| 摘要 |
<p>The invention relates to a method for continuously producing cross linked, fine particle geleous polymerizates by copolymerizing: a) water soluble, monoethylenically unsaturated monomers; b) 0.001 to 5 mol %, with regard to monomers (a), of monomers containing at least two ethylenically unsaturated double bonds, and; (c) 0 to 20 mol %, with regard to monomers (a), of water insoluble monoethylenically unsaturated monomers in 20 to 80 wt. % of an aqueous solution in the presence of an initiator and at temperatures ranging from 0 to 140 C, whereby the aqueous solution of the monomers, together with the initiator and an inert gas, are continuously fed to a kneader mixer having at least two shafts which rotate parallel to the axis. A number of kneading and transport elements are situated on the shafts and deliver the substances, which are added at the entry to the kneader mixer, in an axial direction to the end of the mixer. The inventive method is characterized in that the proportion of the heat dissipation effected by evaporating water out of the reaction mixture equals at least 5 % of the reaction heat, and the proportion of the heat dissipation effected by product discharge equals at least 25 % of the reaction heat, and the remaining heat dissipation is effected by cooling the reactor walls.</p> |
