The present invention relates to an aqueous dispersion of multiphase polymer particles, wherein the polymer particles comprise two or more different phases, the inner phase is formed by polymerization in the presence of a crosslinking agent, and the dispersion is an interface selected from amino acid derivatives. Further comprising an active agent. The invention also relates to a film-forming composition comprising an aqueous dispersion of the polymer particles. The invention further relates to a film obtained after application of the film-forming composition. This film dries very quickly, is water resistant, and has high adhesion, flexibility, and breaking strength properties. The invention also relates to the use of the membrane for the protection of skin, mucous membranes, wounds, injuries and / or skin diseases. [Selection figure] None本発明は多相ポリマー粒子の水性分散液に関し、ポリマー粒子が、2以上の異なる相を含み、内側相は架橋剤の存在下で重合により形成され、該分散液はアミノ酸誘導体から選択される界面活性剤を更に含む。本発明はまた、該ポリマー粒子の水性分散液を含む膜形成組成物に関する。本発明は更に、該膜形成組成物の適用後に得られる膜に関する。この膜は乾燥が非常に速く、耐水性で、高い接着性、柔軟性、及び破断強度特性を有する。本発明はまた、皮膚、粘膜、創傷、負傷、及び/又は皮膚疾患の保護のための該膜の使用に関する。【選択図】なし