Share your formulation details and performance targets, and we will recommend the optimal starting dosage for your specific application.

1. Respond to inquiries within 24 hours.
2. Superior quality products at competitive prices.
3. Strong R&D and technical support.
4. Dedicated professional team service.
5. Flexible customized production for various packaging options.
6. On-time delivery with no delays.

We are building a new large-scale production base strategically located in Hubei Province, with an annual capacity of 6,000 tonnes.

The interface additives project was officially established in the Songzi Chemical Park in November 2022.

• Stable large-scale production with enhanced quality control
• Lower unit production cost

• Contract manufacturing
• OEM / ODM partnerships