American Coatings Show 2018

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4.5 Design of Pigment Dispersants for High-Performance Applications (Room 234-236)

09 Apr 18
4:30 PM - 5:00 PM

Tracks: Session 4: Grinding & Dispersing, Session 4: Novel Materials

With increasing regulatory and environmental requirements there is a drive towards developing water based VOC free pigmented coating formulations with the same aesthetic properties as solvent based systems. The pigment dispersant in addition, to providing fast wetting and desirable colouristic effects will also impact the overall durability of the coating. Novel anchor groups have enabled us to design improved dispersants which can be formulated into coatings with superior jetness and colour strength. These dispersants can reduce the particle size in much less time than conventional dispersants using less energy during the milling process while providing the required stability and compatibility in the coating formulation. In addition, through efficiency in design couple with judicious selection of stabilising chains, the dispersant can be optimised to minimise its impact on water sensitivity and corrosion resistance. After proving that these principles deliver superior dispersants on organic pigments and carbon black, our recent focus has been to deliver the same benefits on high end inorganic pigments for industrial applications such as transparent iron oxides. In this paper we will discuss these design principles and show how this has translated into superior performance in waterborne industrial coatings.