Process for modifying hydrophilic polymers

Details Process for modifying hydrophilic polymers Process for modifying hydrophilic polymers

C - Chemistry, Metallurgy

08

J

C08J 3/12 (2006.01) B01F 3/12 (2006.01) C08J 3/20 (2006.01)

Patent

CA 2078529

23233-268 ABSTRACT The present invention relates to a process for modify- ing hydrophilic polymers by mixing with a modifier. In the process, the pulverulent polymer and the modifier are introduced continuously into a vertical, cylindrical mixer, mixed at a power of from 1,000 to 5,000 Wh/m3 of powder by means of rotating blades at a blade rate of from 100 to 300 s-1 at a residence time of 1 - 10 seconds, during which the powder is passed through zones having energy dissipation densities of 300 - 600 W/l of mixer volume. The process ensures homogeneous mixing of the modifying components with the pulverulent polymer within a very short time, thus ensuring uniform coating of the surface of the powder particles.

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