| 摘要 |
The invention relates to a process for preparing organic pigment granules with a particle size from 0.5 to 4 mm, comprising a mixture of at least one organic pigment, a binder having a neutral emulsifier which does not form ions and which dissolves to give a clear solution in water or a C1-C4 alcohol. The mixture is pressed in a continuously operating apparatus consisting of at least one conveying device and a shaping section, and being constructed and operated with a throughput, such that the pressure in its shaping section does not exceed 10 bar. If desired, the cylindrical granules emerging from the dies are converted on a rotating device into ovoid or spherical granules, and the granulated product is dried at a temperature of -50 to 200 ~C at atmospheric pressure or under reduced pressure.
|
