| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to method for obtaining tetraoxyalkyl-substituted ureas of general formula (I)where R is -(CH)-; -(CH)-. Method includes addition of diisocyanate to cooled solution of diethanolamine in chloroform in molar ratio of components 1:2, exposure of obtained mixture, filtration and drying of obtained product under pressure. Solution of diethanolamine with chloroform is preliminarily heated to 30°C, addition of diisocyanate is realised at cooling solution to 10-15°C, exposure of obtained mixture is carried out with mixing first for 1 hour at room temperature, then for 1 hour with heating to 30-35°C, filtration and drying of obtained product is carried out under pressure 0.5-1.5 kPa.EFFECT: method makes it possible to reduce process duration and expenditures for heating with preservation of high target product output.2 tbl, 2 ex |
