Takahashi Yutaka, Shirahata Hiroka, Nishimura Taishi, Murai Masaki, Wakita Kazuaki, Kondo Yukishige
Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science.
Oleo & Specialty Chemicals Research Lab, NOF CORPORATION.
J Oleo Sci. 2018 May 1;67(5):531-537. doi: 10.5650/jos.ess17161. Epub 2018 Apr 9.
Amphiphilic random copolymers, poly(oxyethylene)/poly(oxypropylene) butyl ethers (C4EmPn), have been used as raw materials for cosmetics. This paper reports on the influence of amphiphilic random copolymers on mixtures of n-decane, water, and a nonionic surfactant, hexa(oxyethylene) dodecyl ether (C12E6). Bicontinuous phases are formed from decane/water/C12E6 mixtures at high C12E6 weight fractions (> 70 wt%). Adding C4EmPn to decane/water/C12E6 mixtures brings about the formation of bicontinuous phases and a decrease in the amount of the surfactant required for their formation, indicating efficiency boosting. The bicontinuous phase formation region in the phase diagram of the decane/water/C12E6+C4E5P5 system is largest at a specific C4E5P5 weight fraction in the C12E6/C4E5P5 mixture. When a hydrophobic polymer, in which the poly(ethylene oxide) group in C4EmPn is absent, is added to decane/water/C12E6 mixtures, no efficiency boosting is observed. These results suggest that the adjustment of the hydrophilicity-hydrophobicity balance of C12E6/C4EmPn mixture causes the efficiency boosting.
两亲性无规共聚物，聚（氧化乙烯）/聚（氧化丙烯）丁醚（C4EmPn），已被用作化妆品的原料。本文报道了两亲性无规共聚物对正癸烷、水和非离子表面活性剂六（氧化乙烯）十二烷基醚（C12E6）混合物的影响。在高C12E6重量分数（>70 wt%）下，由癸烷/水/C12E6混合物形成双连续相。向癸烷/水/C12E6混合物中添加C4EmPn会导致双连续相的形成，并减少形成它们所需的表面活性剂的量，表明效率提高。在C12E6/C4E5P5混合物中，在特定的C4E5P5重量分数下，癸烷/水/C12E6 + C4E5P5体系相图中的双连续相形成区域最大。当将不含C4EmPn中聚（环氧乙烷）基团的疏水性聚合物添加到癸烷/水/C12E6混合物中时，未观察到效率提高。这些结果表明，C12E6/C4EmPn混合物的亲水-疏水平衡的调节导致了效率提高。
