Patent ID: 7189275

Claim:
A composition for providing a controlled release of a substrate material, the composition comprising: (a) an amount of a matrix material, wherein the matrix material is comprised of the substrate material for release to a surrounding environment; (b) an amount of a particulate fibrous filler material dispersed throughout the matrix material such that the filler material is dispersed throughout the substrate material, wherein each of the particles of filler material is comprised of an external surface; and (c) 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.