Patent ID: 9539553
Date: 2017-01-10
CPC Classifications: A61K,A61Q,B01F,C08F,C08L,C11B

Claim:
1. An oil-in-water Pickering emulsion comprising: a corona-core microgel emulsifying agent in an amount of 0.1-10 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 oil-in-water Pickering emulsion is formed by applying shearing force to a mixture of the corona-core microgel emulsifying agent, the oil phase ingredient, and the water phase ingredient; the corona-core microgel emulsifying agent is adsorbed onto oil drops of the oil phase ingredient dispersed in the water phase ingredient; and the corona-core microgel emulsifying agent is composed of a copolymer obtained by polymerizing polyethylene oxide macromonomers 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), and has a cross-link density of 0.5-100 wt %: (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