Raw Materials & Equipment

Cognis offers two new FoamStar defoamers

January 20, 2011

To help meet consumers’ demands for green and high-performance premium flat paints, Cognis has launched two new defoamers: FoamStar EF 20 and FoamStar EF 22. The two new defoamers represent a breakthrough in defoaming efficiency with very low VOC. They can reduce the amount of defoamer needed in paint by up to 50 percent, thereby reducing the paint’s total amount of VOCs even further, according to the company. FoamStar EF 20 and FoamStar EF 22 combine technical performance and sustainability benefits. Within its FoamStar EF series, they are among the most efficient defoamers requiring 30 to 50 percent less dosage in order to achieve the benchmark performance of mineral oil defoamers. Besides a lower VOC contribution and very low odor they effectively prevent micro foam - making them ideal for use in premium paints that contain less than 100 grams of VOC per liter. They also offer very high persistency and fast bubble break times. Cognis’ two latest innovations in hyperbranched polymer defoamer technology are delivered in an essentially emission-free hydrocarbon matrix. FoamStar EF 20 and FoamStar EF 22 have a VOC content of approximately 0.3 percent (according to the U.S. EPA method 24), while conventional mineral oil defoamers contain an average of four percent. This, coupled with the fact that much smaller amount of the FoamStar EF series defoamers is needed, means that the total VOC content of paints is reduced. More info: Cognis Corp., Web: www.cognis.com.