申请人:The University of Liverpool
公开号:US10463618B2
公开(公告)日:2019-11-05
An oil-in-water emulsion comprises an emulsifier which is a non-gelled branched polymer (e.g. a branched vinyl polymer), wherein the ends of at least some of the chains of said polymer terminate in an alkyl chain of 5 carbon atoms or more, and wherein the oil-in-water emulsion takes the form of particles having a z-average diameter of no greater than about 1000 nm. This is useful in, for example, facilitating the carrying of hydrophobic materials within aqueous systems, to enhance oral drug delivery. The oil-in-water emulsion may be prepared by mixing an oil phase with an aqueous phase in the presence of an emulsifier, wherein said emulsifier is a non-gelled branched polymer, wherein the ends of at least some of the chains of said polymer terminate in an alkyl chain of 5 carbon atoms or more, and wherein the oil-in-water emulsion takes the form of particles having a z-average diameter of no greater than about 1000 nm. The oil phase may comprise a further solvent which is miscible with the oil, said solvent being allowed to evaporate to produce the final emulsion.
水包油型乳液包括一种乳化剂,它是一种非胶凝支链聚合物(如支链乙烯基聚合物),其中至少有一些聚合物链的末端以 5 个碳原子或更多的烷基链为端点,水包油型乳液呈颗粒状,其 z 平均直径不大于约 1000 nm。例如,这有利于在水性体系中携带疏水性材料,从而提高口服给药效果。水包油乳剂可以通过在乳化剂存在的情况下将油相与水相混合来制备,其中所述乳化剂是一种非胶凝支链聚合物,所述聚合物的至少一些链的末端终止于 5 个碳原子或更多的烷基链,并且水包油乳剂呈颗粒形式,其 z 平均直径不大于约 1000 nm。油相可包括另一种与油混溶的溶剂,让所述溶剂蒸发以产生最终乳液。