US Patent 9708562 Rapidly inverting water-in-oil polymer emulsions

The present invention relates to formulations comprising an inversion facilitator additive and an active emulsion polymer, and methods for their use. The formulation can comprise a water-in-oil emulsion having the active emulsion polymer in an aqueous phase of the water-in-oil emulsion. The active emulsion polymer can be a friction-reducing polymer, a flocculant polymer, or any other polymer suitable for delivery within the aqueous phase of the water-in-oil emulsion.