ASTRA DISP®
Dispersants
Dispersants for uniform distribution of solid pigments in liquid binders. Prevent flocculation, gloss loss, color shift, separation, sedimentation, and flow problems.
Why do we use dispersing additives?
The use of wetting and dispersing additives is crucial in the production of pigmented coatings. This is due to the need for a uniform distribution of solid pigments within the liquid binder solution. If the pigment grinding process is not optimized, various defects can occur, such as flocculation, reduced gloss, color shift, separation, Benard cells formation, and settling. This can also have an impact on the flow properties of the coating system, leading to issues like sagging and leveling.
Key Benefits
- Uniform Pigment Distribution — ensures pigments are evenly distributed throughout the binder
- Prevention of Flocculation — pigments stay separate, providing consistent color
- Enhanced Gloss — proper dispersion preserves high gloss levels
- No Color Shift — accurate color reproduction
- Prevention of Separation — long-term storage stability
- No Benard Cells — eliminates hexagonal patterns on coating surface
- Improved Flow and Leveling — eliminates sagging and poor leveling
Impact on Coating Performance
Using dispersing additives not only improves the visual and physical properties of coatings but also enhances their durability and longevity. A well-dispersed pigment system contributes to a more stable, vibrant, and defect-free final product, making it essential for industries where high-quality finishes are required.
P – organosoluble systems, B – water-based systems, UV – radiation-curable systems
Product Catalog
Download TDS| Active % | Feature | TDS | Samples | |||
|---|---|---|---|---|---|---|
| ASTRA DISP-5406 | DISPERBYK-190 | Water-based | 40% | Particularly suitable for dispersing organic pigments in water. Reduces the viscosity of the system, does not provoke foam, increases the gloss of the paintwork. | ||
| ASTRA DISP-5506 | DISPERBYK-190 | Water-based | 40% | Particularly suitable for dispersing organic pigments in water. Reduces the viscosity of the system, does not provoke foam, increases the gloss of the paintwork. | ||
| ASTRA DISP-5906 | DISPERBYK-191 | Water-based | 100% | Particularly suitable for dispersing organic pigments in water. Reduces the viscosity of the system, does not provoke foam, increases the gloss of the paintwork. |
Articles about ASTRA DISP®
Knock Foam Down in One Shift: Plant R D Playbook for Polymer Emulsions
Knock Foam Down in One Shift: Plant R D Playbook for Polymer Emulsions ! Polymer emulsion foam title card illustration The fastest, most reliable way to control foam in emulsion polymerization is a compatibly tuned silicone-polyether defoamer, or a screened mineral or molecular alternative, dosed at…
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Formulators' Lab to Plant Playbook for Pigment Dispersion plus DLS
Formulators' Lab to Plant Playbook for Pigment Dispersion plus DLS ! Pigment dispersion laboratory title card illustration Most pigment dispersion issues trace back to one of four culprits: poor wetting, a dispersant mismatch or dosage error, letdown solvent stripping the dispersant off the pigment…
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Coating Chemists: 4-Step Lab Diagnosis for Flooding and Floating
Coating Chemists: 4-Step Lab Diagnosis for Flooding and Floating ! Coating defect diagnosis title card illustration Flooding is a uniform surface color shift caused by vertical pigment migration during film formation, while floating produces streaks or mottled patches from horizontal pigment separat…
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