Patent ID: 8110284

Claim:
Microcapsules having a core material encapsulated within a microcapsular shell, said core material comprises at least one active ingredient, wherein the microcapsular shell comprises at least one inorganic polymer comprising polymerized precursors obtained by in-situ polymerization of said precursors in a pH in the range of 2 to 7; wherein the weight ratio of said precursors to said core material is in the range of 5/95 to 25/75 and wherein said precursors are selected from metal alkoxide monomers, semi-metal alkoxide monomers, metal ester monomers, semi-metal ester monomers and from monomers of the formula M(R) n (P) m , wherein M is a metallic or semi metallic element, R is a hydrolysable substituent, n is an integer from 2 to 6, P is a non polymerizable substituent and m is an integer from 0 to 6, a partially hydrolyzed and partially condensed polymer thereof, and any mixture thereof; and wherein the concentration of the core material based on total weight of the microcapsules is 96% to 99% w/w.