Production of fine amino resin particle having narrow particle diameter distribution |
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| 申请号 | JP5968589 | 申请日 | 1989-03-14 | 公开(公告)号 | JPH0320317A | 公开(公告)日 | 1991-01-29 |
| 申请人 | Mitsui Toatsu Chem Inc; | 发明人 | NAGAOKA MUNEO; HAYANO SABURO; | ||||
| 摘要 | PURPOSE: To obtain particles of an amino resin of a narrow particle diameter distribution without being overground by reacting an amino compound with an aldehyde in the presence of an acid catalyst in an aqueous medium and treating the slurry of the formed solid product by a combination of a plurality of grinding steps and classification steps. CONSTITUTION: A slurried solid polymer obtained by reacting an amino compound such as urea with an aldehyde in the presence of an acid catalyst in an aqueous solution is ground by a combination of a plurality of grinders and classifiers to obtain continuously amino resin particles (of a maximum particle diameter ≤40μm and a mean particle diameter of 5-15μm). A ball mill or an impact mill is used as the primary grinder, a vibrating screen or a hydrocyclone is used as the primary classifier, a pin mill is used as the secondary grinder, and a three-liquid classification cyclone is used as the secondary classifier. COPYRIGHT: (C)1991,JPO&Japio |
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