What five key indicators should be checked before selecting a pigment dispersant for industrial coatings?
Release time: 2026-08-15
Table of Contents
In industrial coating formulations, the choice of pigment dispersant directly determines the tinting strength, gloss, storage stability, and application performance of the final product. Properly evaluating these key indicators can not only avoid quality problems such as floating color and sedimentation, but also significantly reduce production costs and improve formulation efficiency.
What five key indicators should be checked before selecting a pigment dispersant for industrial coatings?
1. How compatible is the resin system?
The dispersant must be well-compatible with the resins in the formulation (acrylic, polyurethane, epoxy, etc.) to avoid layering, flocculation, or abnormal viscosity.
2. Is the pigment type compatible?
Organic pigments, inorganic pigments, carbon black, or effect pigments require different anchoring groups (amino, carboxyl, phosphate esters, etc.), and selection should be based on the surface chemical characteristics of the pigment.
3. How are the tinting strength and gloss performance?
A high-quality dispersant should maximize pigment dispersion, improve color strength, transparency, and gloss, while reducing defects such as floating color and blooming.
4. Are the viscosity and grinding efficiency optimized?
Dispersants should reduce grinding viscosity, shorten grinding time to the target fineness (Hegman value), and reduce energy consumption and production cycle.
5. Does storage stability meet standards?
A heat aging test (40-50℃/2-4 weeks) is required to check for sedimentation, coarsening, viscosity changes, or gelation.
Systematic evaluation of five key indicators—resin compatibility, pigment matching, color performance, grinding efficiency, and storage stability—is the core basis for selecting pigment dispersants for industrial coatings. Scientific screening not only avoids common defects such as floating color, sedimentation, and viscosity fluctuations but also significantly improves overall product performance and production efficiency.
