发明名称 Verfahren zur Herstellung eines verhaeltnismaessig niedermolekularen Polystyrols
摘要 <p>The process of the parent Specification is modified by adding a portion only of the styrene to the partially polymerized ester at the beginning of the reaction and thereafter adding the remainder in portions over predetermined intervals of time during the source of the reaction. Suitably, 25 per cent is added at the start and the remainder added in portions of 25 per cent. If desired, the first portion may be added drop by drop. Heating is continued after the last addition of styrene until the desired viscosity is reached.</p>
申请公布号 DE844351(C) 申请公布日期 1952.07.21
申请号 DE1949B001216D 申请日期 1949.12.23
申请人 LEWIS BERGER & SONS LIMITED, LONDON 发明人 ARMITAGE LESLIE ERNEST WAKEFORD, FRANK;LONDON DONALD HELMSLY HEWITT,
分类号 B01D46/24;B01J23/38;C08F12/08;C08F16/12;C08F212/08;C08F212/14;C08F283/01;C08G63/48;C08G67/00;C09D125/14;C22B7/02;C22B11/02 主分类号 B01D46/24
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