Patent ID: 7615093

Claim:
A controlled release product comprising: (a) a substrate material for release to a surrounding environment; (b) a composition coating the substrate material in a coating layer for providing a controlled release of the substrate material, the composition comprising: (i) an amount of a matrix material; (ii) an amount of a particulate fibrous filler material dispersed throughout the matrix material, wherein each of the particles of filler material is comprised of an external surface; and (iii) a water soluble surface treatment material applied to the external surfaces of the particles of filler material such that the surface treatment material provides degradable interfaces between the matrix material and the external surfaces of the particles of filler material, and wherein the degradable interfaces are degradable in the presence of water such that interfacial passageways between the matrix material and the external surfaces of the particles of filler material are formed by the dissolution of the surface treatment material.