| 摘要 |
PROBLEM TO BE SOLVED: To obtain a novel phosphate-based surfactant for emulsion polymerization which can improve the water resistance of synthetic resins and which can be easily obtained by reacting a polyoxyalkylene alkylcyclohexyl ether and a phosphorylating agent such as phosphoric anhydride. SOLUTION: A surfactant for emulsion polymerization contains a phosphate of the formula. R is a 6-12C alkyl group; A is an ethylene group and/or a propylene group (with the proviso that compounds with all A's being propylene groups are excluded); n is an integer of 1-50; l+m=3 and l is 1 or 2 and m is 1 or 2; and M is H, an alkali metal atom, an alkaline earth metal atom, an alkanolamine residue or NH4. Although the amount of this novel surfactant for emulsion polymerization to be used depends on the type of monomers, the surfactant is generally used in the range of 0.1-10 wt.% based on the total amount of the monomers and preferably in the range of 0.3-5 wt.% in view of effects and economics. Other anionic or nonionic surfactants may be concurrently used.
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