Airase 5355 and Airase 5655 defoamers are siloxane-based additives designed to control and quickly eliminate foam without generating surface defects in water-based pigment grinds, inks, overprint varnishes, adhesives and coatings. While the emphasis during the Airase 5355 defoamer development process was on maximizing anti-foaming effects, Airase 5655 defoamer was designed to focus on compatibility with other ingredients. A further option included in this new product portfolio to help formulators meet food contact compliances is the relatively compatible, oil-based Airase 4655 defoamer. All three products were developed specifically for use in food packaging applications.
They do not contain added mineral oils, hazardous air pollutants (HAPs) or alkyl phenol ethoxylates (APEs), and they are suitable for low-VOC formulations.
Surfynol 355 surfactant is a proprietary wetting agent designed to provide dynamic wetting without generating excess foam in water-based pigment dispersions, inks, overprint varnishes, adhesives and coatings. Thanks to its chemical properties, this product yields optimum results, even on difficult-to-wet substrates such as lithographic inks and silicone release liners, without contributing to excessive foam formation.
All four additives have two characteristics in common: broad applicability and exceptional performance in many different food contact end-use applications. All can be used in compliance with the complex mix of regional and national regulatory requirements in numerous countries, including the US (FDA 21CFR 175.105, 176.170, 176.180, etc.), Switzerland (Swiss Ordinance, Annex 10, Part A), Japan (not on the negative list for printing inks), and China (GB9685-2016).
Other regulations may also apply, depending on the application. Surfynol 355 surfactant and Airase 4655 defoamer, for instance, meet the stipulations of the European Union plastics directive (PIM EU 10/2011) and the recommendations of the German Federal Institute for Risk Assessment (BfR, Recommendation XIV & XXXVI). This ensures that packages processed with either these Airase or Surfynol food contact compliant products can be used safely throughout the world.
Evonik has launched a dedicated website to make it easy for its customers to learn more about the full portfolio of additives with food contact compliance. All information can be found at www.evonik.com/food-contact-status.