Overview
Many pesticide formulations are adversely affected by moisture, humidity, the presence of viscous liquids, and static charge. The caking, clumping, and loss of free flow that result can render a formulation inefficient, difficult to handle and virtually impossible to disperse.  Purasil performance silicas can be used in pesticide formulations to eliminate these adverse effects.

During manufacture, many wettable powders cake, bridge, or stick to processing equipment. Frequently poor flow of powdered products results in packaging problems. Our silicas improve flow through processing and packaging equipment by acting as grinding and milling aids, improving the flow properties of the substrate, controlling relative humidity during the process and reducing build-up of the product due to static charge. PCL silicas can also be used to clean or purge conveyor, screw or spray drier systems.

Applications:
Grinding Aids | Suspension, Resuspension, Dispersibility | Parting Agents - Free Flow | Carriers | Moisture Absorbents | High Performing Crop Protection Products

Grinding Aids

Many products have a tendency to re-agglomerate immediately after milling. The use of Purasil 300 and Purasil 200 as a grinding aid can prevent this. Thus wettable powders do not cake in mills, clog screens or conveying systems and, more important, the milled product maintains the desire size and does not cake in storage.
 
Suspension, Resuspension, Dispersibility
The improved free flow properties imparted to the powdered substrate by the conditioner in conjunction with the hydrophilic nature of the PCL products results in improved wettability of the conditioned substrate. These synergistic properties provide fast, lump-free dispersion, prevent hard settling during storage and make resuspension easier.

Parting Agents - Free Flow
The fine particle size of  Purasil 100L and Purasil PS200 gives a sufficient number of particles to coat the surface of the substrate. This coating maintains separation of the particles of a wettable powder. This parting action promotes free flow and prevents caking of the substrate.

Carriers
Because of their high liquid absorptive capacity, PCL synthetic silicas are used in turning liquid active ingredients into wettable powders and water dispersible granules (WDGs). Once such liquid materials are turned into powder form, they can be handled and metered accurately, with no caking or bridging. In addition, the hydrophilic nature of the surface results in a quantitative release of ingredients in use when added to water since water has a greater affinity than other liquids for the silica surface.

Moisture Absorbents
Most formulations are sensitive to moisture and contain ingredients which have critical humidity levels: humidities below which they do not absorb moisture, and above which they absorb moisture and cake. Our silicas absorb moisture over a wide range of humidities and thus protect moisture sensitive formulations by preferentially absorbing the moisture. This unique property of silicas and sodium aluminosilicates affords moisture protection to wettable powder formulations over a wide range of exposure conditions.

Overview PCL's High Performing Crop Protection Products
PCL's high performance crop protection products offer excellent stability, suspendability, improved rheological properties and superior wetting properties, all without adverse viscosity effects. PCL offers a diverse product line for crop protection, providing a wide variety of particle sizes, handling characteristics and absorptive capacities. We look forward to working with you on your next formulation.