Polymeric flocculants cross-linked

Properties of Dispersions and Polymers. All polymer dispersions with SDS (sodium dodecyl sulfate) as an emulsifier were stable for at least 8 months. Dispersions with Na laurate as emulsifier flocculated after a short time. Polyacrylates on drying yielded clear and coherent films polystyrene and PMMA dispersions gave opaque and brittle layers. The doses needed for polymerization were well below a dose which causes cross linking or degradation. 

Many creative methods for modifying polyacrylamides formed by inverse emulsion polymerization for enhanced activity in target applications are found in the patent literature. Flesher reported the synthesis of a cross-linked, water swellable polymer, useful for flocculation in high shear dewatering devices, by adding a small amount of a divinylic cross-linking agent [10]. 

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