Thermotropic liquid crystal microcapsules for the stabilization of water-insoluble active ingredients by liquid crystal association stabilization system LASS and the process for preparing the same and the cosmetic composition containing the microcapsules

摘要

PURPOSE: Liquid crystal cross linked polymer microcapsules capable of completely stabilizing water-insoluble active ingredients, a process for preparing the capsules, a method for stabilizing the active ingredients using the liquid crystal capsules, and a cosmetic composition for retaining the active ingredients for a long time by containing the microcapsules are provided. CONSTITUTION: The process for preparing liquid crystal cross linked polymer microcapsules comprises a step (a) of polymerizing polymer having crosslinkable functional groups by polymerizing monomer having crosslinkable functional groups and monomer capable of radical polymerization; a step (b) of uniformly dissolving thermotropic liquid crystal, hydrophobic monomer and the polymer having crosslinkable functional groups prepared in the step (a) into organic solvent, emulsifying the solution in an aqueous solution in which dispersion stabilizer having a proper concentration is dissolved, and adding initiator and polymerization inhibitor to the emulsified solution, thereby polymerizing the emulsified solution so that thermotropic liquid crystal polymer microcapsules are manufactured; a step (c) of collecting water-insoluble active ingredients into the capsules; and a step (d) of cross linking the water-insoluble active ingredients collected liquid crystal polymer microcapsules, wherein 0.1 to 50 wt.% of the monomer having crosslinkable functional groups for the total weight of the polymer is used in the step (a) of polymerizing polymer having crosslinkable functional groups.