Evonik Launches Particle Dispersion Portfolio to Enhance Dot Sharpness and Resolution of Inkjet Ink Receptive Coatings

Essen, Germany. Evonik Coating Additives has introduced a range of four new AERODISP® dispersions based on SiO₂ or Al₂O₃ particles, designed to improve waterborne inkjet ink receptive coatings.

Excellent dot sharpness and high resolution are key supporting the transition from analogue to digital printing, especially for waterborne inkjet inks. In order to achieve high-quality results, it is necessary to control the spreading behavior and fixation of the inks on the substrate.

With the new range of waterborne AERODISP® dispersions, Evonik Coating Additives has developed products to ensure high dot sharpness and fixation of ink droplets on ink receptive coatings, also known as inkjet primers. The AERODISP® dispersions can be incorporated by simple stirring and are compatible with many different binders and formulations.

To meet the needs of different applications, two of these new AERODISP® dispersions are anionic and two are cationic. This allows for optimal interaction and fixation of the ink on the primer.

The anionic grades are particularly recommended for food packaging and decorative applications as they are compatible with non-ionic and anionic binder systems. The cationic grades are compatible with non-ionic and cationic binder systems, making them the first choice for primers for e.g., textile inks.

Overview of new AERODISP® dispersions:

• AERODISP® WR 8520 – anionic, SiO₂-based
• AERODISP® W 7520 WF – anionic, SiO₂-based, excellent food contact status
• AERODISP® WK 7330 – cationic, SiO₂-based
• AERODISP® W 630 – cationic, Al₂O₃-based, for high transparency

“We offer a comprehensive range of wetting agents for waterborne inkjet inks. Working with our customers, we have seen how important the substrate is. Ink receptive coatings, or inkjet primers, can ensure the highest resolution when formulated with our new AERODISP® dispersions,” says Susanne Struck, Global Head of Market Segment Inks at Evonik Coating Additives.

Evonik Coating Additives offers a broad range of products and services for inks, along with a wide selection of additives for waterborne, radiation-curable, and solvent-borne printing inks and inkjet inks.