Barentz NV, Belguim
A client of our European partner Barentz was using a locally sourced antifoam for latex emulsion polymerisation. The product, based on mineral oils and fats, inevitably became solid when the thermometer dropped. Heating the oil and fat based antifoam was inpractical for operational reasons. The unreliability of the product was impacting the clients manufacturing process and PennWhite were asked to develop a food-contact antifoam that was workable and effective at cold ambient temperatures.
We began our development process with an existing PennWhite silicone based antifoam, Foamdoctor F2025. Our cold temperature testing of F2025 highlighted potential gelling and filtration issues with some of the latex polymers used by Barentz's client. Our development team produced and tested a revised formulation called ST2920. This overcame the gelling and filtration issues but failed to provide adequate foam control with some latex lattices. Working closely with the client, we refined the formulation into a new antifoam with development number ST925R.
In cold temperature tests ST925R performed effectively as an antifoam and resisted gelling. When tested in all foreseeable process conditions, the product remained liquid and easy to work with. Now renamed to Foamdoctor F2925, the antifoam is used by our original client and many similar commercial operations.