Method of emulsification using core-corona type microparticles

A method of emulsification of an oil phase in an aqueous continuous phase, comprising the steps of dispersing core-corona microparticles into the aqueous phase, adding the oil phase, and applying shearing force for a time sufficient to emulsify the resulting mixture, wherein:

• (A) the core-corona microparticles are obtained by radical co-polymerization of a polyethylene oxide macromonomer represented by chemical formula (1)
• wherein R1 is selected from the group consisting of H and alkyl groups having 1 to 3 carbon atoms, n is a number of 8 to 200, and X is selected from a group consisting of H and CH3;
• with at least one hydrophobic monomer selected from the group consisting of an acrylate monomer represented by chemical formula (2)
• wherein R2 is selected from the group consisting of H and alkyl groups having 1 to 3 carbon atoms, and R3 is a substituent that has an alkyl group having 1 to 12 carbon atoms, and
• with an acrylamide monomer represented by chemical formula
• wherein R4 is selected from the group consisting of H and alkyl groups having 1 to 3 carbon atoms, and R5 and R6 are independently selected from the group consisting of H and substituents that have an alkyl group having 1 to 18 carbon atoms;
• (B) the molar ratio of the polyethylene oxide macromonomer to the total amount of acrylate monomer and acrylamide monomer ranges from 1:10 to 1:250;
• (C) the radical co-polymerization is carried out in a mixture of water and one or more alcohols selected from the group consisting of ethanol, dipropylene glycol, 1,3-butylene glycol and isoprene glycol;
• and
• (D) the mass ratio of alcohols to water ranges from 9/1 to 1/9.