反应详情

A solution of 80 g IBMA, 100 g AMD, and 20 g dimethylaminopropyl methacrylamide (DMAPMA) in 600 ml of isopropyl alcohol and 450 ml of water is heated to 60° C. Sodium bicarbonate (3.5 g) is added to buffer the pH followed by solutions of sodium metabisulfite and ammonium persulfate (each 5.0 g in 15 ml of water). The resulting exothermic reaction is controlled by a cooling bath as needed. After the exotherm has ceased, heating is applied to keep the reaction mixture at reflux temperature (83° C.) for 30 minute after which isopropanol is distilled off until the reaction temperature has reached 90° C. Water is removed by evaporation under reduced pressure to give a 45-50% solution of polymer. The reaction mixture is cooled and adjusted to pH7. The material obtained has an average molecular weight of 7,000 and a surface tension of 35 dynes/cm as a 1.0% aqueous solution.

1. customThe resulting exothermic reaction
2. customis controlled by a cooling bath
3. temperatureheating
4. distillationis distilled off until the reaction temperature
5. customhas reached 90° C
6. customWater is removed by evaporation under reduced pressure