The flow curves in Figures below graphically illustrate this fact once more. AEROSIL 200 V by Evonik is an anti-caking, free-flowing, gelling and thickening agent. It can be used in the following systems: 1- According to DIN 9277 The information presented here was acquired by UL from the producer of the product or material or original information provider. Adhesive Coating agent Toner Cosmetics 1.3. Are you a distributor who is interested in being listed here? In the case of AEROSIL 200, despite a 12% concen- tration, hardly any thickening and thixotropic effect was noticeable in the polar polypropylene glycol. Our breadth, established objectivity and proven history mean we are a symbol of trust and enable us to help provide peace of mind to all. 7- Based on dried substance (2 hours at 105 C) UL and the UL logo are trademarks of UL LLC 2023 All Rights Reserved. Viscosity rebounding after shearing deformation of mineral oils, thickened with 6% AEROSIL R 805 and 12% AEROSIL R 972. Figure 15 Storage stability: test period 6 months; 5% SIPERNAT D 10 in mineral oil and silicone oil dispersions with 0.5% AEROSIL product added Evonik offers a broad range of surface treated silica products, which are either based on SIPERNAT precipitated silica or AEROSIL fumed silica. To test the effectiveness of the AEROSIL grades, disperse fumed silica together with the hydrophobic defoamer silica in the oil or defoamer formulation of interest. Combinations of precipitated and fumed silica may improve the stability of the formulation considerably; however, this is beyond the scope of this brochure and will be explored in the future. The interactions between the silanol groups of different AEROSIL particles are responsible for the formation and stability of the network. AEROSIL R 974 is hydrophobic fumed silica grades treated with DDS (Dichlordimethylsilane). They are recommended for improving the sedimentation stability of defoamer dispersions as well. The Business Line offers a diverse product portfolio for the coatings industry, like additives, co-binders, matting agents, fumed silica, specialty resins or nanoresins. It is hydrophilic fumed silica which is used to transform cosmetic Silica (>99.8%). Glenn delivers specialty chemical solutions for the formulation of Beauty Care products, optimizing go-to-market strategies through a differentiated market orientation, technical competence and a collaborative approach. At rest, the network reforms and the system recovers to its original viscosity. The yield points are almost identical at 93 Pa and 92 Pa, which means that AEROSIL R 805 is about twice as effective as AEROSIL R 972 in terms of yield point. However, UL assumes no responsibility or liability for the accuracy of the information contained on this website and strongly encourages that upon final product or material selection information is validated with the manufacturer. However, the commercial silica particles AEROSIL R974 with contact angle of 143.7 are more hydrophobic, and they help water droplets disperse in the oil phases, resulting in w/o emulsions, and the study of influence of particle concentration on the formation of emulsion are included in the supplementary material (Figs. Recommended use of the chemical and restrictions on use Relevant applications identified Silicone rubber Sealants Paints and varnishes. The information presented here was acquired by UL from the producer of the product or material or original information provider. You can add a product or formula to as many Lists as you need. Database of 28644 Adhesives Ingredients,reviewed and updated daily, Open your choices, compare products,ask for samples, contact suppliers, Be inspired and never miss again crucialinnovations with our weekly email updates, Cette page a bien t ajoute vos favoris. Lists combine the ease of Bookmarks with the versatility of Tags. This website uses cookies to ensure you get the best experience on our website. Formulations E-Learning (10) Data Sheets Technical Data Sheet. Products with the same brand name . AEROSIL R 974 offers advantages such as water resistance and improvement and maintenance of free flow and anti-caking characteristics of powders. 851. Evonik Operations GmbH, BL Coating Additives makes their documentation available in the regions indicated below: AEROSIL R 974 is a fumed silica powder that offers an alternative technology to stabilize water/oil emulsions. This Face Cream with AEROSIL R 974 is a water-in-oil Pickering emulsion. This website provides links to other websites owned by third parties. By clicking anywhere on our website you will accept our cookie policy. AEROSIL R 974 is a moderately hydrophobic treated fumed silica that is efficient in the thickening and thixotropy of low and non-polar emollients. Research, sample, quote and purchase 185,000+ ingredients, polymers and chemicals - all in one place. For incorporation of the silica we used a rotor-stator system Ultra-Turrax at 10.000 rpm for 1 minute. Rotational measurements were obtained using PK 20.4 and PK 30.4 cones and oscillation measurements were obtained using the Q 30 plate (clearance 1 mm) with a deformation of 5 % at a constant temperature of 25C. Due to the large number of defoamer formulations and possible (interfacially active) additives in defoamers, it is difficult to draw general conclusions about which AEROSIL grade is particularly appropriate. While positioning of a silica type on the x- axis is predominantly influenced by its hydrophobicity (lead property 1), its positioning on the y-axis is mainly determined by its surface silanol group density (lead property 2). In soap greases, thickened by fatty acid soaps of lithium, calcium, sodium or aluminum, AEROSIL fumed silica can be used to further improve the performance of the lubricating grease. It improves and maintains free flow and Say goodbye to traditional anti-dandruff ingredients! Product identifier Trade name hemical N ame CAS-No. For elastic like behav- iour to occur, we must assume that the hydrophilic AEROSIL particles exhibit hydrogen bonding while the hydrophobic AEROSIL particles react due to Van-der-Waals attractions. The dispersion of colloidal silicon dioxide nanoparticles (hydrophilic Aerosil 200 or hydrophobic Aerosil R974) either in the oily phase or in the aqueous phase led to the preparation of large (about 400 m diameter) surfactant free free-flowing particles. For example, a silica grade positioned in the red or yellow area means that the model defamer it is based on should have very good or good sedimentation stability. AEROSIL fumed silica is a highly dispersed, amorphous, very pure silica manufactured by high-temperature hydrolysis of silicon tetrachloride in an oxyhydrogen gas flame. All Tags have been converted to separate Lists, and your bookmarked items have been saved to a "Bookmarks" List. You can add a product or formula to as many Lists as you need. R 974 is a hydrophobic fumed silica after treated with DDS (Dimethyldichlorosilane) based on a hydrophilic fumed silica with a specific surface area o 200m2/g. 2023 PALMER HOLLAND. Russian . Italian . AEROSIL? Glenn delivers specialty chemical solutions for the formulation of Beauty Care products, optimizing go-to-market strategies through a differentiated market orientation, technical competence and a collaborative approach. 6- According to DIN EN ISO 787/18, JIS K 5101/22 As discussed earlier, these groups react due to Van-der-Waals forces. With the addition of shearing forces (shak- ing or stirring), the network is broken down, depending on the intensity and duration of the stress, and the viscosity is reduced accordingly. AEROSIL R 974 is a hydrophobic fumed silica aftertreated with DDS (Dimethyldichlorosilane) based on a hydrophilic fumed silica with a specific surface area of 200 m2/g. 3- According to DIN EN ISO 787/2, ASTM D 280, JIS K 5101/23 ** Narrower pH possible, depending on region. AEROSIL fumed silica improves properties of oil-based filling compounds for wire and cables to protect fibers (e. g. optical fibers) as it: The use of AEROSIL fumed silica is recommended for lubricating greases used in industrial applications, automotive, electrical as well as food grade. Obviously, the higher elasticity of the mixture thickened with AEROSIL R 805 is caused by the octyl groups on the surface. TEGOSOFT Liquid is a medium-viscosity cosmetic ester, similar to natural preen gland fat. AEROSIL R 974 should be used within 2 years after It improves and maintains free flow and anti-caking characteristics of powders. As Figure 14 demonstrates, that higher solids contents (e.g., a combination of SIPERNAT and AEROSIL grades) appear advantageous with respect to sedimentation stability. Hydrophobic component for thickening and reinforcement of RTV-1 pack silicone sealants, Water resistant, for thickening and hydrophobising of liquid systems, Rheology control of (complex) liquid systems, For use in coatings as anti-settling agent, for pigment stabilization and improvement of corrosion protection, Improves hydrophobicity and rheology of offset printing inks, Improvement and maintenance of free flow and anti-caking characteristics of powders, Due to large surface area improved thickening and thixotropic effect as well as transparency. The following paragraphs explain the thickening effect of AEROSIL, which depends on the polarity of the oil, as well as the mechanisms of thickening and thixotropy of the different silicas in liquids. This is based on the fact that the sedimentation rate drops as the viscosity rises. If we now compare the thickening effect of the hydrophobic AEROSIL grades in the three non-polar oils, the highest yield points and viscosities are achieved in all three oils (mineral, silicone and polybutene oil) when AEROSIL R 805 is used, while AEROSIL R 972 exhibits only a minimal thickening effect. Accelerating the test (e.g., applying centrifugal forces) is not recommended, because the shearing or centrifugal forces would destroy the three-dimensional network and could falsify the test result. The dielectric constant, as measured at 1 MHz and 25C, was 2.17 for mineral oil, 2.19 for polybutene oil and 2.67 for silicone oil. Table 1 - Yield points and viscosities of Drakeol 35 (mineral oil) and Baysilon M 1000 (silicone oil), thickened with 6 % and 12 % different AEROSIL grades. Initially, there is resistance against being deformed; the system indicates solid-like behaviour. In the first test, the shear rate was increased linearly within 2 minutes from approx. The primary particles formed in the AEROSIL process are virtually spherical and free of pores. Easily see which Lists this item appears in, and quickly go to that List from the links that appear on the page. AEROSIL R 816 is used in cosmetics. Details of the supplier of the safety data sheet Multifunctional anti-dandruff solution: Aevum Vita 406 - Register now, A versatile alternative to quat-based antimicrobials, Hair care (Shampoos, Conditioners & Styling), Skin care (Facial care, Facial cleansing, Body care, Baby care), Sun care (Sun protection, After-sun & Self-tanning), Enhance the performance of active ingredients. The methyl groups on the surface of AEROSIL R 972 are obviously too short to achieve the same large particle- particle interactions. When you click the Add to List button, a dropdown of your existing Lists appears. However, application technology constraints often greatly reduce the latitude for this approach. Evonik Operations GmbH, BL Coating Additives makes their documentation available in the regions indicated below: AEROSIL R 974 is a fumed silica powder that offers an alternative technology to stabilize water/oil emulsions. Contact us! The effect of the AEROSIL product is based on the formation of a three-dimensional physical network with viscoelastic properties based on hydrogen bonds. It is a densified hydrophilic fumed silica. . AEROSIL R 974 is supplied in multiple layer 10 kg bags. Procedure: Place Cylcopentasiloxane, VARONIC APM/APS and fragrance oil into a mixer. General . Applications and properties Applications Silicone rubber and silicone sealants Paints and coatings Negative toner Adhesives Coating polymers Cosmetics Properties The test results in Table show, that when the AEROSIL grades are used, different viscoelastic properties can be obtained in the thickened oils. You may choose a language below to continue to this industry or close this dialog above. It is possible to make a rough estimate of the amount of AEROSIL product needed to stabilize the dispersion against sedimentation, provided that the size of the settling particles, their density , and the yield point y of the dispersion can be measured. It is used in adhesives and silicone sealants. To do this, the frequency was increased from 0.1 Hz to 9.8 Hz at a constant deformation of 5%. AEROSIL R 974 is commonly used in w/o pickering emulsions and also aids in the anti settling of particles in liquid formulations, Glenn AEROSIL R 974 by Evonik is a water resistant ingredient for thickening, hydrophobising & rheology control of liquid systems. The remain- ing silanol groups support this mechanism in non-polar sys- tems by forming hydrogen bonds, whereas in polar systems they are shielded by the functional groups, particularly those of AEROSIL R 805 and AEROSIL R 202. All other trademarks are the property of their respective owners. SILICA. The yield point recovers almost to its original value. Click the List name to which you want to add this product or formula. With this model, we can explain why AEROSIL R 805 is about twice as effective as AEROSIL R 972 in terms of yield point. Our breadth, established objectivity and proven history mean we are a symbol of trust and enable us to help provide peace of mind to all. For all defoamer components, besides the components themselves, the way they are processed and order they are added also make a difference. Portuguese . AEROSIL R 974 by Evonik is fumed silica after treated with dimethyldichlorosilane. Thickeners & Stabilizers > Mineral-based > Silicas & Silicates. AEROSIL R 974 by Evonik is fumed silica after treated with dimethyldichlorosilane. SIPERNAT and AEROSIL for Defoamer Brochure, SIPERNAT and AEROSIL in Technical Powders Application Data Sheet, SILICA - A Manifold Solutions for Plastics, AEROSIL Fumed Silica Cable Gel Applications Brochure, AEROSIL Fumed Silica Lubricating Grease Applications Brochure, AEROSIL Fumed Silica Cable Gel Products Technical Brochure, AEROSIL Fumed Silica in Lubricating Greases, Physico-chemical Properties of Silica Products, Sedimentation Stability of Defoamer Formulations, Viscosity Modifier,Thickener,Rheology Modifier, Performance Additives, Rheology Modifiers, Fillers & Extenders, Rheology Modifiers & Stabilizers, Thixotropes, Fluids & Lubricants, Automotive Fluids & Lubricants, Aerospace & Aviation, Rheology Modifiers, Carriers, Diluents, Solvents & Solubilizers, Surface Modifiers, Functional Additives, Rheology Modifiers & Stabilizers, Rheology Modifiers, Rheology Modifiers & Stabilizers, Building & Construction Building Materials, Industrial Chemical & Industrial Manufacturing, Automotive & Transportation Lubricants & Functional Fluids, Loss on Drying (2h at 105C, when leaving the plant), Hydrophobic component for thickening and reinforcement of RTV-1 pack silicone sealants, Water-resistant, for thickening and hydrophobicity of liquid systems, Rheology control of (complex) liquid systems, Improvement and maintenance of free flow and anti-caking characteristics of powders, Due to large surface area improved thickening and thixotropic effect as well as transparency, Supports to isolate sensitive optical fi bers from external forces, Provides thickening to help the gel to stay where it is placed, Helps to form a seal to keep out contaminants like dust, dirt and water, Is non-conductive / does not negatively infl uence di-electrical properties.
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