(Object) It is to provide a surfactant composition for foamed sand having excellent rapid-foaming property of the foamed sand and improved strength of a mold when the mold such as a sand core or the like is produced by applying the foamed sand.
(Solution) The surfactant composition for a formed sand includes 80 to 99.8 mass% of a compound (A) represented by formula (1); 0.1 to 10 mass% of a compound (B) represented by formula (B); and 0.1 to 10 mass% of an amphoteric surfactant (C).
R1O-(EO)n-SO3M1 ··· (1)
(R 1 represents a hydrocarbon group having 6 to 22 carbons, EO represents oxyethylene group, n is 1 to 10, and M 1 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium.)
R2O-SO3M2 ···· (2)
(R2 represents a hydrocarbon group having 6 to 22 carbons, and M2 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium.)
(目的)提供一种用于发泡砂的表面活性剂组合物,该组合物具有优异的发泡砂快速发泡性能,并且在应用该发泡砂生产砂芯等模具时,可提高模具的强度。
(解决方案)用于成型砂的表面活性剂组合物包括 80 至 99.8 质量%的由式 (1) 表示的化合物 (A);0.1 至 10 质量%的由式 (B) 表示的化合物 (B);以及 0.1 至 10 质量%的两性表面活性剂 (C)。
R1O-(
EO)n-SO3M1 --- (1)
(R 1 代表具有 6 至 22 个碳原子的烃基,
EO 代表氧
乙烯基,n 为 1 至 10,M 1 代表碱
金属、碱土
金属、
铵或有机
铵)。
R2O-SO3M2 ---- (2)
(R2 代表具有 6 至 22 个碳原子的烃基,M2 代表碱
金属、碱土
金属、
铵或有机
铵)。