| 摘要 |
<p>An aromatic polycarbonate resin (PC) particulate characterized in that: (a) it is formed of numerous minute powdery particles, (b) it has a specific surface area of 0.05 - 2.0 m2/g, (c) it has a bulk density of 0.3 - 0.8 g/ml, (d) it has an average particle diameter of 0.2 - 5 mm, (e) at least 90 % of the minute powdery particles have particle diameters of 50 νm or less, and (f) the content of a halogenated hydrocarbon as an organic solvent is 50 ppm or less in terms of halogen. A process for producing the PC particulate which comprises: (1) the step (a) of preparing a PC-containing slurry or wet paste, wherein (i) the content of the organic solvent is 10 - 65 wt.% of the total amount of PC and the solvent, and (ii) the content of water is at least 5 % of the amount of PC; (2) the step (b) of atomizing the slurry or wet paste under shear to form minute powdery PC particles at least 90 % of which have particle diameters of 50 νm or less; (3) the step (c) of pressing the minute powdery PC particles thus obtained to form agglomerates, wherein (i) the content of the organic solvent is 10 - 65 wt.% of the total amount of PC and the solvent, and (ii) the content of water is 5 - 120 wt.% of the amount of PC; and (4) the step (d) of crushing or cutting and drying the formed agglomerates of the minute powdery PC particles in an arbitrary order.</p> |
