Patent ID: 9532933
Date: 2017-01-03
CPC Classifications: A61K,A61Q,B01J,C11D

Claim:
1. A process for preparing a silica microcapsule particle composition comprising the steps of: (a) preparing a mixture of a silica sol-gel precursor and an active material; (b) preparing a surfactant solution by dissolving a surfactant in water; (c) adding the silica sol-gel precursor and active material mixture obtained in step (a) to the surfactant solution obtained in step (b); (d) homogenizing the mixture of silica sol-gel precursor, active material and surfactant solution obtained in step (c); (e) curing the homogenized mixture to form silica microcapsule particles; and (f) modifying the silica microcapsule particles with a sphere complexation to form a silica microcapsule particle composition containing coated silica microcapsule particles, wherein the sphere complexation is a polyethyleneimine polymer, a lauryl ether sulfate, an inorganic zinc oxide, or a mixture thereof, and the sphere complexation is present at a level of 0.1% or greater by weight of the composition.