| abstract |
The present invention provides a reactive surfactant composition for producing a polymer emulsion having good stability without making the particle diameter coarse. That is, the present invention provides a reactive surfactant composition comprising (a) a reactive surfactant having one reactive group selected from the group of a vinyl group, an allyl group and a group having the formula (1) and one anionic hydrophilic group in the molecule thereof, having a critical micelle concentration (CMC) in the range between 0.007 mol/L and 0.4 mol/L and (b) a reactive surfactant having one reactive group selected therefrom and one anionic hydrophilic group in the molecule thereof, having CMC in the range between 1×10 −5 mol/L and less than 0.007 mol/L, at a molar ratio of (a) to (b) in the range between 5/95 and 60/40: n n n in which R 1 and R 2 are —H or —CH 2 X and are not the same as each other, X is —H or a substituent, Y is carbonyl group or methylene group and p is zero or 1; use of the surfactant composition as defined above as an emulsifier for emulsion polymerization; a method of conducting an emulsion polymerization in the presence of the surfactant composition as defined above; a paint composition comprising a pigment and the polymer emulsion obtained by the method as defined above. |