Member Company of Fong s Industries Group Antifoams / Defoamers Antifoam
About Us Evonik is the creative industrial group from Germany which operates in three business areas: Chemicals, Energy and Real Estate. Evonik is a global leader in specialty chemicals, an expert in power generation from hard coal and renewable energies, and one of the largest private residential real estate companies in Ger-many. Our strengths are creativity, spe-cialization, continuous selfrenewal, and reliability. Evonik is active in over 100 countries around the world. The Business Line Interface & Performance of Evonik has its base in all kinds of organic specialty surfactants and organomodified siloxanes. We hold strong positions with antifoams, emulsifiers, corrosion inhibitors, dispersing aids, hydrophobing and wetting agents, softeners and radiation curable release coatings. Our broad product range, technological background and application know-how addresses several industries like plastics, rubber, label, tape and release liner manufacturing, construction, lubricants, agro, textile and tissue industry. 2
Product Range The textile industry is facing many conflicting challenges, such as the need for higher efficiency, reducing cost through shorter product cycles while maintaining a high quality standard and continuously providing innovation. Aside from the beneficial characteristics of surfactants (leveling agents, scouring agents, wetting agents etc.), they are also responsible for the formation of foam during almost all stages of production. For instance, the jet fills with foam and the production cannot proceed at optimum speed. Care has to be taken that the applied antifoam does not negatively impact the fabric quality by staining the fabric, or does not disturb the machine runnability. Our antifoam/defoamer product range comprises: Concentrates Emulsion concentrates Ready to use emulsions Depending on the antifoam / defoamer, it can be either added as an internal antifoam thus being incorporated into the textile auxiliary to prevent foam formation, or added as an external antifoam, whereby being added at the occurrence of the foam to destroy it. entering spreading rupture escaping gas 1 2 3 4 5 Figure 1. Mechanism of defoaming = defoamer 3
Key Application Properties Evonik offers antifoams/defoamers based on organo-modified siloxanes. High stability as well as high efficiency during various textile application processes merge the advantanges of both organic and silicone antifoams. In addition, we offer silica and silicone oil free defoamers. The following table summarizes the relevant property profiles of our antifoams/defoamers: Product Composition Ionic Type Physical Form Conc. wt % Advantages and Application Suggestions Antifoam 793 Antifoam 3062 Antifoam MR 1015 Antifoam 7001 Antifoam 2290 Antifoam PS 10 (Europe) Antifoam 32 H 10 (Asia) Concentrate based on organo-modified siloxanes Non-ionic Liquid 100 Concentrate based on organo-modified siloxanes Non-ionic Liquid 100 Emulsion concentrate based on organomodified siloxanes Non-ionic Liquid 70 Jet stable antifoam concentrate Non-ionic Liquid 40 Silica and silicone oil free defoamer concentrate Non-ionic Liquid 100 Emulsion based on organo-modified siloxanes and other ingredients Non-ionic Liquid 10 Emulsion based on organo-modified siloxanes and other ingredients Non-ionic Liquid 16-17 Water dispersable, no silicone spotting, no reverse effect on printability, excellent stability as concentrate. Pre-defoaming of surfactant concentrates with less than 30 % water content. No silicone spotting, no reverse effect on printability, excellent stability as concentrate. Pre-defoaming of surfactant concentrates with less than 20 % water content. Excellent stability in alkaline conditions, even at elevated temperatures. Jet-stable. Pre-defoaming of surfactant concentrates. In aqueous media, the use of pre-dilutions (1:3 to 1:10 in water) is recommended. Ready to use predilutions are available on request. Emulsion concentrate with excellent jet stability and good electrolyte tolerance. Easy to dilute. Suitable for the production of ready to use dilutions. Recommended for jet dyeing of polyamide. Easy to handle as on line defoamer, e.g. for white water in nonwoven production using water entanglement. Antifoam for jet dyeing. No silicone spotting. Predilutions have to be used immediately after preparation. Antifoam for jet dyeing. No silicone spotting. Predilutions have to be used immediately after preparation. 4
Performance data and use recommendations for Antifoam 7001 jet defoamer Jet dyeing of polyamide fabric in a laboratory Jet Dyeing Machine (Mathis) Parameters: Fabric: pump nozzle 50%, reel speed 17m/min PA elastic knitted fabric Liquor ratio: 1:30 Recipe: Nylosan Red E-BNL Dymatic TBW-951 0.3 % Dyestuff from Clariant 1.0 g/l Leveling agent from Dymatic (Alkylsulfonate) Acetic Acid 1.0 g/l Adjustment of ph ~5 Defoamer 0.5 g/l (based on solid) Foam build-up during dyeing process Add the chemicals at 40 C, heat up to 100 C (1.5 C/min) hold for 100 C for 30 min, cool down to 70 C (1.5 C/min). 1.5 C/min 100 C for30 min 1.5 C/min 40 35 40 C 70 C time / min 0 10 20 30 40 50 60 70 80 90 70 C foam height / cm 30 25 20 15 10 TA 7001 Comp. 1 Comp. 2 Comp. 3 Comp. 4 5 0 Antifoam 7001 provides efficient foam knock down, while the competition products do not suppress the foam sufficiently over the whole process. 5
Recommendations for dilution Guideline formulation for stable, ready to use diluted emulsions of Antifoam 7001: 10% active 20% active Demineralised water 69.68 parts 46.42 parts XP 2226 2.63 parts 1.75 parts Caustic Soda (5.6%) 2.59 parts 1.73 parts Antifoam 7001 25.00 parts 50.00 parts Preservative 0.10 parts 0.10 parts Production (at room temperature): Charge the water into the vessel. Add XP 2226 and stir for 1 min. Add caustic soda and stir until dilution is homogenous and thick. Stop stirring and add Antifoam 7001 and preservative. Start stirring at low shear rates until mixture is homogenous (approx. 5 min). Stop stirring and discharge. 6
Dosage/Handling Antifoam 7001 can be applied as it is or in a diluted version. Dosage level may vary in dependence of process conditions. For preliminary trials we recommend a dosage of Antifoam 7001 between 0.025 % and 0.25 % (as is). Further dilution in production process is possible. For use in jet dyeing applications a predilution of antifoam in water (1 part in 4 parts of water) is recommended. Dosage level for dyeing in jet machines also depends on the kind and concentration of leveling agents and dyeing systems. The following table has to be seen as an orientation guide and is based on the lab jet results (% is based on actives). Dosage recommendation fabric Surfactant(s) Dosage of Antifoam 7001 PA alkane sulfonate (0.05 %) < 0.05 % CO alkane sulfonate (0.05%) / alcohol ethoxylate (0.05 %) 0.02 % PES alcohol ethoxylate (0.2 %) 0.01 % 7
www.evonik.com/textile-auxiliaries This information and any recommendations, technical or otherwise, are presented in good faith and believed to be correct as of the date prepared. Recipients of this information and recommendations must make their own determination as to its suitability for their purposes. In no event shall Evonik assume liability for damages or losses of any kind or nature that result from the use of or reliance upon this information and recommendations. EVONIK EXPRESSLY DISCLAIMS ANY REPRESENTATIONS AND WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, AS TO THE ACCURACY, COMPLETENESS, NON-INFRINGEMENT, MER- CHANTABILITY AND/OR FITNESS FOR A PAR- TICULAR PURPOSE (EVEN IF EVONIK IS AWARE OF SUCH PURPOSE) WITH RESPECT TO ANY INFORMATION AND RECOMMENDATIONS PROVIDED. Reference to any trade names used by other companies is neither a recommendation nor an endorsement of the corresponding product, and does not imply that similar products could not be used. Evonik reserves the right to make any changes to the information and/or recommendations at any time, without prior or subsequent notice. Europe Middle East Africa Evonik Nutrition & Care GmbH Goldschmidtstraße 100 45127 Essen Germany Phone +49 201 173-2665 fax +49 201 173-1990 www.evonik.com Asia Pacific Evonik Specialty Chemicals (Shanghai) Co., Ltd. 55, Chundong Road Xinzhuang Industry Park Shanghai, 201108 PR China Phone +86 21 6119-1125 fax +86 21 6119-1406 The Americas Evonik Corporation 7801 Whitepine Road P.O. Box 34628 Richmond, VA 23234 USA Phone +1 804 727-0700 fax +1 804 727-0855 07/2015 Inv.-Nr.: 64-15