How Dispersants Improve Waterborne Coating Application

How a Dispersant Can Fix Leveling, Foam and Application Problems in Waterborne Coatings

2026/06/12

Waterborne Dispersant Technology

A waterborne coating that won't lay down smoothly, leaves trapped air after application, or shows a slightly textured surface even though the formulation "looks right" on paper often has the same underlying cause: the pigments and fillers are not being wetted quickly or evenly enough during the early stages of mixing. That single point — how fast and how completely the solid particles are wetted out — has a knock-on effect on flow, foam, and final film appearance.

How Wetting Affects the Whole Application Process

Pigment and filler wetting happens at the very start of the production process, but its effects show up much later — at the point of application. If particles are not wetted efficiently, the system carries that inefficiency forward into every later stage of processing and application.

Leveling Quality	Insufficient wetting leaves micro-scale surface irregularities that show up as uneven leveling once the film is applied
Pigment & Filler Wetting	Slow or incomplete wetting reduces overall dispersion efficiency and can affect long-term system stability
Foam Behavior	Air introduced during high-shear mixing is harder to release when wetting is poor, leaving microfoam in the final film
Application Window	Waterborne systems already have a narrower application window than solventborne; poor wetting narrows it further

Why Process Tweaks Alone Rarely Fix It

It's common to respond to leveling problems by adjusting application technique, adding more wetting agent at the letdown stage, or extending mix time. These adjustments can mask the symptom locally, but if the pigment and filler surfaces were not wetted efficiently from the start, flow, foam, and application stability cannot all be addressed at once through process changes alone — the fix needs to happen at the dispersion stage.

DH-5107: A Dispersant Built for Application Performance

DH-5107 is a dispersant with strong wetting characteristics, designed to bring pigments and fillers into contact with the carrier system quickly and distribute them evenly. The result is a system that behaves more predictably from the moment it's applied — better flow and spreading, a finer and more even surface, and reduced microfoam carried through to the final film.

Faster Wetting

Brings pigments and fillers into contact with the system efficiently, supporting smoother overall processing from the start.

Improved Flow & Spreading

Optimizes the system's flow and spreading behavior, helping the film form a finer, more even surface during application.

Lower Foam Tendency

A reduced tendency to foam, plus a degree of foam control, helps minimize the impact of trapped air on final film appearance.

Waterborne Compatibility

Good adaptability across waterborne systems, supporting overall stability and a smoother application experience.

From Dispersion to Finished Film

1. Wetting

Pigments and fillers are rapidly wetted and brought into uniform contact with the carrier system during initial mixing.

2. Application

The improved flow and spreading behavior translates into smoother application with fewer foam-related defects.

3. Finished Film

A more even, finer surface forms with reduced microfoam, supporting consistent appearance across the application area.

Frequently Asked Questions

Can DH-5107 be used alongside an existing wetting agent?

Yes, in most formulations it can be evaluated alongside existing additives. Because it addresses wetting and dispersion at an earlier stage, it can sometimes reduce reliance on later-stage wetting agents — this is best confirmed with a small trial.

Does it work only in waterborne systems?

DH-5107 is specifically developed with waterborne application performance in mind, and its compatibility profile is geared toward waterborne formulations.

Will it help with foam that appears during high-speed mixing?

It is designed with a lower foam tendency and some foam-control characteristics, which can help reduce foam introduced during high-shear mixing, though severe foaming issues may still benefit from a dedicated defoamer.

How should I start testing DH-5107 in my formulation?

A common starting point is to substitute or supplement your current dispersant at a comparable dosage and evaluate leveling, foam, and gloss on a drawdown panel before scaling to production.