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Home  > Publications  > Blog  > Dispersing pigments without bead mills?

Monday, 20 May 2019

Dispersing pigments without bead mills?

Thursday, 19 June 2014 | Posted by: Sonja Schulte, European Coatings Journal

The dispersion of fillers and pigments in one of the most important and most energy consuming steps during paint production. When the requirements on fineness are high or the solid matter is difficult to disperse the dispersion with the dissolver is often insufficient. Thus paint producers often are forced to add another step – the milling process with a bead mill. This of course takes more labor time and more energy. A few weeks ago a producer of organic pigments for water-borne and solvent-based coatings systems presented at a conference a new kind of pigments which can be sufficiently dispersed only by using a dissolver. The speaker stated that no bead mill is longer needed. I think, if this holds true paint production will be revolutionized. But, what is the secret behind this technology?

When I got it right the pigment producer implemented a step in the production process of the organic pigment where specific additives are directly added to the pigment. As a result the pigments do not agglomerate. The advantages for the paint producer are according to the pigment producer:

-          No bed mill is needed anymore

-          Dispersion time is reduced by a factor of more than 50%

-          Energy costs for dispersion process is reduced by 90%

-          Cleaning time is reduced by about 80%

These numbers sound quite convincing to me. I would be interested in our experiences with this kind of technology.

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Author

Sonja Schulte
European Coatings Journal
Sonja Schulte
Editor-in-Chief, Science & Technology
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