HDK HYDROPHOBIC AND HYDROPHILIC FUMED SILICA

1 HDK FUMED SILICA Provides Performance Enhancing AdvantagesWACKER, a world-leading producer offumed SILICA , offers a complete portfolio of HYDROPHOBIC and HYDROPHILIC grades serving many industries and applications. Supported by decades of experience and hands-on technical expertise, HDK FUMED SILICA imparts outstanding reinforcement, rheology control and acts as a free-flow additive in powders. PARTNERS IN PROGRESS | INNOVATIVE SOLUTIONSPARTNERS IN PROGRESS | INNOVATIVE SOLUTIONSHDK HYDROPHOBIC AND HYDROPHILIC FUMED SILICA22 HDK FUMED SILICA PRODUCTS & PROPERTIESAPPLICATIONSP roduct TypeProduct NameTreatmentSurface Area (mg2/g)

2 FunctionHydrophilicHDK V15 None150 ReinforcementRheology controlHDK N20 None200 ReinforcementRheology controlHDK T30 None300 Free flowReinforcementRheology controlHDK H13 LDimethyl-siloxy130 ReinforcementRheology controlHDK H15 Dimethyl-siloxy150 ReinforcementRheology controlHDK H20 Dimethyl-siloxy200 Free flowReinforcementRheology controlHDK H30 Dimethyl-siloxy300 Free flowReinforcementRheology controlHDK H2000 Trimethyl-siloxy200 ReinforcementRheology controlHDK H17 Polydimethyl-siloxy150 ReinforcementRheology controlHDK H18 Polydimethyl-siloxy200 ReinforcementRheology controlIncreasinglyHydrophobicDensed GradesHigher bulk density grades HDK are available.

3 These grades are made from standard HDK that is mechanically compressed to increase the bulk density and enable it to be packaged more efficiently. This results in advantages in shipping and can be very useful in some applications. Densed grades may require more care in processing to get effective dispersion. Contact your Brenntag representative to see if a densed grade may right for your application. 3 APPLICATIONSP roduct NameAdhesives, Caulks & SealantsCoatings & PaintsElastomersSiliconeElastomericReact ive ChemistriesSolvent-Based100% SolidsPowderSolvent-BasedSiliconeNatural & SyntheticHDK V15 HDK N20 HDK T30 HDK H13L HDK H15 HDK H20 HDK H30 HDK H2000 HDK H17 HDK H18 HDK in Food and Pharmceutical ApplicationsHDK N20 Nutrition is produced for food additive applications.

4 It meets specific FDA standards and is handled in accordance with applicable food additive guidelines. It is primarily used as a free-flow and anti-caking additive. HDK N20 Pharma meets the requirements of the major is used in a variety of pharmaceutical applications and is especially useful as a glidant and reinforcement in tablets. Applicable certifications includingKosher and Halal are available for HDK N20 Nutrition and HDK N20 Pharma. See your Brenntag Representative for more 4 Highly recommended Recommended SuitableAPPLICATIONSBENEFITSP roduct NameCompositesAdvantagesUnsaturated PolyesterVinyl EsterEpoxyHDK V15 Excellent reinforcement in elastomers, highly effective in silicones , provides some rheology controlHDK N20 Excellent rheology control in non-polar systems, good reinforcement HDK T30 Excellent rheology control where optimum transparency is needed requires good dispersion, excellent free flow & anti-caking in powder systems HDK H13 LHydrophobic grade with excellent dispersability.

5 Capable of high loadings in non-polar systems for reinforcement, good rheology control in moderately polar systems HDK H15 Capable of high loadings in non-polar systems for reinforcement, good rheology control in moderately polar systems HDK H20 Free flow in powder coatings, grinding & processing aid in powder coatings, good rheology control in moderately polar systems HDK H30 Excellent free flow in powder coatings, grinding & processing aid in powder coatings HDK H2000 Provides highest reinforcement with minimum viscosity build in non-polar systemsHDK H17 Good rheology control in polar systems needing the easiest dispersability HDK H18 Excellent for rheology control in highly polar sytems, outstanding for non-sag epoxy & urethane adhesives and sealants HDK in Personal Care ApplicationsHDK is an important ingredient in a variety of cosmetic applications.

6 WACKER has several products with INCI designations and full dossiers forpersonal care use. Please contact your Brenntag representative for more s extensive experience in the production of FUMED SILICA allows us to produce a product with outstanding performance. Our portfolio comprises HDK grades for a wide range of appli-cations in many different industries. HDK FUMED SILICA is: A synthetic pyrogenic amorphous SILICA Non-crystalline SILICA Odorless, chemically inert and has no adverse health or environmental effects when used as recommendedHDK HYDROPHILIC FUMED SILICA is: Untreated and has a strong affinity for water Useful for thickening non-polar solvents such as xylene, styrene and mineral spirits Useful for reinforcing and thickening siliconesHDK FUMED SILICA PROPERTIES AND APPLICATIONSHDK HYDROPHOBIC FUMED SILICA is.

7 Treated with a reactive silane to give water repellent characteristics Useful for thickening polar solvents and resins like alcohols, isocyanates, epoxies and urethanes Useful for reinforcing silicones without thickeningAdvantagesFumed SILICA provides performance advan-tages in many ways: Reinforcement improving strength in silicones and other polymers Rheology control Thickening tailored flow properties Sag resistance reduced sag of liquids and pastes Anti-settling prevents sedimentation and settling Thixotropy shear thinning viscosity profiles Free flow additive in powdersApplicationsFumed SILICA is widely used in.

8 Adhesives for rheology control Caulks and sealants for rheology con-trol and reinforcement Composites for rheology control Elastomers for reinforcement Food for free flow and anti-caking Paint, coatings and inks for rheology control and free flow in powder coatings Personal care for free flow in powders, rheology control in pastes and liquids and reinforcement Pharmaceutical for free flow and reinforcement in tablets6 FUMED SILICA is formed by the flame hydrolysis of silane at high tempera-tures. Primary particles of amorphous silicon dioxide, which do not exist out-side of the reactor, fuse together pro-ducing chain-like, branched aggregates.

9 These aggregates are the basic build-ing blocks of HDK which further form loosely bound agglomerates. HDK aggregates: Have an open, space-filling structure Have a high surface area Are highly interactive with a strong affinity to each otherThis enables HDK to impart many benefits such as reinforcement, free flow and rheology rheology control provided by HDK is an especially important benefit in many applications. When properly dispersed, HDK aggregates form a structure that gives body to a liquid medium. This struc- HDK Pyrogenic SILICA Formation in a Flame SiCl4 + 2H2 + O2 SiO2 + 4 HCl1200 1500 CPrimary particlesAggregatesAgglomeratesReactorFL AME PROCESS KEY TO VERSATILITY ture increases the viscosity to provide sag resistance and anti-settling subjected to shear forces, such as stirring, spraying or brushing, the network of HDK aggregates breaks down.

10 This reduces the viscosity for easy application. Once the shear is removed however, the network reforms and the liquid regains its original high viscosity. The amount of time it takes for this structure to rebuild depends on the type and amount of the HDK used and properties of the liquid such as the product, technical, or safety questions, please direct your inquiries to the Brenntag Solutions Group shown 's HDK FUMED SILICA pro-duct lines are represented as follows:BRENNTAG CompaniesBrenntag North AmericaUnited StatesBrenntag CanadaCanadaBrenntag Latin AmericaMexico, Central America, Caribbean, Colombia, Venezuela & Ecuador1003 Solutions Group.