The puriss products of Neuburg Siliceous Earth are significantly finer than classic Sillitin. The extremely low residue of > 40 µm is further reduced in comparison with standard Sillitin. This also reduces the abrasion effect of this product series and protects processing equipment like mixers, tools and airless spray nozzles.
|
SILLITIN / SILLIKOLLOID |
PURISS | |
| Residue > 40 µm | 20 - 25 mg/kg | 8 mg/kg |
The dispersion properties in low-viscosity systems are also greatly improved. These effects are achieved in a process after the usual processing steps. Puriss products are therefore ideal for thin-walled articles and all applications requiring an excellent surface quality, likewise for paints and varnishes, elastomers or plastics.
It was soaked in ester plasticizer until no agglomerates > 20 μm were found (blade mixer at 1200 rpm, 20 % filler concentration). The dispersion time defined in this way is a measure for assessing dispersion behavior. The superb, fast dispersion of the puriss versions has a particularly marked effect with low gravities, such as those that occur in very soft mixtures containing a high level of softeners.
