What Causes Paint to Separate During Storage?

Does your paint settle after storage?

If you have this problem, simply increasing the viscosity may not be the right solution.

In solvent-based coatings, sedimentation can be related to pigment density, dispersion stability, and rheological control.

When the formulation doesn't have enough low-shear viscosity, pigments and fillers can gradually settle during storage.

This is where an organoclay rheology modifier can be useful.

Organoclay can build a three-dimensional structure in the coating, helping improve suspension and anti-settling performance.

But choosing the right organoclay is important.

Compatibility with the solvent system, activation method, dosage, and formulation all matter.

So, if your coating has a settling problem, don't just look at viscosity. Look at the whole rheology system.

If you're working with solvent-based coatings and facing a similar problem, feel free to contact me.