Dispersing Fumed Silica

Dispersing Fumed Silica

Sonic’s unique Sonolator homogenizer has been used extensively for dispersing fumed silica into various components such as resin, glycol, water and more to produce paper and film coatings, defoamers, binders, cosmetic thickening agents, and more.  Depending on whether a liquid is polar or non-polar, shear will help either decrease or increase viscosity. In many applications, the fumed silica is used as a thickening agent and the degree of homogenization will determine just how well the silica particles bond to one another to form an effective lattice network.

Uses Across the Industrial and Consumer Spectrum

Fumed silica serves as a universal viscosity builder and an anticaking agent (free-flow agent) in powders. It is used in cosmetics for its light-diffusing properties. It is used as a light abrasive, in products like toothpaste. Other uses include filler in silicone elastomers and viscosity adjustment in paints, coatings, printing inks, adhesives and unsaturated polyester resins. It is also used in the production of cat litter box filler and as a core material in the production of vacuum insulated panels

custom pumping skid

Sonic Mixing Systems for Dispersing Fumed Silica

The Sonolator very effectively disperses and homogenizes fumed silica liquid slurries, and usually at much lower pressures than the 5,000 psi often suggested.  The Sonolator, for example, will disperse fumed silica into polyester resins, generating the desired thixotropic index while eliminating gel agglomeration, at only 500 psi!  Our systems use a PD pump to force the silica premix through a specially engineered Orifice, generating pressure and cavitation.  The mix then exits the Orifice at extremely high velocity, striking a blade in its path that helps generate excessive cavitation.  The fluid acceleration, cavitation and pressure work together to significantly reduce silica agglomerates, thereby improving thix index and product stability and appearance.

Comprehensive Equipment, Instrumentation and Controls

Our comprehensive systems include a PD pump and our Sonolator dispersion device along with instrumentation and controls. When the fluid slurry is forced through the Sonolator dispersion chamber, the acceleration and cavitation inside violently rips solid agglomerates apart, forcing smaller particles into a uniform suspension. Many applications involve the use of polyester resins and other flammable fluids, so our systems can be designed with XP rated controls to meet class 1 div 1 and div 2 areas. The systems are customized to meet your standards and include 3D layout approval drawings. We also provide electrical VFD and PLC cabinets for automated operations of the skid. Read more about customization experience HERE

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