A production method of raw material for cosmetics consisting of a core-corona type microgel dispersion comprising: the step of the radical polymerization of: a polyethylene oxide macromonomer having chemical formula, a hydrophobic monomer having chemical formula, and a cross-linking monomer having chemical formula, wherein the mole ratio of the feed mole amount of said polyethylene oxide/the feed mole amount of the hydrophobic monomers is in the range of from 1:10 to 1:250 (mole/mole), said cross-linking monomers is in the range of 0.1 to 1.5 % by weight relative to said hydrophobic monomers, said hydrophobic monomer is a monomer composition comprising at least one methacrylic acid selected from the group consisting of methacrylic acid derivatives that have alkyl groups having 1 to 8 carbon atoms, solvent used for polymerization is a mixed solvent of water and polyol that is at least one polyol selected from the group consisting of dipropylene glycol, 1,3-butylene glycol, and isoprene glycol, and said mixed solvent of water and polyol has water versus said polyol ratio that is in the range of 90/10 to 10/90 % by mass at 20 °C; and further wherein wherein R 1 is an alkyl group having 1 to 3 carbon atoms, and n is a number of 8 to 200 and X is H or CH 3. wherein R 2 is an alkyl group having 1 to 3 carbon atoms, and R 3 is an alkyl group having 1 to 12 carbon atoms. wherein R 4 and R 5 are respectively independent alkyl groups having 1 to 3 carbon atoms, and m is a number of 0 to 2. a polyethylene oxide macromonomer having chemical formula, a hydrophobic monomer having chemical formula, and a cross-linking monomer having chemical formula, wherein the mole ratio of the feed mole amount of said polyethylene oxide/the feed mole amount of the hydrophobic monomers is in the range of from 1:10 to 1:250 (mole/mole), said cross-linking monomers is in the range of 0.1 to 1.5 % by weight relative to said hydrophobic monomers, said hydrophobic monomer is a monomer composition comprising at least one methacrylic acid selected from the group consisting of methacrylic acid derivatives that have alkyl groups having 1 to 8 carbon atoms, solvent used for polymerization is a mixed solvent of water and polyol that is at least one polyol selected from the group consisting of dipropylene glycol, 1,3-butylene glycol, and isoprene glycol, and said mixed solvent of water and polyol has water versus said polyol ratio that is in the range of 90/10 to 10/90 % by mass at 20 °C; and further wherein wherein R 1 is an alkyl group having 1 to 3 carbon atoms, and n is a number of 8 to 200 and X is H or CH 3. wherein R 2 is an alkyl group having 1 to 3 carbon atoms, and R 3 is an alkyl group having 1 to 12 carbon atoms. wherein R 4 and R 5 are respectively independent alkyl groups having 1 to 3 carbon atoms, and m is a number of 0 to 2. the mole ratio of the feed mole amount of said polyethylene oxide/the feed mole amount of the hydrophobic monomers is in the range of from 1:10 to 1:250 (mole/mole), said cross-linking monomers is in the range of 0.1 to 1.5 % by weight relative to said hydrophobic monomers, said hydrophobic monomer is a monomer composition comprising at least one methacrylic acid selected from the group consisting of methacrylic acid derivatives that have alkyl groups having 1 to 8 carbon atoms, solvent used for polymerization is a mixed solvent of water and polyol that is at least one polyol selected from the group consisting of dipropylene glycol, 1,3-butylene glycol, and isoprene glycol, and said mixed solvent of water and polyol has water versus said polyol ratio that is in the range of 90/10 to 10/90 % by mass at 20 °C; and further wherein wherein R 1 is an alkyl group having 1 to 3 carbon atoms, and n is a number of 8 to 200 and X is H or CH 3. wherein R 2 is an alkyl group having 1 to 3 carbon atoms, and R 3 is an alkyl group having 1 to 12 carbon atoms. wherein R 4 and R 5 are respectively independent alkyl groups having 1 to 3 carbon atoms, and m is a number of 0 to 2.