| 摘要 |
<p>The present invention provides an O/W emulsified composition excellent in formulation stability, feeling in use, and UV protection ability. The emulsified composition according to the present invention is an O/W emulsified composition, wherein (i) a first oil phase and (ii) a second oil phase are dispersed separately in an aqueous phase,
(i) the first oil phase having average particle size of 700 nm or less, comprising an organic UV absorber, and being formed with, as an emulsifier, a polyoxyethylene/polyoxyalkylene alkyl ether block polymer represented by formula (1) or (2):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 1 O-(PO)m-(EO)n-H€ƒ€ƒ€ƒ€ƒ€ƒ(1)
wherein R 1 is a hydrocarbon group having 16 to 18 carbon atoms; PO is an oxypropylene group, EO is an oxyethylene group, and PO and EO are added to each other in block form; and m and n respectively represent average addition mole number of PO and EO, 70>m>4, 70>n>10, and n>m; and
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 2 O-(AO)p-(EO)q-R 3 €ƒ€ƒ€ƒ€ƒ€ƒ(2)
wherein R 2 and R 3 are either identical to or different from each other, and each of them is a hydrocarbon group having 1 to 4 carbon atoms; AO is an oxyalkylene group having 3 to 4 carbon atoms, EO is an oxyethylene group, and AO and EO are added to each other in block form; and p and q respectively represent average addition mole number ofAO and EO, 1‰¤p‰¤70, 1‰¤q‰¤70, and 0.2<(q/(p + q))<0.8, and
(ii) the second oil phase comprising a silicone oil and being formed with, as an emulsifier, an alkyl-modified carboxyvinyl polymer.</p> |
