Provided is a raw material for cosmetics； it can conveniently prepare cosmetics having stability, excellent feeling of use, and without skin irritation. The raw material for cosmetics according to the present invention includes a core-corona type microgel dispersion obtained by the radical polymerization of a polyethylene oxide macromonomers represented by the following formula (1), a hydrophobic monomer represented by the following formula (2), and a crosslinking monomer represented by the following formula (3) under the following conditions (A) ~ (E), (A) the charged molar quantity of the polyethylene oxide macromonomer / the charged molar quantity of the hydrophobic monomer, expressed by the molar ratio is 1: 10 to 1: 250. (B) the charged amount of the crosslinking monomer relating to the charged amount of the hydrophobic monomer, is 0.1 to 1.5% by mass. (C) the hydrophobic monomer represented by the following formula (2) has a monomer composition obtained by mixing one or more methacrylic acid derivatives having an alkyl group of 1 to 8 carbon atoms. (D) the polymerization solvent is water-polyol mixed solvent, the polyol is one or more selected from dipropylene glycol, 1,3-butylene glycol and isoprene glycol. (E) the solvent composition of the water-polyol mixed solvent has a mass ratio at 20℃, water: polyol = 90 ~ 10:10~90. R1 represents an alkyl group having 1 to 3 carbon atoms, n is a number from 8 to 200. X represents H or CH3. R2 represents an alkyl group having 1 to 3 carbon atoms, R3 represents an alkyl group having 1 to 12 carbon atoms. R4 and R5 each independently represent an alkyl group having 1 to 3 carbon atoms, m is a number of 0 to 2本發明提供可供簡單地製造安定性、使用感優越，對皮膚無刺激性之化妝料的化妝料用原料。本發明相關之化妝料用原料之特徵為包含：將下述式(1)表示之聚氧乙烯巨分子單體、下述式(2)表示之疏水性單體及下述式(3)表示之交聯性單體以下述(A)至(E)之條件進行自由基聚合而獲得之核-冠型微凝膠分散液：(A)以上述聚氧乙烯巨分子單體之置入莫耳量/上述疏水性單體之置入莫耳量表示之莫耳比為1：10至1：250。(B)對於上述疏水性單體之置入量，上述交聯性單體之置入量為0.1至1.5質量%。(C)下述式(2)表示之疏水性單體為將1種或2種以上具有碳數1至8之烷基之甲基丙烯酸衍生物混合之單體組成。(D)
