| 摘要 |
The invention relates to a method for production of a solid pigment preparation in the form of granules by spray drying with the steps (a) atomisation in an atomisation device of a suspension containing (A0) 30 to 90 wt. % of a solvent component based on the total weight of the suspension, (A1) 2 to 60 wt. % of a pigment component based on the total weight of the suspension, (A2) 0 to 50 wt. % of a fist filler component based on the total weight of the suspension, (A3) 10 to 70 wt. % of a surface-active additive component based on the sum of the weights of components (A1) and (A2), and optionally further components wherein the sum of the weight fractions of all based or calculated on the total weight gives 100 wt.%, (b) bringing the droplets generated in step (a) in contact with a gas stream at a given temperature to dry the same to give granules with a given residual moisture content and (c)separation of the granules from the gas stream, characterised in that in step (b), before achieving the residual moisture content the droplets are at least partly exposed to an aerosol containing a second solid filler component and granules obtained by the above method. |
