| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: method is realised by adding the supplement to carbamide, where the supplement contains the carboxylic acid compound with the general formula XY-(Z)-COOH, where Z is the saturated or unsaturated hydrocarbon with 1-25 carbon atoms, and X and Y are chosen from the group that consists of the hydrogen atom or polar organic functional group, and where the supplement is added into the carbamide chip as a solution in the polar solvent, with the following drying. The polar solvent is preferably water. The concentration of the water solution of the carboxylic acid is 0.5-60 mass percent, preferably 0.5-30 mass percent; the temperature of the carbamide, when the water solution of carboxylic acid is added, is 30 - 90°C, preferably 40 - 70°C. ^ EFFECT: improved properties of carbamide chip, dust formation and foaming. ^ 13 cl, 5 dwg |
