Patent ID: 9539554
Date: 2017-01-10
CPC Classifications: A61K,A61Q,B01F,C08F,C08L,C11B

Claim:
1. A method of preparing an oil-in-water Pickering emulsion comprising a corona-core microgel emulsifying agent in an amount of 0.1-3 wt % of the total amount of the oil-in-water Pickering emulsion, an oil phase ingredient in an amount of 10-80 wt % of the total amount of the oil-in-water Pickering emulsion, and a water phase ingredient, wherein the corona-core microgel emulsifying agent is composed of a copolymer obtained by polymerizing polyethylene oxide macromononiers of the following formula (1), hydrophobic monomers of the following formula (2), and cross-linking monomers of the following formula (3) under the following conditions (A) and (B): (A) a mole ratio of a feed mole amount of said polyethylene oxide macromonomers/a feed mole amount of the hydrophobic monomers is 1:10-1:250; and (B) a feed amount of said cross-linking monomers is 0.1-1.5 wt % relative to a feed amount of said hydrophobic monomers; R R R wherein a core part is cross-linked with cross-linking monomers to prepare the microgel by using polymer fine particle polymerization method; the method comprising the steps of: mixing and dispersing the corona-core microgel emulsifying agent in water or the water phase ingredient to form a dispersion; adding the oil phase ingredient to the dispersion to form a mixture; and emulsifying the mixture by stirring and applying shearing force.