N,N-Dimethyl-1,3-propanediamine → SDM

Participants

Reaction Conditions

Reaction Steps

A solution of 250 g of copoly(styrene-maleic anhydride (commercially available from the Monsanto Chemical Company under the tradename of Lytron 810) in 2500 ml of dry dimethylformamide is made by stirring in a 5-liter flask, containing a reflux condenser, thermometer, stirrer, and dropping funnel. The mixture is heated to 110°C and 230 g of N,N-dimethyl-1,3-propanediamine is added slowly at a rate to keep the mixture boiling slightly. Polymer precipitates as a gummy mass at first but goes back into solution after about half of the amine is added. The condenser is replaced by a distillation column and about 500 ml of material is removed by distillation with stirring. The residue is cooled, precipitated in water, collected by filtration and air-dried at room temperature for 2 days. The solid is dissolved in acetone, and again precipitated in water and air-dried. Yield = 260 g of off-white, friable solid.

Provenance & Evidence