| 摘要 |
PROBLEM TO BE SOLVED: To obtain a surfactant composition for emulsion polymerization which is excellent in stability at the time of polymerization and in the mechanical stability of emulsion and has small particle diameter and low viscosity. SOLUTION: This surfactant composition for emulsion polymerization is obtained by including, as the essential components, (a) a compound shown in general formula I with a critical micell concentration(CMC) in the range of 0.005 to 0.1 molL-1 and (b) a compound shown in general formula II [R2O-(A3O)r- SO3M3] with a CMC in the range of 1×10-5 to 0.02 molL-1; the molar ratio of the component (a) to the component b: a/b=(5:95) to (75/25). (In the above formulas, R1 is a bivalent aliphatic hydrocarbon group or the like; R2 is a univalent aliphatic hydrocarbon group; A1, A2 and A3 are each a 2-4C alkylene group; p and r are each 1-50; q is 0-50; and M1, M2 and M3 are each a univalent cation).
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