本發明係關於一種由(a)一連續水相；(b)一油相；及(c)一兩性分子乳化系統所組成的合成物，該乳化系統為一種符合(A)p -(B)q -(C)r 化學式的團聯共聚物。其中(B)q 為親水基而(C)r 為疏水基；p 、q 和r 皆為整數，且如果p 為0，則A必須不為羥基或反應官能基，而團聯共聚物為兩團聯共聚物；B和C則各為重覆單元；如果p 大於1，則該團聯共聚物為三團聯共聚物，其(A)p 為疏水基；而疏水基(A)p 和(C)r 各為均聚物或異聚物，重覆的A和C可以是相同或相異的單元；且其中q /(p +r )的比例需夠高，以使該團聯共聚物的親水親脂平衡值能夠大於10。A composition comprises (a) a continuous aqueous phase; (b) an oily phase; and (c) an amphiphilic emulsifying system comprising a block copolymer having the formula (A)p -(B)q -(C)r , in which (B)q is a hydrophilic block and (C)r is a hydrophobic block; wherein p, q and r are integers with the proviso that: ifp is 0, then A is other than hydroxyl or reactive functional groups and the block copolymer is a diblock copolymer; B and C are each individual repeating units; ifp is >1, then the block copolymer is a triblock copolymer, in which (A)p is a hydrophobic block; the hydrophobic blocks (A)p and (C)r are each homopolymers or heteropolymers; the repeating units A and C are the same or different; and wherein the ratioq /(p +r ) is sufficient high so that the hydrophiliclipophilic balance value of the block copolymer is >10.
