Patent ID: 8067089
Filing Date: 2011-11-29
Classification: A61K,A61Q,Y10T

Abstract:
1. A population of microcapsule particles comprising an oil soluble or dispersible core material and a non-anionic wall material at least partially surrounding the core material, the microcapsule wall material consisting of: the reaction product of a first composition in the presence of a second composition consisting of an emulsifier which is non-anionic, the first composition consisting of a reaction product of i) an oil soluble or dispersible amine acrylate or methacrylate with ii) a multifunctional acrylate or methacrylate monomer or oligomer, and iii) a soluble acid and an initiator, wherein the ratio of amine acrylate or methacrylate to multifunctional acrylate or methacrylate is from 0.1:99.9 to 10:90 by weight, wherein the soluble acid and the amine acrylate are in a molar proportion from 3:1 to 1:3 and together have a percent by weight as compared to the weight of the wall material of from 0.1 to 20%, the non-anionic emulsifier comprising a water soluble or dispersible material at a pH from 4 to 12, and optionally a water phase initiator, whereby the reaction product of the first composition and second composition results in the formation of a population of microcapsules having a non-anionic microcapsule wall material of low permeance to the core material and having a zeta potential of −5 millivolts or greater, the resulting microcapsules having adherence to anionic surfaces.