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.
一种油包
水乳液包括一种
乳化剂,该
乳化剂是非明胶化的分支聚合物(例如,分支
乙烯聚合物),其中该聚合物的至少一些链的末端终止于具有5个碳原子或更多的烷基链,且该油包
水乳液呈现出粒子形态,其Z平均直径不大于约1000纳米。例如,在促进疏
水材料在
水系中的携带方面非常有用,以增强口服药物的输送。油包
水乳液可以通过在存在
乳化剂的情况下混合油相和
水相来制备,其中所述
乳化剂是非明胶化的分支聚合物,该聚合物的至少一些链的末端终止于具有5个碳原子或更多的烷基链,并且该油包
水乳液呈现出粒子形态,其Z平均直径不大于约1000纳米。油相可以包括与油相互溶的进一步溶剂,允许该溶剂蒸发以产生最终的乳液。