| 摘要 |
A composition comprises (a) a water-insoluble, oil-soluble surface active agent of the formula (I> I X-Y-Z or a functional derivative thereof, wherein X- represents a saturated or unsaturated hydrocarbon chain containing from 30 to 500 carbon atoms, -Y- represents a succinic anhydride residue carried terminally upon the group X-, and -Z represents a hydrophilic group carried by the group -Y and the said agent is other than a branched polyester-polyethylene oxide compound prepared by reacting an alk(en)yl succinic anhydride with polyethylene oxide and (b) a surface active agent having a hydrophilic/tipophilic balance value of below 15 and selected from a sorbitan ester, an alkylene oxide condensate of a sorbitan ester and a salt of a dialkyl ester of sulpho succinic acid. The compositions are used as emulsifying agent for producing a water-in-oil emulsion of a water-soluble (co)polymer of acrylamide or acrylic acid.
|
