Disclosed is an emulsion formed using, as an emulsifier, 0.01 to 30 parts by weight of a perfluoroalkylethyl phosphonic acid salt represented by the general formula: CnF2n+1CH2CH2P(O)(OM1)(OM2) [III] (M1: a hydrogen atom, ammonium salt, or organic amine salt, M2: an ammonium salt or organic amine salt, n: 1 to 6), based on 100 parts by weight of a perfluoropolyether oil represented by the general formula: RfO(C3F6O)p(C2F4O)q(CF2O)rRf' [I] (Rf and Rf': C1-C5 perfluoroalkyl groups, p+q+r: 2 to 200) or the general formula: F(CF2CF2CF2O)nCF2CF3 [II] (n: 2 to 100), or a perfluorocarbon compound. In spite of using, as an emulsifier, a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, the emulsion exhibits excellent emulsification stability, and therefore can be effectively used as a surface-treating agent, such as a. mold-releasing agent.
本发明公开了一种乳液,该乳液使用 0.01 至 30 重量份的
全氟烷基
乙基膦酸盐作为
乳化剂,该
全氟烷基
乙基膦酸盐由通式表示:CnF2n+1CH2CH2P(O)(OM1)(OM2)[III](M1:氢原子、
铵盐或有机胺盐,M2:
铵盐或有机胺盐,n:1 至 6),以 100 份(重量)通式为代表的
全氟聚醚油为基础:RfO(
C3F6O)p(
C2F4O)q(
CF2O)rRf'[I](Rf 和 Rf':C1-C5
全氟烷基,p+q+r:2 至 200)或通式:F(
CF2CF2CF2O)n
CF2CF3[II](n:2 至 100),或
全氟碳化合物。尽管使用了一种具有含 6 个或更少碳原子的
全氟烷基的化合物作为
乳化剂,据说这种化合物的
生物蓄积性较低,但乳液却表现出极佳的乳化稳定性,因此可以有效地用作表面处理剂,例如脱模剂。