How to Select a Dispersant for High-Performance Coatings
A practical guide to pigment wetting, viscosity control and long-term stability in modern coating formulations.
Why dispersant selection matters
A dispersant is one of the most important additives in a coating formulation. It controls how pigments are wetted, separated and stabilized during grinding and storage.
When the dispersant is selected correctly, the formulation gains better color strength, lower viscosity and improved storage stability.
Key selection criteria
- Pigment type and surface chemistry
- Water-based or solvent-based system
- Required viscosity profile
- Grinding process and target particle size
- Compatibility with binders and other additives
Practical recommendation
Start with the target application and resin system, then evaluate dispersants by viscosity reduction, color development and stability after heat aging.
ASTRA technical specialists can help compare several additive options and select the most efficient dosage for your formulation.
Testing additives for this application?
Send us your current formulation challenge and our technical team will recommend an ASTRA product package for lab screening.