Diethylenetriaminepentaacetic acid → HCID 20266241, compound

Participants

Reaction Steps

A water-in-oil emulsion of an acrylamide/dodecyl methacrylate copolymer is prepared by first dispersing 112.5 g of acrylamide and 0.09 g of the pentasodium salt of diethylenetriaminepentaacetic acid in 166.5 g of water to form the aqueous phase. The oil phase is made by dissolving 2.25 g of sorbitan monooleate, 3.3 g of isopropanolamide of oleic acid, and 12 g of dodecyl methacrylate in 103.2 g of Isopar® M (a liquid hydrocarbon). The aqueous phase is then added to the oil phase in a Waring blender operating at its highest speed. The resulting water-in-oil emulsion is transferred to a 500-ml resin pot equipped with an agitator and a N2 purge tube. After the pot is purged with nitrogen for one hour, 1 g of a 10 percent solution of diisopropyl peroxydicarbonate in Isopar® M, a preferred oil-soluble initiator is added to the emulsion at 20° C. while continuing the nitrogen purge and agitation of the emulsion. The temperature of the emulsion rises to 50° C. in 20 minutes and is maintained in the range of 40° C.-50° C. during the remainder of the polymerization (i.e., about 4 hours). The resulting water-in-oil emulsion of acrylamide/dodecyl methacrylate copolymer (32.5 percent polymer solids) is recovered from the resin pot.

Provenance & Evidence