发明名称 |
AROMATIC POLYCARBONATE RESIN PARTICULATE AND PROCESS FOR PRODUCING THE SAME. |
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 m<2>/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 mu m 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 mu m 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> |
申请公布号 |
EP0673958(A1) |
申请公布日期 |
1995.09.27 |
申请号 |
EP19940927065 |
申请日期 |
1994.09.20 |
申请人 |
TEIJIN CHEMICALS, LTD. |
发明人 |
ISSHIKI, HIDEKI TEIJIN CHEMICALS LTD.;MANABE, AKIYOSHI TEIJIN CHEMICALS LTD.;KITACHI, TOSHINORI TEIJIN CHEMICALS LTD.;IKEMURA, YOSHIFUMI TEIJIN CHEMICALS LTD.;KUTSUNA, KATSUHIRO TEIJIN CHEMICALS LTD.;HORIE, TATSUMI TEIJIN CHEMICALS LTD. |
分类号 |
C08J3/12;(IPC1-7):C08G64/06;C08G64/40 |
主分类号 |
C08J3/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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