русский
Español
Français
Home / News / Industry News / Why Does Waterborne Colour Paste Re-Coarsen and Thicken During Storage? DH-6312W Explained
Industry News
Waterborne Colour Paste · Pigment Dispersion · DH-6312W
As waterborne coatings and waterborne inks develop, requirements for pigment dispersion efficiency and storage stability in high-performance colour pastes continue to increase. If pigments cannot be fully de-agglomerated and dispersed, not only will system viscosity rise, but tinting strength, gloss, and subsequent application performance may also be affected.
High Colour Paste Viscosity
Insufficient pigment dispersion efficiency, affecting production and application.
Poor Colour Development
Pigments not fully de-flocculated — tinting strength and gloss are affected.
Poor Storage Stability
Re-coarsening, settling, or separation appearing after extended storage.
Low Grinding Efficiency
Long grinding time, reducing production efficiency.
Limitations of Traditional Approaches
Some formulations attempt to reduce viscosity by increasing dispersant dosage or adjusting the formula, but if the dispersion mechanism is insufficient, pigments can still easily aggregate — making it difficult to achieve low viscosity, high tinting strength, and storage stability simultaneously.
For waterborne colour paste, it is more necessary to utilise de-flocculation action to improve pigment dispersion stability.
DH-6312W: Nonionic Waterborne Dispersant
| De-Flocculation Action | Promotes pigment de-flocculation through steric hindrance — pigment particles disperse more finely and uniformly |
| Viscosity Reduction | Good viscosity-reducing capability — improves pigment tinting strength, gloss, and hiding effect |
| Low Foam | Low-foam characteristics — usually no additional defoamer is needed during grinding, helping to improve production efficiency |
| Applicable Systems | Particularly suitable for preparing resin-free colour pastes with approximately 30%–60% pigment content |
| Broad Compatibility | Widely applicable in waterborne coatings, waterborne printing inks, and adhesive systems |
Waterborne colour paste cannot do without a stable pigment dispersion system. Selecting a waterborne dispersant appropriately can not only reduce system viscosity but also improve tinting strength, gloss, and storage stability — providing more stable and reliable application performance for waterborne coatings, inks, and adhesives.
Frequently Asked Questions
What pigment types does DH-6312W work best with?
As a nonionic dispersant, DH-6312W has broad compatibility across both organic and inorganic pigments. It is particularly effective for high-surface-area organic pigments — such as phthalocyanines, carbon black, and quinacridones — where de-flocculation is most critical for colour development and stability. For specific pigment-dispersant matching, a small-scale grinding trial is recommended to confirm performance at the target pigment loading.
Can DH-6312W be used in resin-containing colour paste formulations?
Yes — while it is specifically formulated for resin-free colour pastes at 30%–60% pigment content, it is also applicable in resin-containing waterborne formulations. The nonionic structure provides broad let-down compatibility across different waterborne paint base systems.
