| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface active agent composition for emulsion polymerization easily solble in water even at a normal temperature, excellent in monomer emulsifying capability, high in chemical stability in the polymer emulsion after polymerization, and to provide an emulsion polymerization method for vinyl monomers. SOLUTION: The surface active agent composition for emulsion polymerization contains the compound described by the formula (I), with the compound occupying 50 wt.% or more in the anionic surface active agent component. The emulsion polymerization method for vinyl monomers uses this surface active agent composition for emulsion polymerization. (In the formula (I), x and y denote integers of zero or more, respectively, and x+y=8. EO denotes an oxyethylene group, and n is a 5-100 number representing the mean mol number of the oxyethylene group to be added).
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