Cognis FoamStar EF 20 and FoamStar EF 22 ? emission-free Star Technology

To help manufacturers successfully meet consumers’ demands for green and high-performance premium flat paints, s pecialty chemicals supplier Cognis has now launched two new defoamers : FoamStar EF 20 and FoamStar EF 22, which represent a breakthrough in defoaming efficiency with very low VOC. They can reduce the amount of defoamer needed in paints by up to 50 percent, thereby reducing the paint’s total amount of VOCs even further.

FoamStar EF 20 and FoamStar EF 22 combine state-of-the-art 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. For example, at a 40 percent lower dosage, FoamStar EF 20 and FoamStar EF 22 have a bubble break time of less than 100 seconds in 50 g/l paint.

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 around 0.3 percent (according to the US 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.

High-performance, sustainable solutions

Shailesh Shah, Director Global Marketing Coatings, comments: “FoamStar EF 20 and FoamStar EF 22 are in line with our Greenovating strategy of helping paint manufacturers to meet consumers’ demands for environmentally sound products. By utilizing our expertise in product formulation and consistently implementing our Greenovating strategy throughout the entire research and development stage, we aim to create innovative solutions that set new industry standards.” Greenovating enables paint and coatings manufacturers to satisfy market demands for products that are both green and high-performing ? thereby giving them a competitive edge in their markets.

FoamStar EF 20 and FoamStar EF 22 have a very low VOC content of around 0.3% while common mineral oil defoamers show around 4% VOC

FoamStar EF series have bubble break times less than 100 seconds at 40% lower dosage compared to common mineral oil defoamers. Bubble break time less than 150 seconds is considered as very good