controlled release composition, method of breaking a liquid fracturing fluid, sprayable coating formulation, and method of coating a water soluble material in the form of granules with a sprayable formulation

摘要

The present invention describes a controlled release composition containing a water-active material in the form of granules having a protective bar coating capable of releasing the active material in water under predetermined release conditions, wherein the protective bar coating comprises a polymeric mixture. of two latex polymers, a method of preparing such a composition, a sprayable solution useful in preparing the composition, and the use of the composition for breaking a fracturing fluid.