| 摘要 |
The method for forming a finely divided polymerizate in the form of a dispersion (D) of particles (50, 51) for the purpose of manufacturing powder lacquers or fiber compound materials comprises two steps:1) In a first step a solution (S1) of a polymer (P), which is dissolved in a first liquid (L1), is emulsified in a second liquid (L2). The polymer is not soluble in the second liquid. The first liquid has a lower boiling point than the second and it is soluble in the second only to a limited extent. Owing to the limited solubility the polymer remains dissolved in the droplets which arise during the emulsification. Under the influence of mechanical means-in particular of a high speed stirring apparatus (31, 32)-and by shear forces caused by the latter, droplets are formed, the average diameter (d) of which corresponds to one of the named uses and is preferably less than 0.03 mm.2) In a second step the first liquid is removed by distillation from the mixture while retaining the emulsion (E), so that the polymer solidifies in the form of particles, in particular spheroid polymer particles.
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