PROBLEM TO BE SOLVED: To provide a composition for nanoemulsion emulsification capable of being used for preparation of an oil-in-water type emulsion containing a polymer nanosphere capable of increasing the amount of an included oily component.SOLUTION: There is provided a composition for nanoemulsion emulsification consisting of following (A) component to (D) component with mass percentage of each component satisfying following conditions. (A)/(B)=0.1 to 0.7. (C)/[(A)+(B)]=3 to 8. (D)/[(A)+(B)]=0.2 to 1.2. (A) component: a copolymer consisting of a constitutional unit (a1) and a constitutional unit (a2) described in the claim 1, molar ratio of constitutional units (a1):(a2) of 40:60 to 80:20 and weight average molecular weight of 5,000 to 5,000,000. (B) component: a non-ionic surfactant having HLB value of 10 to 16. (C) component: polyvalent alcohol. (D) component: water.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】内包される油性成分の量を増加させることができるポリマーナノスフィアを含む水中油型エマルションの調製に用いることができるナノエマルション乳化用組成物の提供。【解決手段】下記の(A)成分~(D)成分からなり、各成分の質量比率が下記の条件を満たすナノエマルション乳化用組成物。 (A)/(B)=0.1~0.7 (C)/〔(A)+(B)〕=3~8 (D)/〔(A)+(B)〕=0.2~1.2 (A)成分:請求項1に記載の構成単位(a1)および構成単位(a2)からなり、構成単位(a1):(a2)のモル比が40:60~80:20であり、重量平均分子量が5,000~5,000,000である共重合体 (B)成分:HLB値が10~16である非イオン性界面活性剤 (C)成分:多価アルコール (D)成分:水【選択図】なし
