Patent ID: 11260360

Abstract:
An improved process of making a benefit agent delivery particle and an improved microcapsule made by such process are disclosed. The process comprises the steps of providing a first composition of water phase 1, water phase 2, water phase 3 and an oil phase, where a water phase multifunctional (meth)acrylate monomer is selected to have a hydrophilicity index of least 25, or even at least 30 and the oil phase multifunctional (meth)acrylate monomer has a hydrophilicity index of 25 or less, or even 20 or less. The water phases comprise water, initiator, a water-soluble or dispersible amine(meth)acrylate or hydroxyl(meth)acrylate, a multifunctional (meth)acrylate and one water phase comprises water, carboxyalkyl(meth)acrylate and a base or quaternary ammonium acrylate. Water phases are combined to prereact the hydroxy- or amine(meth)acrylate and the multifunctional (meth)acrylate to form a multifunctional hydroxyl-amine(meth)acrylate pre-polymer. The pre-polymer is combined with the remaining water phase and an emulsion is formed by emulsifying under high shear agitation, an oil phase comprising a multifunctional (meth)acrylate monomer and a benefit agent core material thereby forming a wall surrounding the benefit agent core material.