Patent ID: 7041304

Claim:
A method for stabilizing an active ingredient by loading within thermotropic liquid crystal polymer microcapsules prepared by a method comprising the following steps of: (1) dissolving a thermotropic liquid crystal selected from the group consisting of cholesterol and cholesteryl derivatives and a monomer in a solvent and then adding an initiator thereto; (2) emulsifying the solution of step (1) in aqueous phase in the presence of a dispersion stabilizer; and (3) suspension polymerizing the emulsion of step (2) in the presence of a polymerization inhibitor, to give thermotropic liquid crystal polymer microcapsules having a structure of liquid crystal material surrounded by polymer; wherein a crosslinkable copolymer is obtained by copolymerizing said monomer of step (1) and a monomer having a crosslinkable functional group, and wherein said crosslinkable functional group is selected from the group consisting of trichlorovinylsilane, trimethoxyvinylsilane, triethoxyvinylsilane, vinyltriisopropoxysilane, vinyl tri-t-butoxysilane, vinyltriphenoxysilane, vinyltriacetoxysilane, vinyl tri (isobutoxy)silane, vinyltri (2-methoxyethoxy)silane, 8-oct-1-enyltrichlorosilane, 8-oct-1-enyltrimethoxysilane, 8-oct-1-enyltriethoxysilane, 6-hex-1-enyltrichlorosilane and 6-hex-1-enyltriethoxysilane; wherein the active ingredient is firstly stabilized in the thermotropic liquid crystal polymer microcapsules by fixation by molecular arrangement within the liquid crystal polymer microcapsules and doubly stabilized by polymer surrounding the liquid crystals in thermotropic liquid crystal polymer microcapsules.